Pinpoint Test - DTC: H B0052:11, B0052:12, B0052:13, B0052:1D

Refer to Supplemental Restraint System . For schematic and connector Information.

Normal Operation and Fault Conditions 

The RCM continuously monitors the passenger safety belt buckle switch circuits. For the following faults:

• Open circuit
• Short to voltage
• Short to ground
• Current out of range
• Faulted passenger safety belt buckle switch

If a fault is detected, the RCM stores DTC B0052:11, B0052:12, B0052:13 or B0052:1D in memory and sends a message to the IPC to illuminate the airbag warning indicator.

DTC Fault Trigger Conditions 

Possible Sources 

• Wiring, terminals or connectors
• Passenger safety belt buckle switch
• RCM

Visual Inspection and Diagnostic Pre-checks 

• Inspect. For a damaged passenger safety belt buckle.
• Inspect. For damaged wiring harness(es).
• Inspect. For loose or damaged connectors.

PINPOINT TEST A : B0052:11, B0052:12, B0052:13 AND B0052:1D 

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: 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 be. Fore releasing the vehicle to the customer.
7. A1 RETRIEVE RCM (RESTRAINTS CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
   
   
   • 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, per. Form RCM self-test.

   Was DTC B0052:11, B0052:12, B0052:13 and B0052:1D 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 B0052:11 or B0052:1D, GO to  A2. For DTC B0052:12, GO to  A4. For DTC B0052:13, GO to  A5

   No	This is an intermittent fault when present as a Continuous Memory Diagnostic Trouble Code (CMDTC) only. GO to  A10

8. A2 CHECK THE PASSENGER SAFETY BELT BUCKLE SWITCH DTC (DIAGNOSTIC TROUBLE CODE). For A FAULT STATUS CHANGE (SHORT TO GROUND OR CURRENT OUT OF RANGE 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 Passenger Safety Belt Buckle C3738 .
   • Ignition ON.
   • Using a diagnostic scan tool, per. Form RCM self-test.
   • DIAGNOSTIC TIP:  When viewing Diagnostic Trouble Codes (DTCs) with the passenger safety belt buckle switch disconnected, an open circuit fault is normally retrieved. A Belt Tension Sensor (BTS) circuit fault will also be present in the OCSM, since the passenger safety belt buckle switch shares a connector with the Belt Tension Sensor (BTS).

   Did the on-demand DTC change from B0052:11 or B0052:1D to B0052:13? 

   Yes

   GO to  A8

   No	For DTC B0052:11, GO to  A3. For DTC B0052:1D, GO to  A9

9. A3 CHECK THE PASSENGER SAFETY BELT BUCKLE SWITCH CIRCUIT. For A SHORT TO GROUND
   
   
   • Ignition OFF.
   • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering .
   • Disconnect RCM C310A and C310B .
   • Measure:

     Positive Lead	Measurement / Action	Negative Lead
     C3738-5	Courtesy of FORD MOTOR COMPANY	Ground

   Is the resistance greater than 10, 000 ohms? 

   Yes

   GO to  A9

   No	REPAIR the circuit. REFER to Connector Repair Procedures . For schematic and connector Information. GO to  A11

10. A4 CHECK THE PASSENGER SAFETY BELT BUCKLE SWITCH CIRCUIT. For A SHORT TO VOLTAGE
    
    
    • Ignition OFF.
    • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering .
    • Disconnect RCM C310A and C310B .
    • Disconnect Passenger Side Airbag (Inline) C3049 .
    • Disconnect Passenger Safety Belt Buckle C3738 .
    • Repower the SRS. Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Repowering .
    • Ignition ON.
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      C3738-5	Courtesy of FORD MOTOR COMPANY	Ground

    Is any voltage present? 

    Yes	REPAIR the circuit. REFER to Connector Repair Procedures . For schematic and connector Information. GO to  A11

    No

    GO to  A9

11. A5 CHECK THE PASSENGER SAFETY BELT BUCKLE SWITCH 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.
    • Ignition OFF.
    • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering .
    • Disconnect Passenger Side Airbag (Inline) C3049 .
    • Disconnect Passenger Safety Belt Buckle C3738 .
    • Connect a fused jumper wire:

      Lead 1	Measurement / Action	Lead 2
      C3738-5	Courtesy of FORD MOTOR COMPANY	C3738-6

    • Repower the SRS. Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Repowering .
    • Ignition ON.
    • Using a diagnostic scan tool, per. Form RCM self-test.
    • DIAGNOSTIC TIP:  When viewing Diagnostic Trouble Codes (DTCs) with the passenger safety belt buckle switch circuits shorted together, a short to ground fault is normally retrieved. A Belt Tension Sensor (BTS) circuit fault will also be present in the OCSM, since the passenger safety belt buckle switch shares a connector with the Belt Tension Sensor (BTS).

    Did the on-demand DTC change from B0052:13 to B0052:11? 

    Yes	REMOVE the fused jumper wire and GO to  A8

    No	REMOVE the fused jumper wire and GO to  A6

12. A6 CHECK THE PASSENGER SAFETY BELT BUCKLE SWITCH CIRCUIT. For AN OPEN
    
    
    • Ignition OFF.
    • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering .
    • Disconnect RCM C310A and C310B .
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      C310B-55	Courtesy of FORD MOTOR COMPANY	C3738-5

    Is the resistance less than 0.5 ohm? 

    Yes

    GO to  A7

    No	REPAIR the circuit. REFER to Connector Repair Procedures . For schematic and connector Information. GO to  A11

13. A7 CHECK THE PASSENGER SAFETY BELT BUCKLE SWITCH GROUND CIRCUIT. For AN OPEN
    
    
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      C3738-6	Courtesy of FORD MOTOR COMPANY	Ground

    Is the resistance less than 3 ohms? 

    Yes

    GO to  A9

    No	REPAIR the circuit. REFER to Connector Repair Procedures . For schematic and connector Information. GO to  A11

14. A8 CONFIRM THE PASSENGER SAFETY BELT BUCKLE SWITCH FAULT
    
    
    NOTE: Make sure all SRS components and the RCM electrical connectors are connected be. Fore 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 .
    • 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 Passenger Side Airbag (Inline) C3049 (if previously disconnected).
    • Connect Passenger Safety Belt Buckle C3738 .
    • Repower the SRS. Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Repowering .
    • Ignition ON.
    • Using a diagnostic scan tool, per. Form RCM self-test.

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

    Yes	INSTALL a new passenger safety belt buckle (includes buckle switch). REFER to: Front Seatbelt Buckle . GO to  A11

    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  A10

15. A9 CONFIRM THE RCM (RESTRAINTS CONTROL MODULE) FAULT
    
    
    NOTE: Make sure all SRS components and the RCM electrical connectors are connected be. Fore 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 .
    • 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 RCM C310A and C310B (if previously disconnected).
    • Connect Passenger Side Airbag (Inline) C3049 (if previously disconnected).
    • Connect Passenger Safety Belt Buckle C3738 .
    • Repower the SRS. Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Repowering .
    • Ignition ON.
    • Using a diagnostic scan tool, per. Form 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  A11

    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  A10

16. A10 CHECK. For AN INTERMITTENT FAULT
    
    
    • Ignition OFF.
    • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering .
    • Disconnect Passenger Safety Belt Buckle C3738 .
      • 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.
      • Repair any concerns found. REFER to Connector Repair Procedures . For schematic and connector Information.

    • Connect all previously disconnected component(s) / connector(s).
    • Repower the SRS. Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Repowering .
    • Ignition ON.
    • Using a diagnostic scan tool, per. Form RCM self-test.

    Was DTC B0052:11, B0052:12, B0052:13 and B0052:1D 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 B0052:11 or B0052:1D, GO to  A2. For DTC B0052:12, GO to  A4. For DTC B0052:13, GO to  A5

    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  A11

17. A11 CHECK. For ADDITIONAL SRS (SUPPLEMENTAL RESTRAINT SYSTEM) DIAGNOSTIC TROUBLE CODES (DTCS)
    
    
    • Ignition OFF.
    • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering .
    • Reconnect all SRS components (if previously disconnected).
    • Repower the SRS.

      Do not  prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) 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, per. Form

      Restraints  self-test.

    Are any RCMOCSM 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: Airbag Supplemental Restraint System (SRS) .

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