LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2006 >> Focus ZX5 SE, Standard >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Inflatable Restraint System >> Diagnosis And Testing >> Pinpoint Tests - Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) >> Pinpoint Tests >> Pinpoint Test P: DTC B1877/B1885 - Seat Belt Driver Pretensioner Circuit Open Fault/Seat Belt Driver Pretensioner Circuit Resistance Low On Squib Fault >> Pinpoint Test P: DTC B1877/B1885 - Seat Belt Driver PRETENSIONER Circuit Open Fault/Seat Belt Driver PRETENSIONER Circuit Low Resistance On Squib Fault

Pinpoint Test P: DTC B1877/B1885 - Seat Belt Driver PRETENSIONER Circuit Open Fault/Seat Belt Driver PRETENSIONER Circuit Low Resistance On Squib Fault

NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough Inspection and Verification before proceeding with the Pinpoint Test.
  1. P1 CHECK FOR CONTINUOUS AND ON-DEMAND DTCs 
    WARNING: Restraint system diagnostic tools are for service only. Tools must be removed prior to operating the vehicle over the road. Failure to remove restraint system diagnostic tools could result in injury and possible violation of vehicle safety standards.
    WARNING: Never probe the connectors on the air bag module. Doing so can result in air bag deployment, which can result in personal injury.
    WARNING: The safety belt pretensioner is a pyrotechnic device. Always wear safety glasses when repairing an air bag equipped vehicle and when handling a safety belt buckle pretensioner or safety belt retractor pretensioner. Never probe a pretensioner electrical connector. Doing so could result in pretensioner or air bag deployment and could result in personal injury.
    NOTE: After diagnosing or repairing an SRS, the restraint system diagnostic tools must be removed before operating the vehicle over the road. 
    NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
    • Enter the following diagnostic mode on the scan tool: On-Demand Self Test.
    • Enter the following diagnostic mode on the scan tool: Retrieve/Record Continuous DTCs.
    • Was DTC B1877 or B1885 retrieved during the on-demand self test? 

    Yes  : This is a hard fault. The fault condition is still present. This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the on-demand self test. GO to  P2.

    No  : This is an intermittent fault. The fault condition is not present at this time. GO to  P7.

  2. P2 CHECK THE DRIVER SAFETY BELT PRETENSIONER CIRCUITS RESISTANCE 

    Yes  : For DTC B1877, GO to  P4.

    For DTC B1885, GO to  P3.

    No  : INSTALL a new driver safety belt pretensioner. REFER to SAFETY BELT SYSTEM . GO to  P7.

  3. P3 CHECK THE DRIVER SAFETY BELT PRETENSIONER CIRCUIT 91S-JA33 (BK/BU) AND CIRCUIT 15S-JA33 (GN/BU) FOR LOW RESISTANCE 
    • Key in OFF position.
    • Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in this article.
    • Disconnect: Restraint System Diagnostic Tool From Driver Safety Belt Pretensioner C323.
    • Disconnect: RCM C2041a and C2041b.
    • Measure the resistance between driver safety belt pretensioner C323-1, circuit 15S-JA33 (GN/BU), harness side and C323-2, circuit 91S-JA33 (BK/BU), harness side.
      Fig 1: Checking Driver Safety Belt Pretensioner Circuit 91S-JA33 (BK/BU) And Circuit 15S-JA33 (GN/BU) For Low Resistance
      G04654886Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 1,000,000 ohms? 

    Yes  : GO to  P6.

    No  : REPAIR circuit 91S-JA33 (BK/BU) and circuit 15S-JA33 (GN/BU). GO to  P8.

  4. P4 CHECK CIRCUIT 91S-JA33 (BK/BU) FOR AN OPEN 
    • Key in OFF position.
    • Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in this article.
    • Disconnect: Restraint System Diagnostic Tool From Driver Safety Belt Pretensioner C323.
    • Disconnect: RCM C2041a and C2041b.
    • Measure the resistance between RCM C2041a-18, circuit 91S-JA33 (BK/BU), harness side and driver safety belt pretensioner C323-2, circuit 91S-JA33 (BK/BU), harness side.
      Fig 2: Checking Circuit 91S-JA33 (BK/BU) For Open
      G04654887Courtesy of FORD MOTOR CO.
    • Is the resistance less than 0.5 ohm? 

    Yes  : GO to  P5.

    No  : REPAIR circuit 91S-JA33 (BK/BU). GO to  P8.

  5. P5 CHECK CIRCUIT 15S-JA33 (GN/BU) FOR AN OPEN 
    • Measure the resistance between RCM C2041a-17, circuit 15S-JA33 (GN/BU), harness side and driver safety belt buckle pretensioner C323-1, circuit 15S-JA33 (GN/BU), harness side.
      Fig 3: Checking Circuit 15S-JA33 (GN/BU) For Open
      G04654888Courtesy of FORD MOTOR CO.
    • Is the resistance less than 0.5 ohm? 

    Yes  : GO to  P6.

    No  : REPAIR circuit 15S-JA33 (GN/BU). GO to  P8.

  6. P6 CONFIRM THE RCM FAULT 
    NOTE: Make sure all restraint system diagnostic tools, sensor electrical connectors and the RCM electrical connectors are connected before carrying out the on-demand self test. If not, erroneous DTCs will be recorded.
    • Connect: Restraint System Diagnostic Tool 418-F395 to Driver Safety Belt Pretensioner C323.
    • Connect: RCM C2041a and C2041b.
    • Repower the system. Do not  prove out the system at this time. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in this article.
    • Enter the following diagnostic mode on the scan tool: On-Demand Self Test.
    • Was DTC B1877 or B1885 retrieved during the on-demand self test? 

    Yes  : INSTALL and CONFIGURE a new RCM. REFER to RESTRAINTS CONTROL MODULE (RCM)  in this article. GO to  P8.

    No  : CHECK for causes of the intermittent fault on the pretensioner circuits. ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition key frequently. REPAIR any intermittent concerns found. GO to  P8.

  7. P7 CHECK FOR AN INTERMITTENT FAULT 

    Yes  : This is a hard fault. The fault condition is now present. This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the on-demand self test.

    CHECK for causes of the intermittent fault at or near the driver safety belt pretensioner electrical connector. REPAIR any intermittent concern found.

    If an intermittent concern was  found and repaired, GO to  P8.

    If an intermittent concern was not found and repaired, GO to for DTC B1885 , GO to for DTC B1877 .

    No  : CHECK for causes of the intermittent fault. ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition key frequently. REPAIR any intermittent concerns found. GO to P8.

  8. P8 CHECK FOR ADDITIONAL DTCs 
    • Refer to the continuous DTCs recorded during Step P1.
    • Were any continuous DTCs retrieved during Step P1? 

    Yes  : Do not clear any DTCs until all DTCs have been resolved. GO to the DIAGNOSTIC TROUBLE CODES (DTCS)  in this article for pinpoint test direction.

    No  : RECONNECT the system. If previously directed to deactivate the system, REACTIVATE the system. REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEACTIVATION AND REACTIVATION  in this article. REPOWER the system. REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in this article. PROVE OUT the system. CLEAR all DTCs.

scientia non olet · About LEMON Manuals