Pinpoint Test AA - DTC: B1415:81, B1418:11, B1418:81, B1418:93

Refer to Wiring Diagram SUPPLEMENTAL RESTRAINT SYSTEM for schematic and connector information.

Normal Operation and Fault Conditions 

The RCM monitors the passenger front door and LH C-pillar side impact sensors and circuits for the following faults:

• Open circuit
• Short to voltage
• Short to ground
• Faulted passenger front door side impact sensor
• Faulted LH C-pillar side impact sensor

If a fault is detected, the RCM stores DTC B1415:81, B1418:11, B1418:81 or B1418:93 in memory and sends a message to the IPC to illuminate the airbag warning indicator.

The RCM communicates with each impact sensor. If the RCM is unable to communicate with the sensor, a DTC is stored in memory. A Continuous Memory Diagnostic Trouble Code (CMDTC) no operation (failure type: 93) can be set by a short to voltage on the return circuit of the impact sensor.

When the feed circuit of either impact sensor is shorted to voltage, an invalid data received fault (failure type :81) may also be present for both sensors. DTC Fault Trigger Conditions 

DTC	Description	Fault Trigger Conditions
B1415:81	Driver Side Restraints Sensor 2: Invalid Serial Data Received	A fault is indicated when the RCM senses a faulted LH C-pillar side impact sensor or an open on the LH C-pillar side impact sensor circuits.
B1418:11	Passenger Side Restraints Sensor 1: Circuit Short to Ground	A fault is indicated when the RCM senses a shorted passenger front door side impact sensor, a shorted LH C-pillar side impact sensor, a short to ground on the passenger front door side impact sensor feed circuit or a short to ground on the LH C-pillar side impact sensor feed circuit.
B1418:81	Passenger Side Restraints Sensor 1: Invalid Serial Data Received	A fault is indicated when the RCM senses a faulted passenger front door side impact sensor or an open on the passenger front door side impact sensor circuits.
B1418:93	Passenger Side Restraints Sensor 1: No Operation	A fault is indicated when the RCM senses a faulted LH C-pillar side impact sensor or passenger front door side impact sensor, or a short to voltage on the feed or return circuit of the LH C-pillar side impact sensor or passenger front door side impact sensor.

Possible Sources 

• Wiring, terminals or connectors
• Passenger front door side impact sensor
• LH C-pillar side impact sensor
• RCM

Visual Inspection and Diagnostic Pre-checks 

• Inspect for damaged wiring harness(es).

PINPOINT TEST A : B1415:81, B1418:11, B1418:81, B1418:93 

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: SRS components should only be disconnected or reconnected 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. NOTE: Do not probe any impact sensor. The impact sensor cannot be tested using a multi-meter.
7. A1 RETRIEVE RCM (RESTRAINTS CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
   
   
   • WARNING: Before beginning any service procedure in this service information, refer to Safety Warnings in the General Information article. 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.

   Were any Diagnostic Trouble Codes (DTCs) retrieved on-demand during self-test? 

   Yes	The fault(s) cannot be cleared until corrected and the Diagnostic Trouble Codes (DTCs) are no longer retrieved on-demand during self-test. For DTC B1418:11, GO to  A2For DTC B1418:93, GO to  A6For DTC B1415:81, GO to  A8For DTC B1418:81, GO to  A11

   No	The fault is intermittent when present as a Continuous Memory Diagnostic Trouble Code (CMDTC) only. GO to  A15

8. A2 CHECK THE DRIVER SIDE RESTRAINTS SENSOR 2 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 fault reported 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 LH C-Pillar Side Impact Sensor C3248 .
   • 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.

   Did the on-demand Diagnostic Trouble Codes (DTCs) change from B1418:11 to B1418:81? 

   Yes	INSTALL a new LH C-pillar side impact sensor. REFER to: C-Pillar Side Impact Sensor GO to  A16

   No

   GO to  A3

9. A3 CHECK THE PASSENGER SIDE RESTRAINTS SENSOR 1 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 fault reported 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
   • Connect LH C-Pillar Side Impact Sensor C3248 .
   • Disconnect Passenger Front Door Side Impact Sensor C644 .
   • 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.

   Did the on-demand DTC change from B1418:11 to B1418:81? 

   Yes	INSTALL a new passenger front door side impact sensor. REFER to: Front Door Side Impact Sensor GO to  A16

   No

   GO to  A4

10. A4 CHECK THE LH (LEFT-HAND) C-PILLAR SIDE IMPACT SENSOR FEED CIRCUIT FOR A SHORT TO GROUND AND SHORT BETWEEN SENSOR CIRCUITS
    
    
    • Ignition OFF.
    • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering
    • Disconnect LH C-Pillar Side Impact Sensor C3248 .
    • Disconnect RCM C310A and C310B .
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      C3248-1	Courtesy of FORD MOTOR COMPANY	Ground

    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      C3248-1	Courtesy of FORD MOTOR COMPANY	C3248-2

    Are the resistances greater than 10, 000 ohms? 

    Yes

    GO to  A5

    No	REPAIR the affected circuit(s). REFER to Wiring Diagram CONNECTOR REPAIR PROCEDURES for schematic and connector information. GO to  A16

11. A5 CHECK THE PASSENGER FRONT DOOR SIDE IMPACT SENSOR FEED CIRCUIT FOR A SHORT TO GROUND AND SHORT BETWEEN SENSOR CIRCUITS
    
    
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      C644-1	Courtesy of FORD MOTOR COMPANY	Ground

    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      C644-1	Courtesy of FORD MOTOR COMPANY	C644-2

    Are the resistances greater than 10, 000 ohms? 

    Yes	GO to  A14

    No	REPAIR the affected circuit(s). REFER to Wiring Diagram CONNECTOR REPAIR PROCEDURES for schematic and connector information. GO to  A16

12. A6 CHECK THE LH (LEFT-HAND) C-PILLAR SIDE IMPACT SENSOR FEED CIRCUIT FOR A SHORT TO VOLTAGE (INVALID SERIAL DATA RECEIVED)
    
    
    • Ignition OFF.
    • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering
    • Disconnect RCM C310A and C310B .
    • Disconnect LH C-Pillar Side Impact Sensor C3248 .
    • 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
      C3248-1	Courtesy of FORD MOTOR COMPANY	Ground
      C3248-2	Courtesy of FORD MOTOR COMPANY	Ground

    Is any voltage present? 

    Yes	REPAIR the circuits. REFER to Wiring Diagram CONNECTOR REPAIR PROCEDURES for schematic and connector information. GO to  A16

    No

    GO to  A7

13. A7 CHECK THE PASSENGER FRONT DOOR SIDE IMPACT SENSOR FEED CIRCUIT FOR A SHORT TO VOLTAGE (INVALID SERIAL DATA RECEIVED)
    
    
    • Ignition OFF.
    • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering
    • Disconnect Passenger Front Door Side Impact Sensor C644 .
    • 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
      C644-1	Courtesy of FORD MOTOR COMPANY	Ground
      C644-2	Courtesy of FORD MOTOR COMPANY	Ground

    Is any voltage present? 

    Yes	REPAIR the affected circuits. REFER to Wiring Diagram CONNECTOR REPAIR PROCEDURES for schematic and connector information. GO to  A16

    No	GO to  A14

14. A8 CHECK THE LH (LEFT-HAND) C-PILLAR SIDE IMPACT SENSOR AND RCM (RESTRAINTS CONTROL MODULE) CONNECTIONS (INVALID SERIAL DATA RECEIVED)
    
    
    • Ignition OFF.
    • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering
    • Gain access to the LH C-pillar side impact sensor and inspect C3248 to make sure it is fully seated and locked. Seat and lock the connector as necessary. REFER to: C-Pillar Side Impact Sensor
    • Gain access to the RCM and inspect C310A and C310B to make sure they are fully seated and locked. Seat and lock the connector(s) as necessary. REFER to: Restraints Control Module (RCM)
    • 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 DTC B1415:81 retrieved on-demand during self-test? 

    Yes

    GO to  A9

    No	The fault is corrected. GO to  A16

15. A9 CHECK THE LH (LEFT-HAND) C-PILLAR SIDE IMPACT SENSOR CIRCUITS FOR AN OPEN (INVALID SERIAL DATA RECEIVED)
    
    
    • Ignition OFF.
    • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering
    • Disconnect RCM C310A and C310B .
    • Disconnect LH C-Pillar Side Impact Sensor C3248 .
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      C310B-45	Courtesy of FORD MOTOR COMPANY	C3248-1
      C310B-46	Courtesy of FORD MOTOR COMPANY	C3248-2

    Are the resistances less than 0. 5 ohm? 

    Yes	GO to  A10

    No	REPAIR the affected circuit. REFER to Wiring Diagram CONNECTOR REPAIR PROCEDURES for schematic and connector information. GO to  A16

16. A10 CHECK THE DRIVER SIDE RESTRAINTS SENSOR 2 DTC (DIAGNOSTIC TROUBLE CODE) FOR A FAULT STATUS CHANGE (INVALID SERIAL DATA RECEIVED)
    
    
    NOTE: This pinpoint test step attempts to change the fault reported by the RCM by inducing a different fault condition. If the fault reported 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
      C3248-1	Courtesy of FORD MOTOR COMPANY	C3248-2

    • 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.

    Did the DTC change from B1415:81 to B1418:11? 

    Yes	REMOVE the fused jumper wire and INSTALL a new LH C-pillar side impact sensor. REFER to: C-Pillar Side Impact Sensor GO to  A16

    No	REMOVE the fused jumper wire and GO to  A14

17. A11 CHECK THE PASSENGER FRONT DOOR SIDE IMPACT SENSOR AND RCM (RESTRAINTS CONTROL MODULE) CONNECTIONS (INVALID SERIAL DATA RECEIVED)
    
    
    • Ignition OFF.
    • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering
    • Gain access to the passenger front door side impact sensor and inspect C644 to make sure it is fully seated and locked. Seat and lock the connector as necessary. REFER to: Front Door Side Impact Sensor
    • Gain access to the RCM and inspect C310A and C310B to make sure they are fully seated and locked. Seat and lock the connector(s) as necessary. REFER to: Restraints Control Module (RCM)
    • 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 DTC B1418:81 retrieved on-demand during self-test? 

    Yes	GO to  A12

    No	Fault corrected. GO to  A16

18. A12 CHECK THE PASSENGER FRONT DOOR SIDE IMPACT SENSOR CIRCUITS FOR AN OPEN (INVALID SERIAL DATA RECEIVED)
    
    
    • Ignition OFF.
    • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering
    • Disconnect RCM C310A and C310B .
    • Disconnect Passenger Front Door Side Impact Sensor C644 .
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      C310B-32	Courtesy of FORD MOTOR COMPANY	C644-1
      C310B-31	Courtesy of FORD MOTOR COMPANY	C644-2

    Are the resistances less than 0. 5 ohm? 

    Yes	GO to  A13

    No	REPAIR the affected circuit. REFER to Wiring Diagram CONNECTOR REPAIR PROCEDURES for schematic and connector information. GO to  A16

19. A13 CHECK THE PASSENGER SIDE RESTRAINTS SENSOR 1 DTC (DIAGNOSTIC TROUBLE CODE) FOR A FAULT STATUS CHANGE (INVALID SERIAL DATA RECEIVED)
    
    
    NOTE: This pinpoint test step attempts to change the fault reported by the RCM by inducing a different fault condition. If the fault reported 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
      C644-1	Courtesy of FORD MOTOR COMPANY	C644-2

    • 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.

    Did the DTC change from B1418:81 to B1418:11? 

    Yes	REMOVE the fused jumper wire and INSTALL a new passenger front door side impact sensor. REFER to: Front Door Side Impact Sensor GO to  A16

    No	REMOVE the fused jumper wire and GO to  A14

20. A14 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 damage, pinched, cut or pierced wires.
      • inspect RCM C310A and C310B Connector Position Assurance (CPA) lever/lock for correct operation. REFER to: Restraints Control Module (RCM)
      • repair any concerns found. REFER to Wiring Diagram CONNECTOR REPAIR PROCEDURES for schematic and connector information.

    • Connect LH C-Pillar Side Impact Sensor C3248 .
    • Connect Passenger Front Door Side Impact Sensor C644 .
    • 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	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  A16

    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. GO to  A15

21. A15 CHECK FOR AN INTERMITTENT FAULT
    
    
    • Ignition OFF.
    • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering
    • Disconnect LH C-Pillar Side Impact Sensor C3248 and Passenger Front Door Side Impact Sensor C644 .
    • Disconnect RCM C310A and C310B .
    • Inspect:
      • harness and component connectors for loose or spread terminals and loose or frayed wire connections at terminals.
      • wire harness for any damage, pinched, cut or pierced wires.
      • RCM C310A and C310B Connector Position Assurance (CPA) lever/lock for correct operation. REFER to: Restraints Control Module (RCM)
      • repair any concerns found. REFER to Wiring Diagram CONNECTOR REPAIR PROCEDURES for schematic and connector information.
    • Connect LH C-Pillar Side Impact Sensor C3248 and Passenger Front Door Side Impact Sensor C644 .
    • 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 DTC B1415:81, B1418:11, B1418:81 or B1418:93 retrieved on-demand during self-test? 

    Yes	Fault(s) cannot be cleared until corrected and the DTC is no longer retrieved on-demand during self-test. For DTC B1418:11, GO to  A2 For DTC B1418:93, GO to  A6 For DTC B1415:81, GO to  A8 For DTC B1418:81, GO to  A11

    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 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, Diagnostic Trouble Codes (DTCs) are retrieved from the RCM and OCSM.

      Using a diagnostic scan tool, perform the

      Restraints  self-test.

    Are any RCM and/or OCSM 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 DTC Chart: Restraint Control Module (RCM) or DTC Chart: Occupant Classification System Module (OCSM) REFER to for pinpoint test direction.

    No	CLEAR all RCM and OCSM Continuous Memory Diagnostic Trouble Codes (CMDTCs). PROVE OUT the SRS. The repair is complete. RETURN the vehicle to the customer.