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Home >> Ford >> 2022 >> Transit Connect Titanium, Gas/Ethanol >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System (3 Of 3) >> Diagnosis And Testing >> Pinpoint Test AK - DTC:

Pinpoint Test AK - DTC:

Refer to Supplemental Restraint System for schematic and connector information.

Normal Operation and Fault Conditions 

The RCM continuously monitors the driver knee airbag circuits for the following faults:

If a fault is detected, the RCM stores DTC B0004:11, B0004:12, B0004:13 or B0004:1A in memory and sends a message to the IPC to illuminate the airbag warning indicator.

The RCM analyzes the deployment loop resistance to determine if a fault exists. The value displayed in the PID is the deployment loop resistance measured by the RCM. If the value displayed is lower or higher than the desired range (refer to diagram below), the RCM can set a DTC. As the deployment loop resistance drifts farther outside the desired range, the chance for a DTC increases. Small variations in resistance can occur due to the effect of road vibrations on terminal fit. Crimps and terminals can be affected by stress and harness movement and can cause an increase in resistance due to wire strain. These variables can result in an intermittent fault. For this reason, the test requires the PID value to be within the desired range before the fault is considered repaired, regardless if the module is reporting an on-demand DTC at the time of diagnosis. Following this direction helps make sure that minor changes in resistance do not create a repeat concern. This test uses process of elimination to diagnose each part of the deployment loop circuit including:

GFD574536Courtesy of FORD MOTOR COMPANY
Item Description
1 May set DTC
2 Desired range

DTC Fault Trigger Conditions 

DTC Description Fault Trigger Conditions
B0004:11 Driver Knee Bolster Deployment Control: Circuit Short to Ground A fault is indicated when the RCM senses a short to ground on either driver knee airbag circuit for more than 6 seconds.
B0004:12 Driver Knee Bolster Deployment Control: Circuit Short to Battery A fault is indicated when the RCM senses a short to voltage on either driver knee airbag circuit for more than 6 seconds.
B0004:13 Driver Knee Bolster Deployment Control: Circuit Open A fault is indicated when the RCM measures more than the desired resistance between the driver knee airbag circuits for more than 6 seconds.
B0004:1A Driver Knee Bolster Deployment Control: Circuit Resistance Below Threshold A fault is indicated when the RCM measures less than the desired resistance between the driver knee airbag circuits for more than 6 seconds.

Possible Sources 

PINPOINT TEST A: B0004:11, B0004:12, B0004:13 AND B0004:1A 

  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: 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.
  6. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.

  7. A1 RETRIEVE RCM (RESTRAINTS CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

    • Ignition ON.

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

    Was DTC B0004:11, B0004:12, B0004:13 and B0004:1A 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. If DTC U3003:16 or U3003:17 is retrieved on-demand, DIAGNOSE those Diagnostic Trouble Codes (DTCs) first. REFER to: Pinpoint Test - DTC: AF . If DTC U3003:16 or U3003:17 is not retrieved on-demand during self-test, DIAGNOSE the driver knee airbag Diagnostic Trouble Codes (DTCs). For DTC B0004:13 or B0004:1A, GO to  A2 For DTC B0004:11, GO to  A8 For DTC B0004:12, GO to  A10
    No  This is an intermittent fault when present as a Continuous Memory Diagnostic Trouble Code (CMDTC) only. If DTC U3003:16 or U3003:17 is retrieved on-demand, DIAGNOSE those Diagnostic Trouble Codes (DTCs) first. REFER to: Pinpoint Test - DTC: AF . If DTC U3003:16 or U3003:17 is not retrieved on-demand during self-test, DIAGNOSE the driver knee airbag Continuous Memory Diagnostic Trouble Codes (CMDTCs). For DTC B0004:13 or B0004:1A, GO to  A13 For DTC B0004:11, GO to  A14 For DTC B0004:12, GO to  A15

  8. A2 CHECK THE DRIVER KNEE BOLSTER DEPLOYMENT CONTROL (DEPLOY_02_R) PID (PARAMETER IDENTIFICATION)

    • Using a diagnostic scan tool, view RCM Parameter Identifications (PIDs).

    • Monitor and record the resistance value displayed by the DEPLOY_02_R PID.

    Does the PID value read between 1.44 and 3.52 ohms? 

    Yes  GO to  A12
    No  GO to  A3

  9. A3 CHECK THE DRIVER KNEE BOLSTER DEPLOYMENT CONTROL (DEPLOY_02_R) PID (PARAMETER IDENTIFICATION) WHILE CARRYING OUT THE HARNESS TEST

    • While monitoring the DEPLOY_02_R PID, carry out the harness test of the driver knee airbag circuits and accessible connectors (including any inline connectors) by wiggling and flexing the wire harness and connectors 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 OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information. GO to  A17
    No  For PID value less than 1.44 ohms, GO to  A4 For PID value greater than 3.52 ohms, GO to  A6

  10. A4 CHECK THE DRIVER KNEE AIRBAG DEPLOYMENT CONTROL DTC (DIAGNOSTIC TROUBLE CODE) 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.

    • Ignition ON.

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

    • DIAGNOSTIC TIP:  When viewing Diagnostic Trouble Codes (DTCs) with the driver knee airbag disconnected, an open circuit fault is normally retrieved.

    Did the on-demand DTC change from B0004:1A to B0004:13? 

    Yes  GO to  A11
    No  GO to  A5

  11. A5 CHECK FOR A SHORT BETWEEN THE DRIVER KNEE AIRBAG CIRCUITS

    • Ignition OFF.

    • Disconnect RCM C310A and C310B.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2432-1
      GFD574537Courtesy of FORD MOTOR COMPANY
      		 C2432-2

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  A12
    No  REPAIR the circuit(s). Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information. GO to  A17

  12. A6 CHECK THE DRIVER KNEE AIRBAG CIRCUITS FOR AN OPEN

    • Ignition OFF.

    • Disconnect RCM C310A and C310B.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C310A-23
      GFD574537Courtesy of FORD MOTOR COMPANY
      		 C2432-1
      C310A-24
      GFD574537Courtesy of FORD MOTOR COMPANY
      		 C2432-2

    Are the resistances less than 0.5 ohm? 

    Yes  GO to  A7
    No  REPAIR the circuits. Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information. GO to  A17

  13. A7 CHECK THE DRIVER KNEE AIRBAG DEPLOYMENT CONTROL DTC (DIAGNOSTIC TROUBLE CODE) 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 RCM C310A and C310B.

    • Connect a fused jumper wire:
      Lead 1 Measurement / Action Lead 2
      C2432-1
      GFD574538Courtesy of FORD MOTOR COMPANY
      		 C2432-2

    • Ignition ON.

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

    • DIAGNOSTIC TIP:  When viewing Diagnostic Trouble Codes (DTCs) with the driver knee airbag circuits shorted together, a low resistance fault is normally retrieved.

    Did the on-demand DTC change from B0004:13 to B0004:1A? 

    Yes  REMOVE the fused jumper wire and GO to  A11
    No  REMOVE the fused jumper wire and GO to  A12

  14. A8 CHECK THE DRIVER KNEE AIRBAG DEPLOYMENT CONTROL DTC (DIAGNOSTIC TROUBLE CODE) 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.

    • Ignition ON.

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

    • DIAGNOSTIC TIP:  When viewing Diagnostic Trouble Codes (DTCs) with the driver knee airbag disconnected, an open circuit fault is normally retrieved.

    Did the on-demand DTC change from B0004:11 to B0004:13? 

    Yes  GO to  A11
    No  GO to  A9

  15. A9 CHECK THE DRIVER KNEE AIRBAG CIRCUITS FOR A SHORT TO GROUND

    • Ignition OFF.

    • Disconnect RCM C310A and C310B.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2432-1
      GFD574537Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2432-2
      GFD574537Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  A12
    No  REPAIR the circuit(s). Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information. GO to  A17

  16. A10 CHECK THE DRIVER KNEE AIRBAG CIRCUITS FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Disconnect RCM C310A and C310B.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2432-1
      GFD574539Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2432-2
      GFD574539Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit(s). Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information. GO to  A17
    No  GO to  A12

  17. A11 CONFIRM THE DRIVER KNEE AIRBAG FAULT

    NOTE: Make sure all SRS components and the RCM electrical connectors are connected before carrying out the self-test. If not, Diagnostic Trouble Codes (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 damaged, pinched, cut or pierced wires.
      • Inspect RCM C310A and C310B Connector Position Assurance (CPA) lever/lock for correct operation.
      • Inspect Driver Knee Airbag C2432 and make sure the Connector Position Assurance (CPA) tabs are not broken and the clip is not damaged.
      • Repair any concerns found. Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information.

    • Ignition ON.

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

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

    Yes  INSTALL a new driver knee airbag. REFER to: Driver Airbag . GO to  A17
    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 B0004:13 or B0004:1A, GO to  A13 For DTC B0004:11, GO to  A14 For DTC B0004:12, GO to  A15

  18. A12 CONFIRM THE RCM (RESTRAINTS CONTROL MODULE) FAULT

    NOTE: Make sure all SRS components and the RCM electrical connectors are connected before carrying out the self-test. If not, Diagnostic Trouble Codes (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 damaged, pinched, cut or pierced wires.
      • Inspect RCM C310A and C310B Connector Position Assurance (CPA) lever/lock for correct operation.
      • Repair any concerns found. Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information.

    • Install the driver knee airbag (if previously removed). REFER to: Driver Airbag .

    • 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 service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new RCM. REFER to: Restraints Control Module (RCM)  . GO to  A17
    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 B0004:13 or B0004:1A, GO to  A13 For DTC B0004:11, GO to  A14 For DTC B0004:12, GO to  A15

  19. A13 CHECK THE DRIVER KNEE BOLSTER DEPLOYMENT CONTROL (DEPLOY_02_R) PID (PARAMETER IDENTIFICATION) FOR AN INTERMITTENT LOW RESISTANCE OR OPEN CIRCUIT FAULT

    • Using a diagnostic scan tool, view RCM Parameter Identifications (PIDs).

    • While monitoring the DEPLOY_02_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  A16
    No  DEPOWER the SRS and REPAIR as necessary. Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information. GO to  A17

  20. A14 CHECK THE DRIVER KNEE AIRBAG DEPLOYMENT CONTROL CIRCUITS 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 B0004:11 retrieved on-demand during self-test? 

    Yes  DEPOWER the SRS and REPAIR as necessary. Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information. GO to  A17
    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  A16

  21. A15 CHECK THE DRIVER KNEE AIRBAG DEPLOYMENT CONTROL CIRCUITS FOR AN INTERMITTENT SHORT TO BATTERY FAULT

    • Ignition OFF.

    • 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 B0004:12 retrieved on-demand during self-test? 

    Yes  DEPOWER the SRS and REPAIR as necessary. Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information. GO to  A17
    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  A16

  22. A16 CHECK THE HARNESS AND CONNECTORS

    • Ignition OFF.

    • Remove the driver knee airbag. REFER to: Driver Airbag .

      • 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 Connector Position Assurance (CPA) lever/lock for correct operation.
      • Inspect Driver Knee Airbag C2432 Connector Position Assurance (CPA) tab to verify that it is correctly seated and free of damage.

    Were any concerns found? 

    Yes  REPAIR as necessary. Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information. GO to  A17
    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  A17

  23. A17 CHECK FOR ADDITIONAL SRS (SUPPLEMENTAL RESTRAINT SYSTEM) DIAGNOSTIC TROUBLE CODES (DTCS)

    • Ignition OFF.

    • Reconnect all SRS components (if previously disconnected).

    • Ignition ON.

    • NOTE: When selecting Restraints from the Self Test menu, DTCs are retrieved from the RCM, OCSM and, if equipped, BECMB.

      Using a diagnostic scan tool, carry out

      Restraints  self-test.

    Are any RCM, OCSM and/or BECMB Diagnostic Trouble Codes (DTCs) retrieved on-demand during self-test? 

    Yes  Do not clear any Diagnostic Trouble Codes (DTCs) until all Diagnostic Trouble Codes (DTCs) have been resolved. DIAGNOSE and REPAIR the Diagnostic Trouble Codes (DTCs). REFER to: Airbag Supplemental Restraint System (SRS) .
    No  The repair is complete. RETURN the vehicle to the customer.
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