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Pinpoint Test - AM DTC: U3003:16 and U3003:17

WARNING: This page is about a different car, the 2018 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.

Refer to Supplemental Restraint System for schematic and connector information.

NOTE: Diagnostic Trouble Codes (DTCs) U3003:16 and U3003:17 can be set if the vehicle has been recently jump started, the battery has been recently charged or the battery has been discharged. The battery may become discharged due to excessive load(s) on the charging system from aftermarket accessories or if the battery has been left unattended with the accessories on.

Normal Operation - RCM 

The RCM continuously monitors the input voltage for correct operation. If the RCM detects input voltage below 9.0 volts when another RCM fault is present, or below 6 volts, whether or not a fault is present, it stores DTC U3003:16 in memory. If the RCM detects input voltage above 16 volts while a fault is 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 correct operation. If the OCSM detects input voltage below 8 volts, it stores DTC U3003:16 in memory. If the OCSM detects 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 

DTC Description Fault Trigger Conditions
U3003:16 Battery Voltage: Circuit Voltage Below Threshold This DTC sets if the RCM detects voltage below 9 volts when a SRS fault is present or below 6.0 volts, with or without a fault present.
U3003:17 Battery Voltage: Circuit Voltage Above Threshold This DTC sets if the RCM detects voltage above 16 volts with a SRS fault or above 18 volts without a SRS fault.
U3003:16 Battery Voltage: Circuit Voltage Below Threshold This DTC sets if the OCSM detects voltage below 8 volts.
U3003:17 Battery Voltage: Circuit Voltage Above Threshold This DTC sets if the OCSM detects voltage above 18 volts.

Visual Inspection and Diagnostic Pre-checks 

Possible Sources 

PINPOINT TEST A : U3003:16 AND U3003:17 

  1. WARNING: Incorrect repair techniques or actions can cause an accidental Supplemental Restraint System (SRS) deployment. Never compromise or depart from these instructions. Failure to precisely follow all instructions could result in serious personal injury from an accidental deployment.
  2. NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
  3. NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
  4. NOTE: Only disconnect or reconnect SRS components when instructed to do so within a pinpoint test step. Failure to follow this instruction may result in incorrect diagnosis of the SRS.
  5. NOTE: Install new components only when directed to do so in the pinpoint test.
  6. NOTE: Always make sure the correct SRS component is being installed. Parts released for other vehicles may not be compatible even if they appear physically similar. Check the part number listed in the Ford parts catalog to make sure the correct component is being installed. If an incorrect SRS component is installed, Diagnostic Trouble Codes (DTCs) may set.
  7. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.

    8. PINPOINT TEST A U3003:16 and U3003:17 

  8. A1 RETRIEVE ALL CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS) IN ALL MODULES

    WARNING: Before beginning any service procedure in this article, refer to Safety Warnings in GENERAL INFORMATION (EXCEPT ELECTRIC) . Failure to follow this instruction may result in serious personal injury.

    • Ignition ON.

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

    Is 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 PCM? 

    Yes  DIAGNOSE the charging system. Refer to the appropriate charging system article for the procedure.
    No  GO to  A2

  9. A2 TEST BATTERY CONDITION

    • Ignition OFF.

    • Carry out the Battery Condition Test. REFER to: Battery .

    Did the battery pass the condition test? 

    Yes  If the battery passed the condition test but required a recharge, DIAGNOSE the charging system. Refer to the appropriate battery and charging system article for the procedure. CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs). If the battery passed the condition test and did not require a recharge, GO to  A3
    No  INSTALL a new battery. REFER to: Battery . CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

  10. A3 CHECK THE CHARGING SYSTEM VOLTAGE

    NOTE: Do not allow the engine speed to increase above 2, 000 RPM while performing this step or the generator may self excite and result in default charging system output voltage. If engine speed goes above 2, 000 RPM, shut the vehicle OFF and restart the engine before performing this step.

    • Start the engine.

    • Measure the voltage of the battery.

    • For DTC U3003:17, turn off all accessories and run the engine at 1, 500 RPM for a minimum of 2 minutes while measuring the battery voltage.

    • For DTC U3003:16, turn on headlights and HVAC fan on high and run engine at 1, 500 RPM for a minimum of 2 minutes 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  DIAGNOSE the charging system. Refer to the appropriate charging system article for the procedure. CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

  11. A4 CHECK FOR OPEN IGNITION CIRCUIT TO THE MODULE

    • Ignition OFF.

    • Disconnect the module with the concern:

      • For the OCSM, disconnect C3159 .

    • For the RCM, measure:
      Positive Lead Measurement / Action Negative Lead
      C310A-19
      GFD264469Courtesy of FORD MOTOR COMPANY
      		 C2280F-4

    • For the OCSM, measure:
      Positive Lead Measurement / Action Negative Lead
      C3159-1
      GFD264469Courtesy of FORD MOTOR COMPANY
      		 C2280F-4

    Is the resistance less than 1 ohm? 

    Yes  GO to  A5
    No  REPAIR the circuit as necessary. Refer to Connector Repair Procedures for schematic and connector information. CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

  12. A5 CHECK FOR OPEN GROUND TO THE MODULE

    • For the RCM and 

      OCSM, measure:

      Positive Lead Measurement / Action Negative Lead
      RCM mounting bracket
      GFD264469Courtesy of FORD MOTOR COMPANY
      		 Ground

    • For the OCSM only, measure:
      Positive Lead Measurement / Action Negative Lead
      C3159-4
      GFD264469Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance less than 1 ohm? 

    Yes  GO to  A6
    No  For the RCM and OCSM, VERIFY there is no corrosion between the RCM and the mounting surface. VERIFY the fasteners are clean and tightened to specification with no corrosion. REPAIR as necessary. Refer to Connector Repair Procedures for schematic and connector information. For the OCSM, REPAIR the circuit. Refer to Connector Repair Procedures for schematic and connector information. CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

  13. A6 CHECK FOR MODULE OPERATION

    WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.

    • Ignition OFF.

    • Disconnect the module with the concern:

      • For the RCM, disconnect C310A and C310B (if not previously disconnected).
      • For the OCSM, disconnect OCSM C3159 (if not previously disconnected).

    • Check for the following:

      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary

    • Connect the module with the concern:

      • For the RCM, connect C310A and C310B . Make sure the connector seats correctly and engages the Connector Position Assurance (CPA) lever/lock.
      • For the OCSM, connect C3159 . Make sure the connector seats correctly.

    • Operate the system and verify 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, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, and DTC U3003:16 or U3003:17 was present in the RCM, INSTALL a new RCM. REFER to: Restraints Control Module (RCM)  . If no Technical Service Bulletins (TSBs) address this concern, and DTC U3003:16 or U3003:17 was present in the OCSM, INSTALL a new OCSM. REFER to: Occupant Classification System (OCS) Sensor  .
    No  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs).
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