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Home >> Audi >> 2010 >> A4 2.0T >> Repair and Diagnosis >> External Pages >> Different car >> Section 687 (Supplemental Restraint System) >> Diagnosis And Testing >> Airbag and Safety Belt Pretensioner Supplemental Restraint System (SRS) >> Pinpoint Test >> PINPOINT TEST K : DTCs B1404:11, B1404:12, B1404:13 AND B1404:1A >> PINPOINT TEST K : DTCs B1404:11, B1404:12, B1404:13 AND B1404:1A

PINPOINT TEST K : DTCs B1404:11, B1404:12, B1404:13 AND B1404:1A

WARNING: This page is about a different car, the 2016 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
  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) from the Flex Probe Kit when taking measurements. Failure to use the correct probe adapter(s) may damage 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: 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, DTCs may set.
  6. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.

  7. K1 RETRIEVE RCM DTCs

    • WARNING: Before beginning any service procedure, refer to Safety Warnings in Service Information

      REFER to Safety Belt and SRS Health and Safety Precautions in Description and Operation in Service Information .

    • Ignition ON.
    • Using a diagnostic scan tool, perform RCM self-test.

    Was DTC B1404:11, B1404:12, B1404:13 or B1404:1A retrieved on-demand during self-test? 

    Yes  This fault cannot be cleared until it is corrected and the DTC is no longer retrieved on-demand during self-test. For DTC B1404:13 or B1404:1A, GO to  K2. For DTC B1404:11, GO to  K8. For DTC B1404:12, GO to  K10.
    No  This is an intermittent fault when present as a CMDTC only. For DTC B1404:13 or B1404:1A, GO to  K13. For DTC B1404:11, GO to  K14. For DTC B1404:12, GO to  K15.

  8. K2 CHECK THE DRIVER SIDE AIRBAG DEPLOYMENT CONTROL RESISTANCE (DEPLOY_10_R) PID

    • Using a diagnostic scan tool, view RCM PIDs.
    • Monitor and record the resistance value displayed by the DEPLOY_10_R PID.

    Does the PID value read between 1.44 and 3.52 ohms? 

    Yes  GO to  K12.
    No  GO to  K3.

  9. K3 CHECK THE DRIVER SIDE AIRBAG DEPLOYMENT CONTROL RESISTANCE (DEPLOY_10_R) PID WHILE CARRYING OUT THE HARNESS TEST

    • While monitoring the DEPLOY_10_R PID, carry out the harness test of the driver side airbag circuits and accessible connectors (including any inline connectors) by wiggling connectors and flexing the wire harness frequently. Record the resistance value indicated by the PID.

    Does the PID value read between 1.44 and 3.52 ohms while carrying out the harness test? 

    Yes  DEPOWER the SRS and REPAIR the connector, terminals or wire harness as needed. Refer to Connector Repair Procedures , for schematic and connector information. Go to  K17.
    No  For PID value less than 1.44 ohms, GO to  K4. For PID value greater than 3.52 ohms, GO to  K6.

  10. K4 CHECK THE DRIVER SIDE AIRBAG DEPLOYMENT CONTROL DTC FOR A FAULT STATUS CHANGE (LOW RESISTANCE INDICATED)

    NOTE: This pinpoint test step attempts to change the fault reported by the RCM by inducing a different fault condition. If the reported fault changes, this indicates the RCM is functioning correctly and is not the source of the fault.

    • Ignition OFF.
    • Disconnect Driver Side Airbag (Inline) C3051 .
    • Ignition ON.
    • Using a diagnostic scan tool, perform RCM self-test.
    • DIAGNOSTIC TIP:  When viewing DTCs with the driver side airbag disconnected, an open circuit fault is normally retrieved.

    Did the on-demand DTC change from B1404:1A to B1404:13? 

    Yes  GO to  K11.
    No  GO to  K5.

  11. K5 CHECK FOR A SHORT BETWEEN DRIVER SIDE AIRBAG CIRCUITS

    • Ignition OFF.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3051-1
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C3051-2

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  K12.
    No  REPAIR the circuits. Refer to Connector Repair Procedures for schematic and connector information. Go to  K17.

  12. K6 CHECK THE DRIVER SIDE AIRBAG CIRCUITS FOR AN OPEN

    • Ignition OFF.
    • Driver Side Airbag (Inline) C3051 .
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C310B-40
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C3051-1
      C310B-39
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C3051-2

    Are the resistances less than 0.5 ohm? 

    Yes  GO to  K7.
    No  REPAIR the affected circuit. Refer to Connector Repair Procedures for schematic and connector information. Go to  K17.

  13. K7 CHECK THE DRIVER SIDE AIRBAG DEPLOYMENT CONTROL DTC FOR A FAULT STATUS CHANGE (OPEN INDICATED)

    NOTE: This pinpoint test step attempts to change the fault reported by the RCM by inducing a different fault condition. If the reported fault changes, this indicates the RCM is functioning correctly and is not the source of the fault.

    • Connect a fused jumper wire:
      Positive Lead Measurement / Action Negative Lead
      C3051-1
      GFD135987Courtesy of FORD MOTOR COMPANY
      		 C3051-2
    • Ignition ON.
    • Using a diagnostic scan tool, perform RCM self-test.
    • DIAGNOSTIC TIP:  When viewing DTCs with the driver side airbag circuits shorted together, a low resistance fault is normally retrieved.

    Did the on-demand DTC change from B1404:13 to B1404:1A? 

    Yes  REMOVE the fused jumper wire and GO to  K11.
    No  REMOVE the fused jumper wire and GO to  K12.

  14. K8 CHECK THE DRIVER SIDE AIRBAG DEPLOYMENT CONTROL DTC FOR A FAULT STATUS CHANGE (SHORT TO GROUND INDICATED)

    NOTE: This pinpoint test step attempts to change the fault reported by the RCM by inducing a different fault condition. If the reported fault changes, this indicates the RCM is functioning correctly and is not the source of the fault.

    • Ignition OFF.
    • Disconnect Driver Side Airbag (Inline) C3051 .
    • Ignition ON.
    • Using a diagnostic scan tool, perform RCM self-test.
    • DIAGNOSTIC TIP:  When viewing DTCs with the driver side airbag disconnected, an open circuit fault is normally retrieved.

    Did the on-demand DTC change from B1404:11 to B1404:13? 

    Yes  GO to  K11.
    No  GO to  K9.

  15. K9 CHECK THE DRIVER SIDE AIRBAG CIRCUITS FOR A SHORT TO GROUND

    • Ignition OFF.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3051-1
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground
      C3051-2
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  K12.
    No  REPAIR the affected circuit. Refer to Connector Repair Procedures for schematic and connector information. Go to  K17.

  16. K10 CHECK THE DRIVER SIDE AIRBAG CIRCUITS FOR A SHORT TO VOLTAGE

    • Ignition OFF.
    • Disconnect Driver Side Airbag (Inline) C3051 .
    • Ignition ON.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3051-1
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground
      C3051-2
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the affected circuit. Refer to Connector Repair Procedures for schematic and connector information. Go to  K17.
    No  GO to  K12.

  17. K11 CONFIRM THE DRIVER SIDE AIRBAG FAULT

    NOTE: Make sure all SRS components and the RCM electrical connectors are connected before carrying out self-test. If not, DTCs will be recorded.

    • Ignition OFF.
    • Prior to reconnecting any previously disconnected SRS component:
      • Inspect connector(s) (including any inline connectors) for pushed-out, loose or spread terminals and loose or frayed wire connections at terminals.
      • Inspect wire harness for any damage, pinched, cut or pierced wires.
      • Inspect RCM C310A and C310B

        CPA lever/lock for correct operation.

      • Inspect Driver Side Airbag C3051 and make sure the CPA tabs are not broken and the clip is not damaged.
    • Connect Driver Side Airbag (Inline) C3051 .
    • Ignition ON.
    • Using a diagnostic scan tool, perform RCM self-test.

    Was the original DTC retrieved on-demand during self-test? 

    Yes  REMOVE and INSPECT the driver seat backrest harness for damage. If a concern is found with the driver seat backrest harness, REPAIR as necessary. Refer to Connector Repair Procedures for schematic and connector information. Go to  K17. If no concern is found with the driver seat backrest harness, INSTALL a new driver side airbag. REFER to Side Airbag . GO to  K17.
    No  In the process of diagnosing the fault, the fault condition has become intermittent. Do not install any new SRS components at this time. Install SRS components only when directed to do so in the pinpoint test. For DTC B1404:13 or B1404:1A, GO to  K13. For DTC B1404:11, GO to  K14. For DTC B1404:12, GO to  K15.

  18. K12 CONFIRM THE RCM FAULT

    NOTE: Make sure all SRS components and the RCM electrical connectors are connected before carrying out the self-test. If not, DTCs will be recorded.

    • Ignition OFF.
    • Prior to reconnecting any previously disconnected SRS component:
      • Inspect connector(s) (including any inline connectors) for pushed-out, loose or spread terminals and loose or frayed wire connections at terminals.
      • Inspect wire harness for any damage, pinched, cut or pierced wires.
      • Inspect RCM C310A and C310B

        CPA lever/lock for correct operation.

    • Connect Driver Side Airbag (Inline) C3051 (if previously disconnected).
    • Connect RCM C310A and C310B (if previously disconnected).
    • Ignition ON.
    • Using a diagnostic scan tool, perform RCM self-test.

    Was the original DTC retrieved on-demand during self-test? 

    Yes  CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no TSBs address this concern, INSTALL a new RCM. REFER to Restraints Control Module (RCM) . GO to  K17.
    No  In the process of diagnosing the fault, the fault condition has become intermittent. Do not install any new SRS components at this time. Install SRS components only when directed to do so in the pinpoint test. For DTC B1404:13 or B1404:1A, GO to  K13. For DTC B1404:11, GO to  K14. For DTC B1404:12, GO to  K15.

  19. K13 CHECK THE DRIVER SIDE AIRBAG DEPLOYMENT CONTROL RESISTANCE (DEPLOY_10_R) PID FOR AN INTERMITTENT LOW RESISTANCE OR OPEN CIRCUIT FAULT

    • Using a diagnostic scan tool, view RCM PIDs.
    • While monitoring the DEPLOY_10_R PID, attempt to recreate the fault by wiggling connectors (including any inline connectors) and flexing the wire harness frequently. Record the resistance value indicated by the PID.

    Does the PID value read between 1.44 and 3.52 ohms? 

    Yes  The fault is not present and cannot be recreated at this time. Do not install any new SRS components at this time. Install SRS components only when directed to do so in the pinpoint test. GO to  K16.
    No  DEPOWER the SRS and REPAIR as necessary. Refer to Connector Repair Procedures , for schematic and connector information. Go to  K17.

  20. K14 CHECK THE DRIVER SIDE AIRBAG DEPLOYMENT CONTROL FOR AN INTERMITTENT SHORT TO GROUND FAULT

    • Attempt to recreate the fault by wiggling connectors (including any inline connectors) and flexing the wire harness frequently.
    • Using a diagnostic scan tool, perform RCM self-test.

    Was DTC B1404:11 retrieved on-demand during self-test? 

    Yes  DEPOWER the SRS and REPAIR as necessary. Refer to Connector Repair Procedures , for schematic and connector information. Go to  K17.
    No  The fault is not present and cannot be recreated at this time. Do not install any new SRS components at this time. Install SRS components only when directed to do so in the pinpoint test. GO to  K16.

  21. K15 CHECK THE DRIVER SIDE AIRBAG DEPLOYMENT CONTROL FOR AN INTERMITTENT SHORT TO BATTERY FAULT

    • Ignition OFF.
    • Disconnect Driver Side Airbag (Inline) C3051 .
    • Ignition ON.
    • Attempt to recreate the fault by wiggling connectors (including any inline connectors) and flexing the wire harness frequently.
    • Using a diagnostic scan tool, perform RCM self-test.

    Was DTC B1404:12 retrieved on-demand during self-test? 

    Yes  DEPOWER the SRS and REPAIR as necessary. Refer to Connector Repair Procedures , for schematic and connector information. Go to  K17.
    No  The fault is not present and cannot be recreated at this time. Do not install any new SRS components at this time. Install SRS components only when directed to do so in the pinpoint test. GO to  K16.

  22. K16 CHECK THE HARNESS AND CONNECTORS

    • Ignition OFF.
    • Disconnect Driver Side Airbag (Inline) C3051 .
      • Inspect connector(s) (including any inline connectors) for corrosion, loose or spread terminals and loose or frayed wire connections at terminals.
      • Inspect wire harness for any damage, pinched, cut or pierced wires.
      • Inspect RCM C310A and C310B

        CPA lever/lock for correct operation.

      • Inspect Driver Side Airbag (Inline) C3051

        CPA tab to verify that it is correctly seated and free of damage.

    Were any concerns found? 

    Yes  REPAIR as necessary. Refer to Connector Repair Procedures , for schematic and connector information. Go to  K17.
    No  The fault is not present and cannot be recreated at this time. Do not install any new SRS components at this time. Install SRS components only when directed to do so in the pinpoint test. GO to  K17.

  23. K17 CHECK FOR ADDITIONAL SRS DTCs

    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.
    • Reconnect all SRS components (if previously disconnected).
    • Ignition ON.
    • Using a diagnostic scan tool, perform RCM self-test.

    Are any RCM DTCs retrieved on-demand during self-test? 

    Yes  Do not clear any DTCs until all DTCs have been resolved. DIAGNOSE and REPAIR the RCM DTCs. REFER to Restraints Control Module (RCM) DTC Chart  for pinpoint test direction.
    No  The repair is complete. RETURN the vehicle to the customer.
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