Pinpoint Test RR - DTC: B141C:11, B141C:12, B141C:13, B141C:1A

Diagnostic Overview 

Refer to Supplemental Restraint System for schematic and connector information.

Normal Operation and Fault Conditions 

The RCM continuously monitors the second row right seatbelt inflator and circuits for the following faults:

• Resistance out of range
• Unexpected voltage
• Short to ground
• Faulted second row right seatbelt inflator

If a fault is detected, the RCM stores DTC B141C:11, B141C:12, B141C:13 or B141C: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:

• Wiring
• Connections
• Second row right seatbelt inflator
• RCM

Courtesy of FORD MOTOR COMPANY

DTC Fault Trigger Conditions 

DTC	Description	Fault Trigger Conditions
B141C:11	Second Row Passenger Inflatable Seatbelt Deployment Control: Circuit Short to Ground	A fault is indicated when the RCM senses a short to ground on either second row right seatbelt inflator circuit for more than 6 seconds.
B141C:12	Second Row Passenger Inflatable Seatbelt Deployment Control: Circuit Short to Battery	A fault is indicated when the RCM senses a short to voltage on either second row right seatbelt inflator circuit for more than 6 seconds.
B141C:13	Second Row Passenger Inflatable Seatbelt Deployment Control: Circuit Open	A fault is indicated when the RCM measures more than the desired resistance range between the second row right seatbelt inflator circuits for more than 6 seconds.
B141C:1A	Second Row Passenger Inflatable Seatbelt Deployment Control: Circuit Resistance Below Threshold	A fault is indicated when the RCM measures less than the desired resistance range between the second row right seatbelt inflator circuits for more than 6 seconds.

Possible Sources 

• Wiring, terminals or connectors
• Second row right seatbelt inflator
• RCM

Visual Inspection and Diagnostic Pre-checks 

• Inspect for damaged wiring harness(es).
• Inspect for loose or damaged connectors.

PINPOINT TEST A : B141C:11, B141C:12, B141C:13, B141C:1A 

1. WARNING: Do not handle, move or change the original horizontal mounting position of the Restraints Control Module (RCM) while the Restraints Control Module (RCM) is connected and the ignition switch is ON. Failure to follow this instruction may result in the accidental deployment of the Safety Canopy ® and cause serious personal injury or death.
2. NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
3. 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.
4. 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.
5. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
6. A1 RETRIEVE RCM (RESTRAINTS CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
   
   
   • WARNING: Before beginning any service procedure in this article, refer to Safety Warnings in GENERAL INFORMATION - FUSION (EXCEPT HYBRID) . Failure to follow this instruction may result in serious personal injury.

     REFER to: Pyrotechnic Device Health and Safety Precautions .

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

   Was DTC B141C:11, B141C:12, B141C:13 or B141C: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 B141C:13 or B141C:1A, GO to  A2. For DTC B141C:11, GO to  A8. For DTC B141C:12, GO to  A10

   No	This is an intermittent fault when present as a CMDTC only. For DTC B141C:13 or B141C:1A, GO to  A13. For DTC B141C:11, GO to  A14. For DTC B141C:12, GO to  A15

7. A2 CHECK THE SECOND ROW PASSENGER INFLATABLE SEATBELT DEPLOYMENT CONTROL RESISTANCE (DEPLOY_28_R) PID (PARAMETER IDENTIFICATION)
   
   
   • Using a diagnostic scan tool, view RCM Parameter Identifications (PIDs).
   • Monitor and record the resistance value displayed by the DEPLOY_28_R PID.

   Does the PID value read between 1.7 and 2.78 ohms? 

   Yes	GO to  A12

   No

   GO to  A3

8. A3 CHECK THE SECOND ROW PASSENGER INFLATABLE SEATBELT DEPLOYMENT CONTROL RESISTANCE (DEPLOY_28_R) PID (PARAMETER IDENTIFICATION) WHILE CARRYING OUT THE HARNESS TEST
   
   
   • While monitoring the DEPLOY_28_R PID, carry out the harness test of the second row right seatbelt inflator 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.
     • Fold down the second row seat backrest.
     • To access the second row right seatbelt inflator connector, pull up the trunk floor carpet where the trunk floor meets the second row seat backrest.

   Does the PID value read between 1.7 and 2.78 ohms while carrying out the harness test? 

   Yes	DEPOWER the SRS and REPAIR the connector, terminals or wire harness. Refer to Connector Repair Procedures for schematic and connector information. GO to  A17

   No	For PID value less than 1.7 ohms, GO to  A4. For PID value greater than 2.78 ohms, GO to  A6

9. A4 CHECK THE SECOND ROW PASSENGER INFLATABLE SEATBELT 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.
   • Depower the SRS. Refer to: Supplemental Restraint System (SRS) Depowering and Repowering .
   • Disconnect Second Row Right Seatbelt Inflator C3645 .
     • Fold down the second row seat backrest.
     • To access the second row right seatbelt inflator connector, pull up the trunk floor carpet where the trunk floor meets the second row seat backrest.

   • Repower the SRS. Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
   • Ignition ON.
   • Using a diagnostic scan tool, perform RCM self-test.
   • DIAGNOSTIC TIP:  When viewing Diagnostic Trouble Codes (DTCs) with the second row right seatbelt inflator disconnected, an open circuit fault is normally retrieved.

   Did the on-demand DTC change from B141C:1A to B141C:13? 

   Yes	GO to  A11

   No

   GO to  A5

10. A5 CHECK FOR A SHORT BETWEEN THE SECOND ROW RIGHT SEATBELT INFLATOR CIRCUITS
    
    
    • Ignition OFF.
    • Depower the SRS. Refer to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect RCM C310A and C310B .
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      C3645-1	Courtesy of FORD MOTOR COMPANY	C3645-2

    Is the resistance greater than 10, 000 ohms? 

    Yes	GO to  A12

    No	REPAIR the circuits. Refer to Connector Repair Procedures for schematic and connector information. GO to  A17

11. A6 CHECK THE SECOND ROW RIGHT SEATBELT INFLATOR CIRCUITS FOR AN OPEN
    
    
    • Ignition OFF.
    • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect Second Row Right Seatbelt Inflator C3645 .
      • Fold down the second row seat backrest.
      • To access the second row right seatbelt inflator connector, pull up the trunk floor carpet where the trunk floor meets the second row seat backrest.

    • Disconnect RCM C310A and C310B .
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      C310B-8	Courtesy of FORD MOTOR COMPANY	C3645-1
      C310B-7	Courtesy of FORD MOTOR COMPANY	C3645-2

    Are the resistances less than 0.5 ohm? 

    Yes

    GO to  A7

    No	REPAIR the circuit(s). Refer to Connector Repair Procedures for schematic and connector information. GO to  A17

12. A7 CHECK THE SECOND ROW PASSENGER INFLATABLE SEATBELT 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
      C3645-1	Courtesy of FORD MOTOR COMPANY	C3645-2

    • Repower the SRS. Do not prove out the SRS at this time. Refer to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • Ignition ON.
    • Using a diagnostic scan tool, perform RCM self-test.
    • DIAGNOSTIC TIP:  When viewing Diagnostic Trouble Codes (DTCs) with the second row right seatbelt inflator circuits shorted together, a low resistance fault is normally retrieved.

    Did the on-demand DTC change from B141C:13 to B141C:1A? 

    Yes	REMOVE the fused jumper wire and GO to  A11

    No	REMOVE the fused jumper wire and GO to  A12

13. A8 CHECK THE SECOND ROW PASSENGER INFLATABLE SEATBELT 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.
    • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect Second Row Right Seatbelt Inflator C3645 .
      • Fold down the second row seat backrest.
      • To access the second row right seatbelt inflator connector, pull up the trunk floor carpet where the trunk floor meets the second row seat backrest.

    • Repower the SRS. Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • Ignition ON.
    • Using a diagnostic scan tool, perform RCM self-test.
    • DIAGNOSTIC TIP:  When viewing Diagnostic Trouble Codes (DTCs) with the second row right seatbelt inflator disconnected, an open circuit fault is normally retrieved.

    Did the on-demand DTC change from B141C:11 to B141C:13? 

    Yes	GO to  A11

    No

    GO to  A9

14. A9 CHECK THE SECOND ROW RIGHT SEATBELT INFLATOR CIRCUITS FOR A SHORT TO GROUND
    
    
    • Ignition OFF.
    • Depower the SRS. Refer to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect RCM C310A and C310B .
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      C3645-1	Courtesy of FORD MOTOR COMPANY	Ground
      C3645-2	Courtesy of FORD MOTOR COMPANY	Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes	GO to  A12

    No	REPAIR the circuit(s). Refer to Connector Repair Procedures for schematic and connector information. GO to  A17

15. A10 CHECK THE SECOND ROW RIGHT SEATBELT INFLATOR CIRCUITS FOR A SHORT TO VOLTAGE
    
    
    • Ignition OFF.
    • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect Second Row Right Seatbelt Inflator C3645 .
      • Fold down the second row seat backrest.
      • To access the second row right seatbelt inflator connector, pull up the trunk floor carpet where the trunk floor meets the second row seat backrest.

    • Disconnect RCM C310A and C310B .
    • Repower the SRS. Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • Ignition ON.
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      C3645-1	Courtesy of FORD MOTOR COMPANY	Ground
      C3645-2	Courtesy of FORD MOTOR COMPANY	Ground

    Is any voltage present? 

    Yes	REPAIR the circuit(s). Refer to Connector Repair Procedures for schematic and connector information. GO to  A17

    No	GO to  A12

16. A11 CONFIRM THE SECOND ROW RIGHT SEATBELT INFLATOR 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.
    • Depower the SRS. Refer to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • 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 Connector Repair Procedures for schematic and connector information.

    • Connect Second Row Right Seatbelt Inflator C3645 (if previously disconnected).
    • Connect RCM C310A and C310B (if previously disconnected).
    • Repower the SRS. Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • 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 rear seatbelt buckle assembly (includes second row right seatbelt inflator). Refer to: Rear Seatbelt Buckle Assembly - Vehicles With: Inflatable Seatbelts . 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 B141C:13 or B141C:1A, GO to  A13. For DTC B141C:11, GO to  A14. For DTC B141C:12, GO to  A15

17. 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.
    • Depower the SRS. Refer to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • 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 Connector Repair Procedures for schematic and connector information.

    • Connect Second Row Right Seatbelt Inflator C3645 (if previously disconnected).
    • Connect RCM C310A and C310B .
    • Repower the SRS. Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • 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 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, 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 B141C:13 or B141C:1A, GO to  A13 For DTC B141C:11, GO to  A14 For DTC B141C:12, GO to  A15

18. A13 CHECK THE SECOND ROW PASSENGER INFLATABLE SEATBELT DEPLOYMENT CONTROL RESISTANCE (DEPLOY_28_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_28_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 1.7 and 2.78 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 Connector Repair Procedures for schematic and connector information. GO to  A17

19. A14 CHECK THE SECOND ROW PASSENGER SIDE INFLATABLE SEATBELT 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 B141C:11 retrieved on-demand during self-test? 

    Yes	DEPOWER the SRS and REPAIR as necessary. 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

20. A15 CHECK THE SECOND ROW PASSENGER SIDE INFLATABLE SEATBELT CIRCUITS FOR AN INTERMITTENT SHORT TO VOLTAGE FAULT
    
    
    • Ignition OFF.
    • Depower the SRS. Refer to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect Second Row Right Seatbelt Inflator C3645 .
      • Fold down the second row seat backrest.
      • To access the second row right seatbelt inflator connector, pull up the trunk floor carpet where the trunk floor meets the second row seat backrest.

    • Repower the SRS. Do not prove out the SRS at this time. Refer to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • 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 B141C: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  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. A16 CHECK THE HARNESS AND CONNECTORS
    
    
    • Ignition OFF.
    • Depower the SRS. Refer to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect Second Row Right Seatbelt Inflator C3645 .
      • Fold down the second row seat backrest.
      • To access the second row right seatbelt inflator connector, pull up the trunk floor carpet where the trunk floor meets the second row seat backrest.
      • 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.

    Were any concerns found? 

    Yes	REPAIR as necessary. Refer to 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

22. A17 CHECK FOR ADDITIONAL SRS (SUPPLEMENTAL RESTRAINT SYSTEM) DIAGNOSTIC TROUBLE CODES (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).
    • If previously directed to depower the SRS, repower the SRS. Do not prove out the SRS at this time. Refer to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • 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, perform

      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. Refer to: DIAGNOSIS AND TESTING .

    No	The repair is complete. RETURN the vehicle to the customer.