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

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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 while a fault is present, or below 6.0 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 with a SRS fault or below 6 volts, whether or not a SRS fault exists.
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.

Possible Sources 

Visual Inspection and Diagnostic Pre-checks 

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 be. Fore 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 be. Fore releasing the vehicle to the customer.

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

    WARNING: Be. Fore beginning any service procedure in this article, refer to Health and Safety Precautions . 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). Record any Diagnostic Trouble Codes that are retrieved.

    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 Battery and Charging System article for the procedure.
    No  GO to  A2

  9. A2 CHECK. For BECMB (EXTENDED POWER MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

    • Review the Diagnostic Trouble Codes (DTCs) recorded in the previous step.

    Were any BECMB Diagnostic Trouble Codes (DTCs) retrieved and recorded? 

    Yes  DIAGNOSE the BECMB Diagnostic Trouble Codes (DTCs). REFER to DTC Chart: Extended Power Module [BECM-B] .
    No  GO to  A3

  10. A3 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  A4
    No  INSTALL a new battery. REFER to: Battery . CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

  11. A4 CHECK THE CHARGING SYSTEM VOLTAGE

    • Start the engine.

    • Measure the voltage of the battery.

    • For DTC U3003:17, turn off all accessories while measuring the battery voltage.

    • For DTC U3003:16, turn on headlights and HVAC fan on high while measuring the battery voltage.

    Is the voltage between 13 and 15.2 volts? 

    Yes  For DTC U3003:16, GO to  A5. For DTC U3003:17, GO to  A7
    No  DIAGNOSE the charging system. Refer to the appropriate Supplemental Restraint System. For the procedure. CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

  12. A5 CHECK. For HIGH RESISTANCE IN THE IGNITION CIRCUIT TO THE MODULE

    • Ignition OFF.

    • Disconnect BECMB C3733 .

    • Disconnect the module with the concern:

      • For the OCSM, disconnect C3159 .

    • For the RCM, measure:
      Positive Lead Measurement / Action Negative Lead
      C310A-19
      GFD230312Courtesy of FORD MOTOR COMPANY
      		 C3733-3

    • For the OCSM, measure:
      Positive Lead Measurement / Action Negative Lead
      C3159-1
      GFD230312Courtesy of FORD MOTOR COMPANY
      		 C3733-9

    Is the resistance less than 1 ohm? 

    Yes  GO to  A6
    No  REPAIR the circuit as necessary. REFER to Connector Repair Procedures . For schematic and connector Information. CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

  13. A6 CHECK. For HIGH RESISTANCE IN THE MODULE GROUND CIRCUIT

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3733-1
      GFD230312Courtesy of FORD MOTOR COMPANY
      		 Ground

    • For the RCM, measure:
      Positive Lead Measurement / Action Negative Lead
      RCM mounting bracket
      GFD230312Courtesy of FORD MOTOR COMPANY
      		 Ground

    • For the OCSM, measure:
      Positive Lead Measurement / Action Negative Lead
      C3159-4
      GFD230312Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance less than 1 ohm? 

    Yes  GO to  A7
    No  For the RCM, 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).

  14. A7 CHECK. For MODULE OPERATION

    • 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.

    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.
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