Ford Fiesta Quiz
Body and Paint

Pinpoint Test - DTC: FF. Diagnosis and Testing

In this manual: Body and Paint
Service Information — 27Suspension — 48Transmission — 9Brake System — 52Steering — 21Engine — 140Manual Transmission, Clutch, Transfer Case and Power Transfer Unit — 48Exhaust System — 6Fuel System — 21Climate Control System — 58Instrumentation and Warning Systems — 26Battery and Charging System — 20Infotainment Systems — 41Lighting — 29Power Distribution — 11Electronic Function Group — 30Body and Paint — 275Frame and Mounting — 3
~8min read

U3003:16 and U3003:17


For circuit and connector information, refer to Wiring Diagrams Cell 46.

Normal Operation - RCM

The RCM module continuously monitors the input voltage for proper operation. If the RCM detects an input voltage below 9.5 volts with a fault present, or below 8.0 volts regardless of whether a fault is present, it stores DTC U3003:16 in memory. If the RCM detects an input voltage above 16 volts with a fault present, or above 18 volts regardless of fault status, it stores DTC U3003:17 in memory. If the RCM sets DTC U3003:16 or U3003:17, it sends a message to the IPC to illuminate the airbag warning indicator.

Normal Operation - OCSM

The OCSM continuously monitors the input voltage for proper operation. If the OCSM detects an input voltage below 8 volts, it stores DTC U3003:16 in memory. If the OCSM detects an input voltage above 18 volts, it stores DTC U3003:17 in memory. If the OCSM sets DTC U3003:16 or U3003:17, it sends a fault message to the RCM. The RCM then sends a message to the IPC to illuminate the airbag warning indicator.


DTC Fault Trigger Conditions


Trouble Code Description Fault Trigger Conditions
U3003:16 Battery Voltage: Circuit Voltage Below Threshold This DTC is set if the RCM module detects a voltage below 9.5 volts with an SRS fault present, or below 8 volts regardless of whether an SRS fault is present.
U3003:17 Battery Voltage: Circuit Voltage Above Threshold This DTC is set if the RCM detects a voltage above 16 volts with an SRS fault present, or above 18 volts without an SRS fault present.
U3003:16 Battery Voltage: Circuit Voltage Below Threshold This DTC is set if the OCSM detects a voltage below 8 volts.
U3003:17 Battery Voltage: Circuit Voltage Above Threshold This DTC is set if the OCSM detects a voltage above 18 volts.

Possible Causes

  • Wiring, Terminals or Connectors
  • OCSM
  • RCM

Visual Inspection and Preliminary Diagnosis

  • Inspect the wiring harness for damage.
  • Inspect the connectors for loose or damaged terminals.

PINPOINT TEST A: U3003:16 AND U3003:17
NOTE: Most concerns are related to connector and/or wiring issues. Perform a thorough inspection and check before proceeding to the Pinpoint Test.
NOTE: Only disconnect or reconnect SRS components when instructed to do so in the Pinpoint Test step. Failure to follow this instruction may result in an incorrect SRS diagnosis.
NOTE: Install new components only if directed by the pinpoint test.
NOTE: Always verify the correct SRS component is installed. Parts released for other vehicles may be incompatible even if they appear physically similar. Check the part number listed in the Ford parts catalog to confirm the correct component is installed. If an incorrect SRS component is installed, diagnostic trouble codes (DTCs) may be set.
NOTE: Before returning the vehicle to the customer, the SRS must be fully functional and operating correctly.
A1 RETRIEVE ALL CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS) FROM ALL MODULES

  • REFER TO: Pyrotechnic Device Handling Precautions (100-00 General Information, Description and Operation).
  • The ignition is on.
  • Using the diagnostic scan tool, retrieve ALL continuous memory diagnostic trouble codes (CMDTCs).

Are DTC B1317, B1318, B1676, U3003:16 or U3003:17 present in one or more modules AND are any charging system diagnostic trouble codes (DTCs) present in the RCM?
Yes CHECK the charging system.
REFER TO: Charging System - 1.6 L EcoBoost (132 kW/180 L hp) - Sigma (414-00 Charging System, General Information, Diagnosis and Testing).
REFER TO: Charging System - 1.6 L Duratec-16V Ti-VCT (88 kW/120 L hp) - Sigma (414-00 Charging System, General Information, Diagnosis and Testing).
No GO to A2
A2 CHECK THE BATTERY CONDITION
  • Ignition OFF.
  • Perform the battery state of health test.
    REFER TO: Battery (414-01 Battery, Mounting and Cables, Diagnosis and Testing).

Did the battery pass the condition check?
Yes If the battery passes the condition test but requires charging, CHECK the charging system.
REFER TO: Charging System - 1.6 L EcoBoost (132 kW/180 L hp) - Sigma (414-00 Charging System, General Information, Diagnosis and Testing).
REFER TO: Charging System - 1.6 L Duratec-16V Ti-VCT (88 kW/120 L hp) - Sigma (414-00 Charging System, General Information, Diagnosis and Testing).
CLEAR all continuous memory diagnostic trouble codes (CMDTCs).
If the battery passes the condition test and does not require charging, GO to A3.
No INSTALL a new battery.
SEE: Battery (414-01 Battery, Mounting and Cables, Removal and Installation).
CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs).
A3 CHECK THE CHARGING SYSTEM VOLTAGE
  • Start the engine.
  • Measure the battery voltage.
  • For DTC U3003:17, turn off all accessories while measuring the battery voltage.
  • For DTC U3003:16, turn on the headlamps and the heating, ventilation and air conditioning (HVAC) blower fan on high while measuring the battery voltage.

Is the voltage between 13 and 15.2 volts?
Yes For DTC U3003:16, GO to A4.
For DTC U3003:17, GO to A6.
No CHECK the charging system.
REFER TO: Charging System - 1.6 L EcoBoost (132 kW/180 L hp) - Sigma (414-00 Charging System, General Information, Diagnosis and Testing).
REFER TO: Charging System - 1.6 L Duratec-16V Ti-VCT (88 kW/120 L hp) - Sigma (414-00 Charging System, General Information, Diagnosis and Testing).
CLEAR all continuous memory diagnostic trouble codes (CMDTCs).
A4 CHECK THE IGNITION COIL CIRCUIT FOR OPEN TO THE MODULE
  • Ignition OFF.
  • De-energize the SRS. Refer to
    REFER TO: Supplemental Restraint System (SRS) Disabling and Re-enabling (501-20B Supplemental Restraint System, General Procedures).
  • Disconnect the faulty module:
    • For the RCM, disconnect C310A and C310B.
    • For the OCSM, disconnect C3159.
  • For the RCM, measure:
    Click to display connectors
    Positive lead Measurement/Action Negative lead
    C310A-19 Fuse CJB 20 (10A)
  • For the OCSM, measure:
    Click to display connectors
    Positive lead Measurement/Action Negative lead
    C3159-1 Fuse CJB 4 (7.5A)

Is the resistance less than 1 Ohm?
Yes GO to A5
No REPAIR the circuit as necessary.
For circuit and connector information, refer to Wiring Diagrams Cell 5.
CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs).
A5 CHECK FOR OPEN IN MODULE GROUND
  • For the RCM, measure:
    Click to display connectors
    Positive lead Measurement/Action Negative lead
    RCM Mounting Bracket Ground
  • For the OCSM, measure:
    Click to display connectors
    Positive lead Measurement/Action Negative lead
    C3159-4 Ground

Is the resistance less than 1 Ohm?
Yes GO to A6
No For the RCM: ENSURE there is no corrosion between the RCM and the mounting surface. ENSURE the mounting fasteners are clean, tightened to specification and free of corrosion. REPAIR as necessary.
For wiring diagrams and connector information, refer to Wiring Diagrams Cell 5. For the OCSM: REPAIR the circuit.
For wiring diagrams and connector information, refer to Wiring Diagrams Cell 5.
CLEAR all Continuous Monitor Diagnostic Trouble Codes (CMDTCs).
A6 CHECK MODULE OPERATION
  • Ignition OFF.
  • De-power the SRS.
    REFER to: Supplemental Restraint System (SRS) Disabling and Re-enabling (501-20B Supplemental Restraint System, General Procedures).
  • Disconnect the faulty module:
    • For the RCM, disconnect C310A and C310B (if not previously disconnected).
    • For the OCSM, disconnect C3159 (if not previously disconnected).
  • Check the following:
    • 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 faulty module:
    • For RCM, connect C310A and C310B. Make sure the connector is fully seated and engages the connector position assurance (CPA) lever/lock.
    • For the OCSM, connect C3159. Make sure the connector is fully seated.
  • Reset the SRS. Do not check the SRS at this time.
    REFER TO: Supplemental Restraint System (SRS) Disarming and Rearming (501-20B Supplemental Restraint System, General Procedures).
  • Operate the system and verify that the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions.
If no TSB applies to this concern, and DTC U3003:16 or U3003:17 is present in the RCM, INSTALL a new RCM. REFER TO
Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation). If no TSB applies to this concern, and DTC U3003:16 or U3003:17 is present in the OCSM, INSTALL a new OCSM.
Occupant Classification Sensor (OCS) (501-20B Supplemental Restraint System, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by a loose or corroded connector. Clear all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

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