Ford Explorer Quiz
Electrical

Diagnosis and Testing - Cruise Control

In this manual: Electrical
General Information — 41Chassis — 173Powertrain — 250Electrical — 303Body and Paint — 331
~12min read

Diagnostic Trouble Code (DTC) Chart

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).


Diagnostic Trouble Code Chart


Module Trouble Code Description Action
PCM P0504:00 Brake Switch: Correlation A / B GO to Pinpoint Test B
PCM P0572:00 Brake Switch A: Circuit Low GO to Pinpoint Test B
PCM P0573:00 Brake Switch A: Signal High GO to Pinpoint Test B
PCM P1703:00 Brake Switch: Out of Self-Test Range GO to Pinpoint Test B
PCM P1935:00 Brake Switch: Sensor Signal GO to Pinpoint Test B
SCCM B137F: 11 Left Steering Wheel Switch Pack: Short to Ground GO to Pinpoint Test A
SCCM B137F: 13 Left Steering Wheel Switch Pack: Open Circuit GO to Pinpoint Test A
SCCM B137F: 96 Left Steering Wheel Switch Pack: Internal Component Failure GO to Pinpoint Test A
SCCM B137F: 9E Left Steering Wheel Switch Pack: Stuck On GO to Pinpoint Test A

Symptom Chart

Symptom Chart: Cruise Control

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).


Symptom Chart


Condition Possible Sources Action
Cruise Control Inoperative Refer to Pinpoint Test GO to Pinpoint Test A
The cruise control indicator lamp never illuminates / is always illuminated
  • Wiring, Terminals and Connectors
  • PCM
  • PCM
REFER TO: Instrument Cluster, Message Center and Warning Chimes (413-01 Instrument Cluster, Message Center and Warning Chimes, Diagnosis and Testing).
Cruise Control Switch Inoperative/Incorrect Operation Refer to Pinpoint Test GO to Pinpoint Test A
Cruise control cannot set above 105 km/h, 113 km/h, 121 km/h or 129 km/h The MyKey® Restricted Driver key is in use and the MyKey® maximum speed restriction is enabled. CHECK that the MyKey® Restricted Driver key is in use. With the Admin key, CHECK whether the MyKey® maximum speed restriction is enabled. REFER to the Owner's Literature. If necessary, CHECK cruise control normal operation with the Admin key.

Pinpoint Tests


PINPOINT TEST A: CRUISE CONTROL INOPERATIVE

For wiring diagrams and connector information, refer to Section 31 of the wiring diagrams.

Normal Operation and Fault Symptoms

Refer to: Cruise Control - System Operation and Component Description (419-03A Cruise Control, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
SCCM B137F:11 Left Steering Wheel Switch Pack: Short to Ground Continuous DTC that sets when the cruise control switch circuits are shorted to ground.
SCCM B137F: 13 Left Steering Wheel Switch Pack: Open Circuit Continuous DTC that sets when the cruise control switch circuits are open.
SCCM B137F: 96 Left Steering Wheel Switch Pack: Internal Component Failure Continuous DTC that sets when the measured cruise control circuit input voltage is not within the acceptable range.
SCCM B137F: 9E Left Steering Wheel Switch Pack: Stuck On Continuous DTC that sets when the cruise control switch is pressed and held for more than 120 seconds.

Possible Sources

  • Wiring, Terminals or Connectors
  • Cruise control switch
  • TP sensor
  • PCM
  • SCCM
  • BPP switch
A1 CHECK THE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, perform a PCM self-test.
  • Using the diagnostic scan tool, perform the SCCM self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes If PCM diagnostic trouble codes (DTCs) were retrieved, GO to the PCM DTC chart.
If TR diagnostic trouble codes (DTCs) were retrieved, REFER to the appropriate section in Group 307 for procedure information.
If SCCM diagnostic trouble codes (DTCs) B137F:11, B137F:13, B137F:96 or B137F:9E were retrieved, GO to A3. For all other SCCM diagnostic trouble codes (DTCs):
REFER to: Steering Wheel and Column Electrical Components (211-05 Steering Wheel and Column Electrical Components, Diagnosis and Testing).
No GO to A2
A2 CHECK THE STOP LAMP SWITCH (BOO1) AND CRUISE CONTROL CANCEL SWITCH (BOO2) PARAMETER IDENTIFICATION (PIDS)
  • Using a diagnostic scan tool, view the PCM Parameter Identifications (PIDs).
  • Using the table,

    Access the PCM and monitor the BU1 (0) PID

    and

    Access the PCM and monitor the BOO2 (0) PID

    while pressing and releasing the brake pedal.
    Brake pedal position BOO1 PID BOO2 PID
    Released Off Off
    Applied On On

Do the PID values match the brake pedal position?
Yes GO to A3
No GO to Pinpoint Test B
A3 CHECK THE CRUISE CONTROL SWITCH PID PARAMETER IDENTIFICATION (PID) VALUES
  • Using the diagnostic scan tool, view the SCCM Parameter Identifications (PIDs).
  • Using the table, press each cruise control switch while monitoring the cruise control switch PID.
    Cruise control switch PID value
    Cruise On (pressed/released) ON OFF
    Cruise Off (pressed/released) ON OFF
    Resume (pressed/released) ON OFF
    Cancel (pressed/released) ON OFF
    SET + (pressed/released) ON OFF
    SET - (pressed/released) ON OFF

Do the PID values match the switch position?
Yes GO to A8
No If only one switch does not show the correct PID value, INSTALL a new left steering wheel switch.
REFER to: Steering Wheel Multifunction Switch (211-05 Steering Wheel and Column Electrical Components, Removal and Installation). If multiple switches do not display the correct PID value, GO to A4.
A4 CHECK THE VOLTAGE AT THE CRUISE CONTROL SWITCHES
  • Ignition OFF.
  • Remove the driver air bag.
    REFER to: Driver Air Bag (501-20B Supplemental Restraint System, Removal and Installation).
  • Disconnect the Left Steering Wheel Switch C2998.
  • The ignition is on.
  • Action:
    Positive lead Measurement/Action Negative lead
    C2998-2 C2998-5
    C2998-3 C2998-5
    C2998-4 C2998-5

Is the voltage approximately 5 volts?
Yes INSTALL a new left steering wheel switch.
REFER to: Steering Wheel Multifunction Switch (211-05 Steering Wheel and Column Electrical Components, Removal and Installation). INSTALL the driver air bag.
REFER to: Driver Air Bag (501-20B Supplemental Restraint System, Removal and Installation).
No GO to A5
A5 CHECK THE STEERING WHEEL SWITCH WIRING HARNESS FOR AN OPEN CIRCUIT
  • Ignition OFF.
  • Disconnect the clockspring C218B.
  • Action:
    Positive lead Measurement/Action Negative lead
    C2998-2 C218B-7
    C2998-3 C218B-8
    C2998-4 C218B-10
    C2998-5 C218B-9

Is the resistance less than 3 ohms?
Yes GO to A6
No Install a new steering wheel.
REFER to: Steering Wheel (211-04 Steering Column, Removal and Installation).
A6 CHECK THE STEERING WHEEL SWITCH CIRCUITS THROUGH THE CLOCKSPRING FOR AN OPEN CIRCUIT
  • Disconnect the clockspring C218F.
  • Action:
    Positive lead Measurement/Action Negative lead
    C218B-7 (component side) C218F-1 (component side)
    C218B-8 (component side) C218F-2 (component side)
    C218B-10 (component side) C218F-4 (component side)
    C218B-9 (component side) C218F-3 (component side)

Is the resistance less than 3 ohms?
Yes GO to A7
No Install a new clockspring.
REFER to: Clockspring (501-20B Supplemental Restraint System, Removal and Installation).
A7 CHECK THE SCCM (STEERING COLUMN CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all SCCM connectors.
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent terminals/pins - install new terminals/pins
    • pushed-out pins - install new pins as necessary
  • Reconnect the SCCM connectors. Make sure they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service information: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service article exists, INSTALL a new SCCM.
REFER TO: Steering Column Control Module (SCCM) (211-05 Steering Wheel and Column Electrical Components, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
A8 CHECK THE PCM (POWERTRAIN CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all PCM connectors.
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent terminals/pins - install new terminals/pins
    • pushed-out pins - install new pins as necessary
  • Connect the PCM connectors. Make sure they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service article exists for this concern,
Click here to access the guided routine (PCM). Internet Explorer version 11 or later is required to perform this Pinpoint test.
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST B: P0504:00, P0572:00, P0573:00 OR P1703:00

For wiring diagrams and connector information, refer to Section 31 of the wiring diagrams.

Normal Operation and Fault Symptoms

Refer to: Cruise Control - System Operation and Component Description (419-03A Cruise Control, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PCM P0504:00 Brake Switch A/B Correlation: no subtype information This DTC sets when the PCM does not detect the correct brake switch input sequence from both the cruise control cancel switch and the stop lamp switches when the brake pedal is applied and released.
PCM P0572:00 Brake Switch "A" Circuit Low: No Sub-type Information This DTC sets when the PCM detects an open circuit in the stop lamp switch signal. The PCM monitors vehicle speed, engine speed, engine torque and stop lamp input during start and stop cycles. If the stop lamp switch input to the PCM is always off during start and stop cycles.
PCM P0573:00 Brake Switch "A" Circuit High: No Sub-type Information This DTC is set when the PCM detects a short to battery voltage on the brake switch signal circuit. The PCM monitors vehicle speed, engine speed, engine torque and the brake switch input during start and stop cycles. If the brake switch input to the PCM is always on during start and stop cycles.
PCM P1703:00 Brake switch out of self-test range: no sub-type information This DTC is set in the engine control module during self-test when the brake switch input signal is high or does not switch between high and low.
PCM P1935:00 Brake switch/sensor signal: no sub-type information This DTC sets when the PCM does not receive a brake switch input signal to disengage cruise control.

Possible Sources

  • Wiring, Terminals or Connectors
  • Stop Lamp Switch
  • PCM
NOTICE: Use the correct probe adapter(s) when making measurements. Using incorrect probe adapter(s) may damage the connector.
B1 CHECK STOP LAMP OPERATION
  • The ignition is on.
  • Depress the brake pedal and observe the stop lamps.

Do the stop lamps and high mounted stop lamp operate correctly?
Yes GO to B2
No
Refer to: Stop Lamps (417-01 Exterior Lighting, Diagnosis and Testing).
B2 CHECK BRAKE SWITCH (BOO1) AND CRUISE CONTROL DEACTIVATION SWITCH (BOO2) PID IDENTIFICATION (PIDS)
  • Using a diagnostic scan tool, view the PCM Parameter Identifications (PIDs).
  • Using the table,

    Access the PCM and monitor the BU1 (0) PID

    and

    Access the PCM and monitor the BOO2 (0) PID

    while pressing and releasing the brake pedal.
    Brake pedal position BOO1 PID BOO2 PID
    Released Off Off
    Applicable firmly On On

Do the PID values match the brake pedal position?
Yes GO to B8
No If the PID BOO1 value is incorrect, GO to B3.
If the PID BOO2 value is incorrect, GO to B4.
B3 CHECK BRAKE SWITCH CIRCUIT
  • Ignition OFF.
  • Disconnect PCM C1381B 2.3 L.
  • Disconnect PCM C1551B 3 L.
  • Disconnect PCM C175B 3.3 L.
  • The ignition is on.
  • While depressing and releasing the brake pedal, measure:

    2.3 L EcoBoost


    Positive lead Measurement/Action Negative lead
    C1381B-10 Ground

    3 L EcoBoost


    Positive lead Measurement/Action Negative lead
    C1551B-8 Ground

    3.3 L Duratec


    Positive lead Measurement/Action Negative lead
    C175B-8 Ground

Is the voltage greater than 11 V with the brake pedal depressed and 0 V with the brake pedal released?
Yes GO to B8
No REPAIR the circuit.
B4 CHECK CRUISE CONTROL DEACTIVATION SWITCH OPERATION
  • Ignition OFF.
  • Disconnect PCM C1381B 2.3 L.
  • Disconnect PCM C1551B 3 L.
  • Disconnect PCM C175B 3.3 L.
  • Firmly depress and release the brake pedal, measure:

    2.3 L EcoBoost


    Positive lead Measurement/Action Negative lead
    C1381B-11 Ground

    3 L EcoBoost


    Positive lead Measurement/Action Negative lead
    C1551B-23 Ground

    3.3 L Duratec


    Positive lead Measurement/Action Negative lead
    C175B-23 Ground

Is the resistance less than 3 ohms with the brake pedal released and greater than 10,000 ohms with the brake pedal depressed?
Yes GO to B8
No GO to B5
B5 CHECK CRUISE CONTROL DEACTIVATION SWITCH GROUND CIRCUIT FOR OPEN
  • Disconnect the BPP switch C278.
  • Action:
    Positive lead Measurement/Action Negative lead
    C278-3 Ground

Is the resistance less than 3 ohms?
Yes GO to B6
No REPAIR the circuit.
B6 CHECK CRUISE CONTROL DEACTIVATION SWITCH SIGNAL CIRCUIT FOR SHORT TO GROUND
  • Action:
    Positive lead Measurement/Action Negative lead
    C278-2 Ground

Is the resistance greater than 10000 Ohms?
Yes GO to B7
No REPAIR the circuit.
B7 CHECK CRUISE CONTROL DEACTIVATION SWITCH SIGNAL CIRCUIT FOR OPEN
  • Connect the fused jumper:
    Positive lead Measurement/Action Negative lead
    C278-2 C278-3
  • Action:

    2.3 L EcoBoost


    Positive lead Measurement/Action Negative lead
    C1381B-11 Ground

    3 L EcoBoost


    Positive lead Measurement/Action Negative lead
    C1551B-23 Ground

    3.3 L Duratec


    Positive lead Measurement/Action Negative lead
    C175B-23 Ground

Is the resistance less than 3 ohms?
Yes INSTALL a new BPP switch.
REFER TO: Brake Pedal Position Switch (417-01 Exterior Lighting, Removal and Installation).
No REPAIR the signal circuit for an open.
B8 CHECK PCM (POWERTRAIN CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all PCM connectors.
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent terminals/pins - install new terminals/pins
    • pushed-out pins - install new pins as necessary
  • Connect the PCM connectors. Make sure they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service article exists for this concern,
Click here to access the guided routine (PCM). Internet Explorer version 11 or later is required to perform this Pinpoint test.
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

Test yourself

A quick Ford Explorer quiz: every answer comes with an explanation and a link to the manual page.