Diagnosis and Testing - Power Steering

Normal Operation and Fault Symptoms

The PSCM has 2 power supplies: the high current Power Steering fuse and the low current Power Steering Amplifier fuse. Refer to Electrical Schematics to check the PSCM circuit for both the high current and low current fuses, as well as the associated power and ground wiring. A Power Steering fuse blown may occur when a power or ground wire shorts to another component, or water intrusion into the associated connectors or splices.

Possible Sources

• Fuse(s)
• Wiring, Terminals or Connectors

• NOTE: This procedure must be performed using FDRS. Do not clear DTCs until the FDRS procedure is complete.
  To complete the diagnosis, go to the FDRS Guided Routine tab and perform the Electronic Power Assist Steering (EPAS) Invalid or Missing Controller Area Network (CAN) Data procedure.
• 
  

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• The PSCM performs self-monitoring and self-testing at specific intervals (initial power-up, power-down, normal operation, etc.). The test requires the PSCM supply voltage to be at or above a specific level (above 6 volts, above 9 volts, 10 to 17 volts, etc.) to run. If one or more self-tests fail, the module sets one or more Diagnostic Trouble Codes (DTCs).

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test applies to PSCM DTC U3000:xx Diagnostic Trouble Codes (DTCs) except U3000:4B. This test does not apply to any module other than the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• To verify the PSCM U3000:XX module and to perform diagnosis if DTC U3000:XX is present and currently active in the PSCM module.

Diagnostic Aids

Diagnostic Aids

• DTC U3000:42 does not affect steering assist and does not cause a message center warning. The PSCM may transmit an incorrect steering wheel angle message over HS-CAN.
• For DTC U3000:49, during the ignition cycle in which the DTC is initially set, the PSCM enters a fault mode and steering assist is gradually reduced until the PSCM enters manual mode. The PSCM sends a message to the IPC to display STEERING FAULT SERVICE NOW in the message center.
• During the next ignition cycle after the DTC is set, if the PSCM is not already in manual mode, the PSCM disables the power steering amplifier and enters manual mode. The module also transmits an incorrect steering wheel angle message over HS-CAN and sends a message to the IPC to display STEERING FAULT SERVICE NOW in the message center.
• Presence of DTC U3000:49 disables additional steering functions: active park assist, Lane Keeping Assist (LKA) and Lane Centering Assist (LCA) are deactivated. If the DTC is set during an assist event, the event is interrupted and the assist system is deactivated.

DTC Fault Trigger Conditions

Possible Sources

• Heat shield missing
• Internal steering column fault
• Incorrect EPAS column installed
• High loads on the EPAS column
• Excessive ambient temperature

Visual Inspection and Pre-checks

• This DTC sets when the PSCM internal self-tests detect a software or internal hardware fault. This may be caused by internal faults in the PSCM or by water intrusion into the PSCM. For additional fault isolation information, refer to the PSCM DTC Chart.

Possible Sources

• Fuse(s)
• Wiring, Terminals or Connectors
• HS-CAN concern
• PSCM

• NOTE: This procedure must be performed using FDRS. Do not clear DTCs until the FDRS procedure is complete.
  To complete the diagnosis, go to the FDRS Guided Routine tab and perform the Electronic Power Assist Steering (EPAS) Invalid or Missing Controller Area Network (CAN) Data procedure.
• 
  

Normal Operation and Fault Symptoms

There are 2 power supplies to the PSCM, the high-current power steering fuse and the low-current power steering fuse. Refer to the wiring diagrams to check the PSCM circuit for both the high-current and low-current fuses, as well as the associated power and ground wiring. A power steering fuse may open when a power or ground wire shorts to another component, or when water intrudes into the associated connectors or splices.

Possible Sources

• Fuse(s)
• Wiring, Terminals or Connectors

• NOTE: This procedure must be performed using FDRS. Do not clear DTCs until the FDRS procedure is complete.
  To complete the diagnosis, go to the FDRS Guided Routine tab and perform the Electronic Power Assist Steering (EPAS) Invalid or Missing Controller Area Network (CAN) Data procedure.
• 
  

Possible Sources

• Fuse(s)
• Wiring, Terminals or Connectors
• HS-CAN concern
• PSCM

Visual Inspection and Pre-checks

• Repair manual diagnostics for any other module not communicating with the PSCM must be completed before entering this test.

• NOTE: This procedure must be performed using FDRS. Do not clear DTCs until the FDRS procedure is complete.
  To complete the diagnosis, go to the FDRS Guided Routine tab and perform the Electronic Power Assist Steering (EPAS) Invalid or Missing Controller Area Network (CAN) Data procedure.
• 
  

Normal Operation and Fault Symptoms

There are 2 power supplies to the PSCM, the high-current power steering fuse and the low-current power steering fuse. Refer to the wiring diagrams to check the PSCM circuit for both the high-current and low-current fuses, as well as the associated power and ground wiring. A power steering fuse may open when a power or ground wire shorts to another component, or when water intrudes into the associated connectors or splices.

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If there is a loss of communication or DTCs for voltage in the PSCM or other vehicle modules, the possible source may be fuses or wiring, terminals or connectors.
• If DTCs other than loss of communication or voltage in the PSCM or other vehicle modules are present, the possible source may be an internal fault in the PSCM or other vehicle modules.
• If no DTCs are present in the PSCM or other vehicle modules, the concern may be resolved using a service article such as a TSB, GSB, SSM or FSA.

Possible Sources

• Fuse(s)
• Wiring, Terminals or Connectors
• Internal PSCM fault
• Internal fault in other CAN modules

• The ignition is on.

• Using a diagnostic scan tool, retrieve Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Normal Operation and Fault Symptoms

Description

Description

• The steering wheel may vibrate or shake and resist turning into the adjacent lane when turn signals are not used to change lanes. This may be normal operation of the Lane Keeping Assist feature.
• .

REFER TO: Lane Keeping System - System Operation and Component Description (Lane Keeping System 419-07, Description and Operation).

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test applies to the following diagnostic concerns:
• Steering wheel vibrates or resists turning

This test does NOT APPLY to any other DTC or symptom.

Diagnostic Strategy

Diagnostic Strategy

• Determine whether the vehicle is equipped with Lane Keeping Assist and explain to the customer how this feature is activated, deactivated and used properly. Verify the vibration and resistance to turning no longer occurs when the Lane Keeping Assist feature is turned off.

• Refer to the following information sources on the PTS website:
• Owner's Literature - REFER TO DRIVING ASSISTANCE
• Owner's Literature, Quick Reference Guide - REFER TO FEATURES
• Lane Keeping Assist Reference Guide (all vehicles)

Possible Sources

• Normal Lane Keeping Assist Operation

• This message appears when a condition is detected that requires the PSCM to disable the system (remove assistance) to prevent any possible damage. This message (and its associated symptom) may clear when the ignition is cycled and may not be present during diagnosis, or it may not clear until the condition is corrected.

• This message appears if a condition (for example, high friction) exists that places an additional load on the EPAS system. Steering assist is maintained for the current ignition cycle. If the ignition is turned off and then back on, STEERING MAINTENANCE REQUIRED NOW appears in the message center, and steering assist is disabled until the condition is repaired.

Possible Sources

• This message appears when a condition requiring the PSCM to disable the EPAS system (remove assistance) is detected to prevent any possible damage. This message (and its associated symptom) may clear when the ignition is cycled and may not be present during diagnosis.

• This message appears if a condition requiring the PSCM to immediately reduce steering assist, gradually reduce assist, or fully disable assist is detected in the EPAS system, so that the system does not sustain any possible damage. This message (and its associated symptom) may clear when the ignition key is cycled and may not be present during diagnosis.

Possible Sources

Possible Sources

Possible Sources

• Heat Shields
• Stabilizer Bar Insulators or Links
• Front Shock Absorber Brackets or Strut Mounts
• Steering Gear Tie Rods Loose
• Steering Gear Bolts Loose
• Front Brake Calipers or Pins Loose
• Lower Control Arm to Crossmember Bolts or Bushings Loose.
• Ball Joint Loose
• Exhaust Heat Shield, Insulators, or Brackets Loose
• Crossmember to Body Mounting Points
• Upper or Lower Steering Shaft
• Internal or External Steering Gear Stops

• Ignition OFF.

• Check OASIS for any applicable noise TSB, GSB, SSM, or FSA related to the following components:
  • Dash Boots
  • Front Axles
  • Engine Mounts
  • Shocks
  • Struts
  • Control Arms and Links
  • Stabilizers
  • Wheel Hubs

• Drive the vehicle and attempt to verify the noise.

• Using a good light source, visually inspect the following components for potential concerns (loose, damaged, worn, broken, binding):
  • Springs, Shock Absorbers, Struts, Strut Bearings, Bushings, or Bump Stops
  • Stabilizer Bar Links and Insulators
  • Tires
  • Tie Rod Ends
  • Upper and Lower Steering Column Shafts
  • Steering Stops
  • Steering Gear Mounts or Bolts Loose
  • Front Brake Caliper, Caliper Pins or Brake Discs
  • Front Control Arm and Bushings
  • Front Axle Shafts and Bearings (if equipped)
  • Condition of Subframe or Crossmember, Mounts or Fasteners
  • Engine or Transmission Mounts
  • Lower Control Arm to Subframe Bolts Loose
  • Ball Joint Loose
  • Exhaust Manifold Heat Shield Loose, Insulators or Brackets

• Using a listening device such as Chassis Ears:
  • Attach the listening device to the left and front strut mounts.
  • Prepare the vehicle for road test.
  • With an assistant, attempt to reproduce the noise while listening to the device.

• Using a listening device such as Chassis Ears:
  • Attach probe 1 to the left strut tower.
    • If this is the loudest, inspect the strut tower mount and fasteners for looseness and wear.
  • Attach probe 2 to the left coil spring.
    • If louder, inspect the strut upper bearing assembly for looseness and wear.
  • Attach probe 3 to the left lower control arm to subframe mounting point.
    • If louder, inspect the control arm and bushings, subframe and bushings, stabilizer bar bushings and links (general), and related bolts for looseness and wear.
  • Attach probe 4 to the steering gear housing.
    • If this is the loudest, inspect the inner and outer tie rods, mounting bushings, bolts, and the input shaft for looseness and wear. Place hands on the steering shaft boot to check for noise or vibration transmitted into the steering gear (general). Check whether other nearby components transmit noise vibration into the steering gear (general).

• With an assistant, road test the vehicle and listen to all 4 probes.

• Using a listening device such as Chassis Ears:
  • Attach probe 1 to the right strut tower.
    • If this is the loudest, inspect the strut tower mount and fasteners for looseness and wear.
  • Attach probe 2 to the right coil spring.
    • If louder, inspect the strut upper bearing assembly for looseness and wear.
  • Attach probe 3 to the right lower control arm to subframe mounting point.
    • If louder, inspect the control arm and bushings, subframe and bushings, stabilizer bar bushings and links (general), and related bolts for looseness and wear.
  • Attach probe 4 to the steering gear housing.
    • If this is the loudest, inspect the inner and outer tie rods, mounting bushings, bolts, and the input shaft for looseness and wear. Place hands on the steering shaft boot to check for noise or vibration transmitted into the steering gear (general). Check whether other nearby components transmit noise vibration into the steering gear (general).

• With an assistant, road test the vehicle and listen to all 4 probes.

• Using a listening device such as Chassis Ears:
  • Attach probe 1 to the center of the subframe (or engine crossmember for body-on-frame vehicles).
    • If louder, inspect the subframe, subframe mounts, and any fastening hardware (stabilizer bar bushing mounts) for correct torque specifications, damage, wear, or witness marks. Inspect the engine and transmission mounts for debris, correct torque specification, damage, or wear.
  • Attach probe 2 to the dash panel.
    • If this is the loudest, inspect the dash panel for damage or loose components (brackets, tubes, wiring harnesses, grommets).
  • Attach probe 3 to the center of the steering gear housing.
    • If louder, inspect the steering gear inner and outer tie rods, mounting bushings, wiring harnesses, and related components. Inspect the input shaft, boot, and spline joint for lubrication. Place hands on the steering shaft boot and check whether vibration or noise is transmitted to the steering gear.

• With an assistant, road test the vehicle and listen to all 3 probes.

• Using a strong light source, inspect the following items:
  • steering gear mounting points to the subframe
  • intermediate shaft attachment to the steering gear
  • outer steering tie rod attachment points

• Make sure the following fasteners are tightened to specification (refer to Section 211-02 in the Repair Manual for the correct torque specifications):
  • Steering gear-to-subframe bolts
  • Intermediate shaft-to-steering gear bolt
  • Outer tie rod nuts

Possible Sources

• Springs, shock absorbers, struts, and bearings or bushings (most common)
• Tires
• Inner steering gear stops (full turn)
• Outer steering stops (full turn)
• Steering tie rods (loose)
• Steering Gear Mounts or Bolts Loose
• Stabilizer Bar Insulators or Links
• Integrated front wheel hubs (4x4 only)
• Front control arms and bushings
• Front axle shaft and bearings (metallic rattle or knock at low speeds) (if equipped)
• Condition of Subframe or Crossmember, Mounts or Fasteners
• Engine or Transmission Mounts

• Ignition OFF.

• Check OASIS for any applicable noise TSB, GSB, SSM, or FSA related to the following components:
  • Dash Boots
  • Front Axles
  • Engine Mounts
  • Shocks
  • Struts
  • Control Arms and Links
  • Stabilizers
  • Wheel Hubs

• Drive the vehicle and attempt to verify the noise.

• Using a good light source, visually inspect the following components for potential concerns (loose, damaged, worn, broken, binding):
  • Springs, Shock Absorbers, Struts, Strut Bearings, Bushings, or Bump Stops
  • Stabilizer Bar Links and Insulators
  • Tires
  • Tie Rod Ends
  • Upper and Lower Steering Column Shafts
  • Steering Stops
  • Steering Gear Mounts or Bolts Loose
  • Front Brake Caliper, Caliper Pins or Brake Discs
  • Front Control Arm and Bushings
  • Front Axle Shafts and Bearings (if equipped)
  • Condition of Subframe or Crossmember, Mounts or Fasteners
  • Engine or Transmission Mounts
  • Lower Control Arm to Subframe Bolts Loose
  • Ball Joint Loose
  • Exhaust Manifold Heat Shield Loose, Insulators or Brackets

• Using a listening device such as Chassis Ears:
  • Attach the listening device to the left and front strut mounts.
  • Prepare the vehicle for road test.
  • With an assistant, attempt to reproduce the noise while listening to the device.

• Using a listening device such as Chassis Ears:
  • Attach probe 1 to the left strut tower.
    • If this is the loudest, inspect the strut tower mount and fasteners for looseness and wear.
  • Attach probe 2 to the left coil spring.
    • If louder, inspect the strut upper bearing assembly for looseness and wear.
  • Attach probe 3 to the left lower control arm to subframe mounting point.
    • If louder, inspect the control arm and bushings, subframe and bushings, stabilizer bar bushings and links (general), and related bolts for looseness and wear.
  • Attach probe 4 to the steering gear housing.
    • If this is the loudest, inspect the inner and outer tie rods, mounting bushings, bolts, and the input shaft for looseness and wear. Place hands on the steering shaft boot to check for noise or vibration transmitted into the steering gear (general). Check whether other nearby components transmit noise vibration into the steering gear (general).

• With an assistant, road test the vehicle and listen to all 4 probes.

• Using a listening device such as Chassis Ears:
  • Attach probe 1 to the right strut tower.
    • If this is the loudest, inspect the strut tower mount and fasteners for looseness and wear.
  • Attach probe 2 to the right coil spring.
    • If louder, inspect the strut upper bearing assembly for looseness and wear.
  • Attach probe 3 to the right lower control arm to subframe mounting point.
    • If louder, inspect the control arm and bushings, subframe and bushings, stabilizer bar bushings and links (general), and related bolts for looseness and wear.
  • Attach probe 4 to the steering gear housing.
    • If this is the loudest, inspect the inner and outer tie rods, mounting bushings, bolts, and the input shaft for looseness and wear. Place hands on the steering shaft boot to check for noise or vibration transmitted into the steering gear (general). Check whether other nearby components transmit noise vibration into the steering gear (general).

• With an assistant, road test the vehicle and listen to all 4 probes.

• Using a listening device such as Chassis Ears:
  • Attach probe 1 to the center of the subframe (or engine crossmember for body-on-frame vehicles).
    • If louder, inspect the subframe, subframe mounts, and any fastening hardware (stabilizer bar bushing mounts) for correct torque specifications, damage, wear, or witness marks. Inspect the engine and transmission mounts for debris, correct torque specification, damage, or wear.
  • Attach probe 2 to the dash panel.
    • If this is the loudest, inspect the dash panel for damage or loose components (brackets, tubes, wiring harnesses, grommets).
  • Attach probe 3 to the center of the steering gear housing.
    • If louder, inspect the steering gear inner and outer tie rods, mounting bushings, wiring harnesses, and related components. Inspect the input shaft, boot, and spline joint for lubrication. Place hands on the steering shaft boot and check whether vibration or noise is transmitted to the steering gear.

• With an assistant, road test the vehicle and listen to all 3 probes.

• Using a strong light source, inspect the following items:
  • steering gear mounting points to the subframe
  • intermediate shaft attachment to the steering gear
  • outer steering tie rod attachment points

• Make sure the following fasteners are tightened to specification (refer to Section 211-02 in the Repair Manual for the correct torque specifications):
  • Steering gear-to-subframe bolts
  • Intermediate shaft-to-steering gear bolt
  • Outer tie rod nuts

Normal Operation and Fault Symptoms

Description

Description

• Due to different steering column hardware versions, a new PSCM module must be installed that is calibrated or programmed with the correct software level and the applicable calibration files.

Diagnostic Aids

Diagnostic Aids

• For additional PMI information, REFER TO: Module Programming (418-01 Module Configuration, General Procedures).
  .

DTC Fault Trigger Conditions

Possible Sources

• PSCM is not configured.
• PSCM configuration is not complete.

Visual Inspection and Pre-checks

• Refer to Steering GSB for additional guidance on checking connectors and wiring.

Normal Operation and Fault Symptoms

Description

Description

• When a new EPAS column is installed, the PSCM remains unconfigured and must be configured with vehicle information. Configuration is checked during the initial PSCM power-up (ignition on) when voltage to the PSCM is above 6 volts.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test applies to PSCM DTC U2300 Central Configuration Not Complete. It does not apply to any module other than the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• Use this test to diagnose PSCM DTC U2300 when DTC U2300 is currently active in the PSCM.

Diagnostic Aids

Diagnostic Aids

• REFER TO: Module Configuration - System Operation and Component Description (418-01 Module Configuration, Description and Operation).

DTC Fault Trigger Conditions

Possible Sources

• PSCM not configured
• PSCM configuration not complete

Visual Inspection and Pre-checks

• This DTC sets if complete PSCM configuration has not been performed or if configuration has failed.

Possible Sources

• Steering shaft sliding joints or lower input shaft (lubrication required)
• Roll restrictor
• Engine mounts
• Exhaust heat shield (tin rattle)
• Exhaust isolators and brackets
• Subframe mounts
• Engine-to-chassis wiring, pipes, brackets (loose or out of position)
• Half shafts (if equipped)
• Center bearing (right half shaft)

• Road test the vehicle and determine whether the noise occurs only during braking, or whether it occurs during braking, acceleration and deceleration.

• NOTE: Noise sources can be located with a stethoscope or by hand while rocking the vehicle. Noise input and output is usually not related to the steering system. Prepare the vehicle for testing in a quiet place on a level surface.
  • Position the front wheels straight ahead.
  • Place the transmission in PARK (automatic transmission) or THIRD (manual transmission).
  • Turn the engine off.
  • Release the parking brake.
  • Open the hood.

• Rock the vehicle forward and backward by pushing on the front bumper and attempt to locate the noise source.
  • Rocking the vehicle causes the engine mounts to flex, which moves several components.

• Possible noise sources include, but are not limited to:
  • Steering column shaft sliding joint
  • Transmission or engine mounts
  • Roll restrictor
  • Subframe mounts
  • Axle Shafts or Half Shafts
  • Propeller Shafts
  • All coolant hoses, A/C lines and wiring harnesses
  • Exhaust hangers and other related exhaust system components

• Place the transmission in NEUTRAL, raise and support the vehicle.
  REFER TO: Jacking and Lifting - Overview (100-02 Jacking and Lifting, Description and Operation).

• Using a strong light source, visually inspect the following components for potential concerns (loose, damaged, broken):
  • Engine Mounts
  • Transmission mounts
  • Roll restrictors
  • Heat shield(s) (tin rattle)
  • Steering gear shield
  • Exhaust isolators and bracket
  • Steering column shaft sliding joints (dry condition)
  • Subframe mounts
  • Engine or chassis wiring, pipes or brackets (loose or out of position)
  • Half shafts or driveshafts
  • Center shaft bearing (if equipped)

• If the noise occurs during braking AND during rocking or bumping, it is generally not a noise related to the steering system.

• Braking noises are related to parts that move during braking.

Possible Sources

• Caliper anchors, calipers or brake pads
• Upper strut mount or bearings (if equipped)
• Lower control arm to subframe bushings and bolts
• Engine-to-chassis wiring, pipes or brackets (loose or out of position)
• Exhaust isolators and brackets
• Subframe mounts
• Powertrain mounts or engine roll restrictor mounts
• Exhaust isolators or brackets
• Steering shaft sliding joints

• Road test the vehicle and determine whether the noise occurs only during braking, or whether it occurs during braking, acceleration and deceleration.

• NOTE: Noise sources can be located with a stethoscope or by hand while rocking the vehicle. Noise input and output is usually not related to the steering system. Prepare the vehicle for testing in a quiet place on a level surface.
  • Position the front wheels straight ahead.
  • Place the transmission in PARK (automatic transmission) or THIRD (manual transmission).
  • Turn the engine off.
  • Release the parking brake.
  • Open the hood.

• Rock the vehicle forward and backward by pushing on the front bumper and attempt to locate the noise source.
  • Rocking the vehicle causes the engine mounts to flex, which moves several components.

• Possible noise sources include, but are not limited to:
  • Steering column shaft sliding joint
  • Transmission or engine mounts
  • Roll restrictor
  • Subframe mounts
  • Axle Shafts or Half Shafts
  • Propeller Shafts
  • All coolant hoses, A/C lines and wiring harnesses
  • Exhaust hangers and other related exhaust system components

• Place the transmission in NEUTRAL, raise and support the vehicle.
  REFER TO: Jacking and Lifting - Overview (100-02 Jacking and Lifting, Description and Operation).

• Using a strong light source, visually inspect the following components for potential concerns (loose, damaged, broken):
  • Engine Mounts
  • Transmission mounts
  • Roll restrictors
  • Heat shield(s) (tin rattle)
  • Steering gear shield
  • Exhaust isolators and bracket
  • Steering column shaft sliding joints (dry condition)
  • Subframe mounts
  • Engine or chassis wiring, pipes or brackets (loose or out of position)
  • Half shafts or driveshafts
  • Center shaft bearing (if equipped)

Normal Operation and Fault Symptoms

The PSCM calculates steering wheel speed, angle and direction of rotation and sends the information to the ABS module over FD-CAN. If the information is incorrect, invalid or corrupted, the ABS module sets one or more diagnostic trouble codes (DTCs).

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test applies to mechanical PSCM concerns causing ABS module DTC C006B:xx, ABS module DTC C0051:xx, or a false trigger only.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• This spot test checks how driving events and mechanical component conditions can affect steering. Compares steering wheel angle between the ABS module and the PSCM.

Diagnostic Aids

Diagnostic Aids

• The ABS module diagnostic trouble codes (DTC) C006B:xx and C0051:xx set when the steering wheel angle information from the ABS module and the steering wheel angle information from the PSCM compare outside the expected range. Both mechanical and electrical components can cause this condition.

DTC Fault Trigger Conditions

Possible Sources

• Tire Pressure
• Wheel speed sensor
• Incorrectly installed RCM
• Network communication fault
• Incomplete or incorrect stability control sensor calibration
• Wheels and Tires
• Front Suspension Components
• Steering System Components
• RCM
• PSCM

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• The PSCM monitors HS-CAN messages when the ignition has been on for more than 5 seconds, the voltage at the PSCM is greater than 10 volts, and there are no diagnostic trouble codes (DTCs) preventing PSCM operation.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test applies to PSCM DTC U0100 Lost Communication with PCM only. It does not apply to any module other than the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• Check that the PSCM wire harness and connectors are in good condition. This test checks the connectors and wiring from the PSCM module, the 3-way connector on the steering column, and the inline connector in the passenger compartment. If these circuits operate correctly, the test then directs you to check the PCM and wire harness.

Diagnostic Aids

Diagnostic Aids

• For additional information on messages sent to the PSCM from the PCM, refer to the network message list in Section 211-02 of the Workshop Manual.
• Do not install a new PSCM module as part of PSCM module repair. Diagnostic trouble code U0100:00.

DTC Fault Trigger Conditions

Possible Sources

• Fuse
• Wiring, Terminals or Connectors
• PCM

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• The PSCM monitors HS-CAN messages when the voltage at the PSCM is greater than 10 volts and there are no diagnostic trouble codes (DTCs) present that prevent PSCM operation.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test applies to PSCM DTC U0121 Lost Communication with ABS only. It does not apply to any module other than the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• Check that the PSCM wire harness and connectors are in good condition. This test checks the connectors and wiring from the PSCM module, the 3-way connector on the steering column, and the inline connector in the passenger compartment. If these circuits operate correctly, the test then directs you to check the ABS module and wire harness.

Diagnostic Aids

Diagnostic Aids

• Do not install a new PSCM module as part of PSCM module repair. Diagnostic trouble code U0121:00.
• For additional information on messages sent to the PSCM from the ABS module, refer to the network message list in Section 211-02 of the Workshop Manual.
• Presence of DTC U0121:00 may prevent the additional steering functions; Active Park Assist, Lane Keeping Aid (LKA) and Lane Centering Assist (LCA) from activating. If the DTC sets during an assist event, the event is terminated and the assist function is deactivated.

DTC Fault Trigger Conditions

Possible Sources

• Fuse(s)
• Wiring, Terminals or Connectors
• Network communication fault
• ABS Module

Visual Inspection and Pre-checks

• This DTC sets when the PSCM does not receive messages from the ABS module for a specified period of time. This may occur if the ABS module wiring harness or electrical connectors are loose or damaged, or if the vehicle battery state of charge is low. If necessary, refer to the DTC Index for additional information.
• Refer to Steering GSB for additional guidance on checking connectors and wiring.

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• The PSCM monitors HS-CAN messages when the voltage at the PSCM is greater than 9 volts and no diagnostic trouble codes (DTCs) are present, preventing PSCM operation.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test applies to PSCM DTC U0140 Lost Communication With BCM only. It does not apply to any module other than the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• Check that the PSCM wiring harness and connectors are in good condition. This test checks the connectors and wiring from the PSCM module, the 3-way connector at the steering column to the inline connector in the passenger compartment. If these circuits are functioning correctly, the test then directs you to check the BCM and wiring harness.

Diagnostic Aids

Diagnostic Aids

• For additional information on messages sent to the PSCM from the BCM module, refer to the Network Message Chart in Section 211-02 of the workshop manual.
• Do not install a new PSCM module as part of the PSCM module repair. DTC U0140:00.

DTC Fault Trigger Conditions

Possible Sources

• Fuse(s)
• Wiring, Terminals or Connectors
• Network communication fault
• BCM

Visual Inspection and Pre-checks

• This DTC sets when the PSCM does not receive messages from the ABS module for a specified period of time. This may occur if the ABS module wiring harness or electrical connectors are loose or damaged, or if the vehicle battery state of charge is low. If necessary, refer to the DTC Index for additional information.
• Refer to Steering GSB for additional guidance on checking connectors and wiring.

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• The PSCM monitors HS-CAN messages when the voltage at the PSCM is greater than 10 volts and there are no diagnostic trouble codes (DTCs) present that prevent PSCM operation.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test applies to PSCM DTC U0146 Lost Communication With GWM only. It does not apply to any module other than the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list results in a large number of diagnostic trouble codes (DTCs), first diagnose all serious module DTCs (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (lost communication or invalid data). If voltage-related DTCs are present, diagnose them after any serious module DTCs and before any network faults. Diagnose all current and active DTCs before diagnosing any history DTCs.

Accurate Test Purpose

Accurate Test Purpose

• Check that the PSCM wiring harness and connectors are in good condition. This test checks the connectors and wiring from the PSCM module, the 3-way connector at the steering column to the inline connector in the passenger compartment. If these circuits are functioning correctly, the test then directs you to check the GWM and wiring harness.

Diagnostic Aids

Diagnostic Aids

• For additional information on messages sent to the PSCM from the GWM module, refer to the Network Message Chart in Section 211-02 of the workshop manual.
• Do not install a new PSCM module as part of the PSCM module repair. DTC U0146:00.
• Presence of DTC U0146:00 prevents the Evasive Steering Assist (ESA) function from activating. If the DTC sets during an assist event, the event is terminated and the assist system is deactivated.

DTC Fault Trigger Conditions

Possible Sources

• Fuse(s)
• Wiring, Terminals or Connectors
• Network communication fault
• GWM

Visual Inspection and Pre-checks

• This DTC sets when the PSCM does not receive messages from the GWM module for a specified period of time. This may occur if the GWM module wiring harness or electrical connectors are loose or damaged, or if the vehicle battery state of charge is low. If necessary, refer to the DTC Index for additional information.
• Refer to Steering GSB for additional guidance on checking connectors and wiring.

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• The PSCM monitors the HS-CAN when the ignition is on for more than 5 seconds, the voltage at the PSCM is greater than 10 volts and no diagnostic trouble codes (DTCs) are present, preventing PSCM operation.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test applies to PSCM DTC U0151 Lost Communication With RCM only. It does not apply to any module other than the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• Check that the PSCM wiring harness and connectors are in good condition. This test checks the connectors and wiring from the PSCM module, the 3-way connector at the steering column to the inline connector in the passenger compartment. If these circuits are functioning correctly, the test then directs you to check the RCM and wiring harness.

Diagnostic Aids

Diagnostic Aids

• For additional information on messages sent to the PSCM from the RCM module, refer to the Network Message Chart in Section 211-02 of the workshop manual.
• Do not install a new PSCM module as part of the PSCM module repair. DTC U151:00.
• Presence of DTC U0151:00 prevents the Lane Centering Assist (LCA) function from activating. If the DTC sets during an assist event, the event is terminated and the assist system is deactivated.

DTC Fault Trigger Conditions

Possible Sources

• Fuse(s)
• Wiring, Terminals or Connectors
• Network communication fault
• RCM

Visual Inspection and Pre-checks

• This DTC sets when the PSCM does not receive messages from the RCM module for a specified period of time. This may occur if the RCM module wiring harness or electrical connectors are loose or damaged, or if the vehicle battery state of charge is low. If necessary, refer to the DTC Index for additional information.
• Refer to Steering GSB for additional guidance on checking connectors and wiring.

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• The PSCM monitors HS-CAN messages when the ignition has been on for more than 5 seconds, the voltage at the PSCM is greater than 10 volts, and there are no diagnostic trouble codes (DTCs) preventing PSCM operation.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test applies to PSCM DTC U0155 Lost Communication With IPC only. It does not apply to any module other than the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• Check the PSCM wiring harness and connectors for good condition. This test checks the connectors and wiring from the PSCM module, the 3-way connector on the steering column to the in-line connector in the passenger compartment. If these circuits operate correctly, the test then directs you to check the IPC and the wiring harness.

Diagnostic Aids

Diagnostic Aids

• For more information on messages sent to the PSCM from the IPC, refer to the Network Message Chart in Section 211-02 of the Workshop Manual.
• Do not install a new PSCM module as part of the PSCM repair. Diagnostic Trouble Code U0155:00.

DTC Fault Trigger Conditions

Possible Sources

• Fuse
• Wiring, Terminals or Connectors
• PCM

Visual Inspection and Pre-checks

• This DTC sets when the PSCM module does not receive IPC messages for a specified period of time. This may occur if the IPC wiring harness or electrical connectors are loose or damaged, or if the vehicle battery state of charge is low. If necessary, refer to the DTC Index for additional information.
• Refer to Steering GSB for additional guidance on checking connectors and wiring.

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• The PSCM monitors HS-CAN messages when the ignition has been on for more than 5 seconds, the voltage at the PSCM is greater than 10 volts, and there are no diagnostic trouble codes (DTCs) preventing PSCM operation.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test applies to PSCM DTC U0159 Lost Communication with PAM only. It does not apply to any other module except the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• Check the PSCM wiring harness and connectors for good condition. This test checks the connectors and wiring from the PSCM module, the 3-way connector on the steering column to the in-line connector in the passenger compartment. If these circuits operate correctly, the test then directs you to check the IPC and the wiring harness.

Diagnostic Aids

Diagnostic Aids

• For more information on messages sent to the PSCM from the PAM, refer to the Network Message Chart in Section 211-02 of the Workshop Manual.
• Do not install a new PSCM module as part of the PSCM repair. Diagnostic Trouble Code U0159:00.

DTC Fault Trigger Conditions

Possible Sources

• Fuse
• Wiring, Terminals or Connectors
• PAM

Visual Inspection and Pre-checks

• This DTC sets when the PSCM module does not receive PAM messages for a specified period of time. This may occur if the PAM wiring harness or electrical connectors are loose or damaged, or if the vehicle battery state of charge is low. If necessary, refer to the DTC Index for additional information.
• Refer to Steering GSB for additional guidance on checking connectors and wiring.

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• The PSCM monitors HS-CAN messages when the ignition has been on for more than 5 seconds, the voltage at the PSCM is greater than 10 volts, and there are no diagnostic trouble codes (DTCs) preventing PSCM operation.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test applies to PSCM DTC U0212 Lost Communication with SCCM only. It does not apply to any other module except the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• Check the PSCM wiring harness and connectors for good condition. This test checks the connectors and wiring from the PSCM module, the 3-way connector on the steering column to the in-line connector in the passenger compartment. If these circuits operate correctly, the test then directs you to check the SCCM and the wiring harness.

Diagnostic Aids

Diagnostic Aids

• For more information on messages sent to the PSCM from the SCCM, refer to the Network Message Chart in Section 211-02 of the Workshop Manual.
• Do not install a new PSCM module as part of the PSCM repair. Diagnostic Trouble Code U0212:00.

DTC Fault Trigger Conditions

Possible Sources

• Fuse
• Wiring, Terminals or Connectors
• SCCM

Visual Inspection and Pre-checks

• This DTC sets when the PSCM does not receive SCCM messages for a specified period of time. This may occur if the SCCM wiring harness or electrical connectors are loose or damaged, or if the vehicle battery state of charge is low. If necessary, refer to the DTC Index for additional information.
• Refer to Steering GSB for additional guidance on checking connectors and wiring.

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• The IPMA is integrated into the interior rearview mirror. The PSCM monitors HS-CAN messages when the voltage at the PSCM is above 10 volts and no Diagnostic Trouble Codes (DTCs) are present. Stops PSCM operation.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test applies to PSCM DTC U023A Lost Communication with Image Processing Module "A" only. It does not apply to any other module except the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• Check the PSCM wiring harness and connectors for good condition. This test checks the connectors and wiring from the PSCM module, the 3-way connector on the steering column to the in-line connector in the passenger compartment. If these circuits operate correctly, the test then directs you to check the IPMA and the wiring harness.

Diagnostic Aids

Diagnostic Aids

• For more information on messages sent to the PSCM from the IPMA module, refer to the Network Message Chart in Section 211-02 of the Workshop Manual.
• Do not install a new PSCM module as part of the PSCM repair. Diagnostic Trouble Code U023A:00.
• The presence of DTC U023A:00 may prevent the following steering assist functions from activating: Evasive Steering Assist (ESA), Lane Keeping Assist (LKA), and Lane Centering Assist (LCA). If the DTC sets during an assist event, the event is terminated and the assist function is deactivated.

DTC Fault Trigger Conditions

Possible Sources

• Fuse(s)
• Wiring, Terminals or Connectors
• Network communication fault
• IPMA

Visual Inspection and Pre-checks

• This DTC sets when the PSCM module does not receive IPMA module messages for a specified period of time. This may occur if the IPMA module wiring harness or electrical connectors are loose or damaged, or if the vehicle battery state of charge is low. If necessary, refer to the DTC Index for additional information.
• Refer to Steering GSB for additional guidance on checking connectors and wiring.

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• The PSCM monitors HS-CAN messages when the voltage at the PSCM is greater than 10 volts and there are no diagnostic trouble codes (DTCs) present that prevent PSCM operation.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test applies to PSCM DTC U0401 Invalid/Unknown Data Received from Engine Control Module only. It does not apply to any other module except the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• To direct diagnosis to the module and associated circuit sending erroneous or unknown information in the messages.

Diagnostic Aids

Diagnostic Aids

• For more information on messages sent to the PSCM from the PCM module, refer to the Network Message Chart in Section 211-02 of the Workshop Manual.
• DTC U0401:00 indicates a concern with the PCM. The reporting module is not the faulty module for this DTC. Do not install a new PSCM as part of the repair for PSCM Diagnostic Trouble Code U0401:00.
• If this DTC is set, steering effort is reduced, resulting in increased steering effort during low-speed maneuvers.

DTC Fault Trigger Conditions

Possible Sources

• HS-CAN concern
• One or more steering components are installed incorrectly.
• PCM Concern

Visual Inspection and Pre-checks

• This DTC sets when the PSCM does not receive messages from the PCM within a specified period of time. This may occur if the PCM harness or electrical connectors are loose or damaged, or if the vehicle battery state of charge is low. If necessary, refer to the DTC Index for additional information.
• Refer to Steering GSB for additional guidance on checking connectors and wiring.

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• The PSCM monitors HS-CAN messages when the voltage at the PSCM is greater than 10 volts and there are no diagnostic trouble codes (DTCs) present that prevent PSCM operation.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test is for PSCM DTC U0415 Invalid Data Received From ABS Module "A" Only. It does not apply to any other module except the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• To direct diagnosis to the module and associated circuit sending erroneous or unknown information in the messages.

Diagnostic Aids

Diagnostic Aids

• Steering assist may be reduced if the vehicle speed signal is not present. The module may transmit an incorrect steering wheel angle message over HS-CAN if the angle offset from the ABS module is not present.
• For additional information on messages sent to the PSCM from the ABS module, refer to the network message list in Section 211-02 of the Workshop Manual.
• DTC U0415:00 indicates a concern with the ABS. The reporting module for this DTC is not the faulty module. Do not install a new PSCM as part of the repair for PSCM Diagnostic Trouble Code U0415:00.
• Presence of a DTC U0415:00 may prevent additional steering functions; Active Park Assist, Lane Keeping Aid (LKA) and Lane Centering Assist (LCA) from activating. If the DTC sets during an assist event, the event will terminate and the assist function will be deactivated.

DTC Fault Trigger Conditions

Possible Sources

• HS-CAN concern
• One or more steering components are installed incorrectly.
• ABS Module

Visual Inspection and Pre-checks

• This DTC sets when the PSCM does not receive messages from the ABS module for a specified period of time. This may occur if the ABS module wiring harness or electrical connectors are loose or damaged, or if the vehicle battery state of charge is low. If necessary, refer to the DTC Index for additional information.
• Refer to Steering GSB for additional guidance on checking connectors and wiring.

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• The PSCM monitors CAN messages when the ignition has been on for more than 5 seconds, the PSCM voltage is greater than 9 volts, and there are no Diagnostic Trouble Codes (DTCs) that inhibit PSCM operation.
• The SCCM uses inputs from several sensors and components to collect vehicle data, then transmits this data to the PSCM. If the data is corrupted or invalid, the SCCM sends "invalid", "faulty" or "unknown" instead of the actual sensor data. For a list of messages sent to the PSCM from the SCCM, refer to the Network Message Chart in Description and Operation, Section 211-02 of the Workshop Manual.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test is for PSCM DTC U0429 Invalid Data Received From Steering Column Control Module Only. It does not apply to any other module except the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• To verify the presence of DTC U0429 and identify the correct Workshop Manual section to diagnose the DTC concern.

Diagnostic Aids

Diagnostic Aids

• DTC U0429:00 indicates a concern with the operating mode message, torque compensation message, or braking effort reduction message sent from the SCCM.
• The module reporting this DTC is not the faulty module. Do not install a new PSCM as part of the repair for PSCM Diagnostic Trouble Code U0429:00.

DTC Fault Trigger Conditions

Possible Sources

• Sensors and Components Related to the SCCM
• SCCM

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• The Gateway Serial Data Module is also known as the GWM.
• The PSCM monitors CAN messages when the ignition has been on for more than 5 seconds, the PSCM voltage is greater than 9 volts, and there are no Diagnostic Trouble Codes (DTCs) that inhibit PSCM operation.
• The GWM uses inputs from several sensors and components to collect vehicle data, then transmits this data to the PSCM. If the data is corrupted or invalid, the GWM sends "invalid", "faulty" or "unknown" instead of the actual sensor data. For a list of messages sent to the PSCM from the GWM, refer to the Network Message Chart in Description and Operation, Section 211-02 of the Workshop Manual.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test is for PSCM DTC U2100 Initial Configuration Not Complete. It does not apply to any other module except the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• To verify the presence of DTC U0447 and identify the correct Workshop Manual section to diagnose the DTC concern.

Diagnostic Aids

Diagnostic Aids

• DTC U0447:00 indicates a concern with the messages sent from the GWM. The module reporting this DTC is not the faulty module. Do not install a new PSCM as part of the repair for PSCM Diagnostic Trouble Code U0447:00.

DTC Fault Trigger Conditions

Possible Sources

• Sensors and Components Related to the GWM
• GWM

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• The PSCM monitors the HS-CAN when the PSCM voltage is greater than 10 volts and there are no Diagnostic Trouble Codes (DTCs) that inhibit PSCM operation.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test is for PSCM DTC U045A Invalid Data Received From PAM Only. It does not apply to any other module except the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• To direct diagnosis to the module and associated circuit sending erroneous or unknown information in the messages.

Diagnostic Aids

Diagnostic Aids

• For additional information on messages sent to the PSCM from the PAM module, refer to the Network Message Chart in Section 211-02 of the Workshop Manual.
• DTC U045A:00 indicates a concern with the lane information sent from the PAM. The module reporting this DTC is not the faulty module. Do not install a new PSCM as part of the repair for PSCM Diagnostic Trouble Code U045A:00.
• Presence of DTC U045A:00 may prevent the Active Park Assist system from activating. If the DTC sets during an assist event, the event may be terminated and the assist function may be deactivated.

DTC Fault Trigger Conditions

Possible Sources

• HS-CAN concern
• PAM

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• The PSCM monitors the HS-CAN when the PSCM voltage is greater than 10 volts and there are no Diagnostic Trouble Codes (DTCs) that inhibit PSCM operation.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test is for PSCM DTC U053B Invalid Data Received From IPMA Only. It does not apply to any other module except the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• To direct diagnosis to the module and associated circuit sending erroneous or unknown information in the messages.

Diagnostic Aids

Diagnostic Aids

• For more information on messages sent to the PSCM from the IPMA module, refer to the Network Message Chart in Section 211-02 of the Workshop Manual.
• DTC U053B:00 indicates a concern with the lane information sent from the IPMA. The module reporting this DTC is not the faulty module. Do not install a new PSCM as part of the repair for PSCM Diagnostic Trouble Code U053B:00.
• DTC U053B:00 is present. U053B:00 may prevent the use of additional functions; Evasive Steering Assist (ESA) and Lane Center Assist (LCA) from activating. If the DTC sets during an assist event, the assist may be terminated and the assist function may be disabled.

DTC Fault Trigger Conditions

Possible Sources

• HS-CAN concern
• IPMA

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• The PSCM uses a thermistor to monitor the internal temperature of the module. EPAS Mechanism. This DTC, appearing by itself, does not indicate a fault in the steering system. Diagnose all other EPAS diagnostic data. Diagnostic Trouble Codes (DTCs) before diagnosing B1D23:4B.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test applies to the PSCM only, DTC B1D23:4B. It does not apply to any module other than the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list results in a large number of Diagnostic Trouble Codes (DTCs), first diagnose all serious module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network failures (loss of communication or incorrect data). If voltage-related diagnostic trouble codes (DTCs) are present, diagnose them after any serious module faults and before any network failures.

Accurate Test Purpose

Accurate Test Purpose

• This test checks the steering gear and surrounding engine compartment for hot components, missing heat shields, or a damaged steering gear housing creating a hole in the steering gear.

Diagnostic Aids

Diagnostic Aids

• The PSCM reports only DTC B1D23:4B, which does not indicate a fault in the PSCM. It indicates overheating due to environmental conditions or high load on the EPAS system. An example of high load is multiple-point parking maneuvers within a short period of time with low tire pressure, or towing over long distances followed by repeated parking maneuvers.
• The thermistor used by the PSCM is calibrated for 80°C (176°F), and the sensor accuracy decreases at lower ambient temperatures. At room temperature and below, the sensor is accurate to +/- 20°C (68°F).
• The presence of DTC B1D23:4B prevents additional steering functions; Active Park Assist, Lane Keeping Assist (LKA) and Lane Centering Assist (LCA) from activating. If the DTC sets during an assist event, the event is terminated and the assist function is disabled.

DTC Fault Trigger Conditions

Possible Sources

• High steering gear loads
• Excessive ambient temperature
• PSCM

Visual Inspection and Pre-checks

• Refer to Steering GSB for additional guidance on checking connectors and wiring.

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• The PSCM monitors the voltage supplied by the 12-volt battery and charging system, and sets the appropriate DTC if necessary.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test applies to the PSCM only, DTC U3003:16, U3003:17 or U3003:68. It does not apply to any module other than the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list results in a large number of Diagnostic Trouble Codes (DTCs), first diagnose all serious module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network failures (loss of communication or incorrect data). If voltage-related diagnostic trouble codes (DTCs) are present, diagnose them after any serious module faults and before any network failures.

Accurate Test Purpose

Accurate Test Purpose

• This test checks the PSCM fuses in the BJB and the high-current BJB, and verifies the power and ground circuits of the PSCM harness. The test also checks the charging system and the battery state of charge.

Diagnostic Aids

Diagnostic Aids

• In some cases, the message center may display: SERVICE STEERING ASSIST REQUIRED. This does not indicate a PSCM problem if only DTC U3003:XX is present. The 12-volt battery condition should be evaluated.
• A PSCM reporting only DTC U3003:16, U3003:17 or U3003:68 does not indicate a PSCM problem. DO NOT install a new EPAS unit or PSCM if one or more of these DTCs are present.
• The presence of DTC U3003:16, U3003:17, U3003:18 or U3003:68 prevents steering features; Active Park Assist, Lane Keeping Assist (LKA) and Lane Centering Assist (LCA) from activating. If the DTC sets during an assist event, the event is terminated and the assist function is disabled. The presence of one of these DTCs may also result in higher than normal steering effort.
• If DTC U3003:16 is set, the PSCM reduces power steering assist gain to a specified current draw. If EPAS operation exceeds this current limit, the PSCM continues to reduce steering assist until the current draw is below the limit or until assist is completely removed.

DTC Fault Trigger Conditions

Possible Sources

• Fuses
• Wiring, Terminals or Connectors
• Charging System Concern
• 12-Volt Battery
• PSCM

Visual Inspection and Pre-checks

• Make sure that the battery terminals and vehicle cables are free of corrosion and other contamination.
• Make sure that the vehicle battery terminals are tightened to the correct torque.
• Verify that all PSCM fuses in the BJB and the high-current BJB are good.
• Refer to Steering GSB for additional guidance on checking connectors and wiring.

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• When the ignition is turned off, the PSCM remains powered for a short period of time to store data in memory. When the ignition is turned ON, the PSCM retrieves this information, and if the information is missing or corrupted, the DTC is set.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test applies to the PSCM only for DTC U3001:68. This test does not apply to any other module except the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• Verify the presence of PSCM U3001:68 and perform diagnostics if DTC U3001:68 is present and currently active in the PSCM.

DTC Fault Trigger Conditions

Possible Sources

• Fuse(s)
• Wiring, Terminals or Connectors
• 12-Volt Battery
• Charging System

Visual Inspection and Pre-checks

• Make sure that the battery terminals and vehicle cables are free of corrosion and other contamination.
• Make sure that the vehicle battery terminals are tightened to the correct torque.
• Verify that all PSCM fuses in the BJB and the high-current BJB are good.

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• With the ignition on and PSCM supply voltage above 6 volts, the module monitors the motor inside the EPAS column to calculate the relative and actual steering wheel angle. This value is transmitted to other modules via HS-CAN.

Applicability of Precise Test

Applicability of Precise Test

• This test applies to the PSCM only for DTC C1B00:49 or C1B00:62. This test does NOT apply to any other modules or Diagnostic Trouble Codes (DTCs).

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• Verify the PSCM. DTC C1B00:XX is present. Make sure the PSCM module harness and electrical connectors are in good condition.

Diagnostic Aids

Diagnostic Aids

• When DTC C1B00:49 is set, the PSCM disables the steering assist motor, transitions to manual mode, and transmits an incorrect steering wheel angle message over HS-CAN. The module also sends a message to the IPC to display POWER STEERING FAULT in the message center.

DTC Fault Trigger Conditions

Possible Sources

• Internal steering column fault
• Internal PSCM fault

Visual Inspection and Pre-checks

• This DTC is set if the sum of the two steering shaft torque sensors does not equal the specified voltage level. This may occur if the wiring harness is damaged, chafed, or connectors are loose or damaged. An internal fault in the steering column or PSCM may also cause this DTC to set. For more information on DTC setting conditions, refer to the PSCM DTC Chart.
• Refer to Steering GSB for additional guidance on checking connectors and wiring.

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• The PSCM continuously monitors the steering shaft torque sensor when the ignition is on and the sensor supply voltage is between 5.26 and 4.71 volts.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test applies to the PSCM only for DTC C200B, steering shaft torque sensor 1. This does not apply to any other module except the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• Verify the presence of PSCM C200B:XX and perform diagnostics if DTC C200B:XX is present and currently active in the PSCM.

Diagnostic Aids

Diagnostic Aids

• During the ignition cycle in which the DTC is initially set, the PSCM either enters reduced assist mode or steering assist gradually decreases until the PSCM transitions to manual mode.
• During the next ignition cycle after the DTC is set, if the PSCM is not already in manual mode, the PSCM disables the power steering amplifier and enters manual mode. The module also transmits an incorrect steering wheel angle message over HS-CAN and sends a message to the IPC to display STEERING FAULT SERVICE NOW in the message center.

DTC Fault Trigger Conditions

Possible Sources

• Steering shaft torque sensor electrical connector is loose or damaged
• Steering shaft torque sensor wiring is damaged
• Internal steering column fault

Visual Inspection and Pre-checks

• This DTC is set when the steering shaft torque sensor input signal to the PSCM is out of range or does not agree with other PSCM inputs. This is most likely caused by an internal fault in the PSCM. For more information on DTC setting conditions, refer to the PSCM DTC Chart.
• Refer to Steering GSB for additional guidance on checking connectors and wiring.

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• The PSCM continuously monitors the motor position sensor when the ignition is on and the PSCM supply voltage is above 10 volts.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test applies to the PSCM only for DTC C200D, motor position sensor. This does not apply to any other module except the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• Verify the presence of PSCM C200D:xx and perform diagnostics if DTC C200D:xx is present and currently active in the PSCM.

Diagnostic Aids

Diagnostic Aids

• During the ignition cycle in which the DTC is initially set, the PSCM either enters manual mode, reduced assist mode, or steering assist gradually decreases until the PSCM enters manual mode.
• During the next ignition cycle after the DTC is set, if the PSCM is not already in manual mode, the PSCM disables the steering assist motor and transitions to manual mode. The module also transmits an incorrect steering wheel angle message over CAN and sends a message to the IPC to display STEERING FAULT SERVICE REQUIRED in the message center.

DTC Fault Trigger Conditions

Possible Sources

• Internal EPAS Column Malfunction

Normal Operation and Fault Symptoms

Description

Description

• When battery voltage at the PSCM is greater than 10 volts with the ignition on and no Diagnostic Trouble Codes (DTCs) are present, the PSCM performs a self-check of the system software. If a fault is detected, a DTC is set and the EPAS system enters limited operating mode.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test applies to PSCM DTC U2016 Only Main Control Module Software. It does not apply to any module other than the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• Verify that PSCM DTC U2016 is present and perform diagnosis if DTC U2016 is currently active in the PSCM.

Diagnostic Aids

Diagnostic Aids

• During an ignition cycle, DTC U2016:47 is set first, the PSCM either enters fail-safe mode, and steering assist gradually decreases until the PSCM enters manual mode. The PSCM sends a message to the IPC to display STEERING FAULT SERVICE REQUIRED in the message center.

• During the next ignition cycle after DTC U2016:47 is set, if the problem is still present, the PSCM disables the steering power assist and enters manual mode. The module also transmits an incorrect steering angle message over HS-CAN and sends a message to the IPC to display STEERING FAULT SERVICE REQUIRED in the message center.
• If DTC U2016:48 is set, the PSCM remains in normal operating mode, but all steering functions; Active Nibble Control, drift compensation, Evasive Steering Assist (ESA), Lane Departure Warning (LDW), Lane Keeping Aid (LKA) and Lane Centering Assist (LCA) may be disabled.

DTC Fault Trigger Conditions

Possible Sources

• Internal PSCM fault

Visual Inspection and Pre-checks

• This DTC is set when the PSCM internal self-tests detect an internal software error. Refer to the DTC Index for more information, if required.

Normal Operation and Fault Symptoms

REFER TO: Power Steering Amplifier - System Operation and Component Description (211-02 Power Steering Amplifier, Description and Operation).

Description

Description

• When installing a new EPAS gear, the PSCM must be configured with vehicle information. The configuration is verified during initial PSCM power-up (ignition on) when voltage to the PSCM is greater than 10 volts.

Applicability of the Accurate Test

Applicability of the Accurate Test

• This test applies to PSCM Only DTC U2100:00. This test does not apply to any module other than the PSCM.

Diagnostic Trouble Code Strategy

Diagnostic Trouble Code Strategy

• If the module DTC list contains a large number of Diagnostic Trouble Codes (DTCs), first diagnose all major module faults (C102D, C1B00, C200B, C200C, C200D, U2011 and U3000) before diagnosing any network faults (loss of communication or invalid data). If voltage-related DTCs are present, diagnose them after any major module faults and before any network faults. Diagnose all current and active Diagnostic Trouble Codes (DTCs) before diagnosing any historical Diagnostic Trouble Codes (DTCs).

Accurate Test Purpose

Accurate Test Purpose

• Verify PSCM U2100 is present and perform diagnosis if DTC U2100 is present and currently active in the PSCM.

Diagnostic Aids

Diagnostic Aids

• If DTC U2100:00 is present, the steering power assist is configured to a reduced steering assist mode.

DTC Fault Trigger Conditions

Possible Sources

• PSCM not configured
• PSCM configuration not complete