LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1738 (Supplemental Restraint System) >> Diagnosis And Testing >> Pinpoint Tests - Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) >> Pinpoint Tests >> Pinpoint Test P: DTC B2792 - Cross Link Between Firing Loops >> Pinpoint Test P: DTC B2792 - Cross Link Between Firing Loops Fault

Pinpoint Test P: DTC B2792 - Cross Link Between Firing Loops Fault

WARNING: This page is about a different car, the 2006 Mercury Milan, 2006 Lincoln Zephyr, and 2006 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: When installing a new restraints control module (RCM), always make sure the correct RCM is being installed. The RCM 40-pin connector is keyed differently for vehicles with side air curtains and side air bags than the 40-pin connector for vehicles without side air curtains and side air bags. Do not force the 40-pin connector onto the RCM. If the connector is forced onto the RCM, damage to the RCM and/or connector will occur.
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.
    WARNING: Never probe the electrical connector on a side air curtain module. Doing so can result in side air curtain deployment.
    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/Retrieve and Record Continuous Memory DTCs.
    • Enter the following diagnostic mode on the scan tool: View and Record DTC B2792 Fault PIDs.
    • Was on-demand DTC B2792 retrieved? 

    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 when present as a continuous memory DTC only (DTC not retrieved on demand). The fault condition is not present at this time. GO to  P4.

  2. P2 CHECK DEPLOYABLE CIRCUITS FOR A CROSS LINK FAULT 
    • Key in OFF position.
    • Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Disconnect: RCM C310a and C310b.
    • Disconnect ALL of the affected  deployable devices.
    • Using the following table, measure the resistance between the circuits of the affected deployable devices.
      DEPLOYABLE DEVICES

      Squib Connector - Pin Circuit
      Driver air bag module squib 1
      • C310a-3
      • C310a-4
      • RR101 (YE/GN)
      • CR101 (VT/BN)
      Driver air bag module squib 2
      • C310a-15
      • C310a-16
      • RR102 (WH)
      • CR102 (BU)
      Passenger air bag module squib 1
      • C310a-1
      • C310a-2
      • CR103 (GY/BU)
      • RR103 (VT/GN)
      Passenger air bag module squib 2
      • C310a-5
      • C310a-6
      • CR104 (YE/GY)
      • RR104 (WH/BU)
      Driver seat side air bag module
      • C310b-7
      • C310b-8
      • RR105 (GY/YE)
      • CR105 (GN/BU)
      Passenger seat side air bag module
      • C310b-9
      • C310b-10
      • CR106 (VT/GY)
      • RR106 (YE/OG)
      Driver side air curtain module
      • C310b-21
      • C310b-22
      • CR109 (BN/BU)
      • RR109 (BU/GN)
      Passenger side air curtain module
      • C310b-1
      • C310b-2
      • CR111 (BN/WH)
      • RR111 (YE/VT)
      Driver safety belt retractor pretensioner
      • C310b-31
      • C310b-32
      • CR120 (BU/OG)
      • RR120 (BN/GN)
      Passenger safety belt retractor pretensioner
      • C310b-33
      • C310b-34
      • RR121 (VT)
      • CR121 (GY/VT)
    • Are the resistances greater than 10,000 ohms between the affected circuits? 

    Yes  : GO to P3.

    No  : REPAIR the affected circuits. GO to  P5.

  3. P3 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 Tools 418-F395 (2 required) to Driver Air Bag Module Electrical Connectors (If previously disconnected).
    • Connect: Restraint System Diagnostic Tools 418-F395 to Passenger Air Bag Module C256a and C256b (If previously disconnected).
    • Connect: Restraint System Diagnostic Tool 418-133 to Driver Seat Side Air Bag Module C327 (If previously disconnected).
    • Connect: Restraint System Diagnostic Tool 418-133 to Passenger Seat Side Air Bag Module C313 (If previously disconnected).
    • Connect: Restraint System Diagnostic Tool 418-F395 to Driver Safety Belt Retractor Pretensioner C323 (If previously disconnected).
    • Connect: Restraint System Diagnostic Tool 418-F395 to Passenger Safety Belt Retractor Pretensioner C3202 (If previously disconnected).
    • Connect: Restraint System Diagnostic Tool 418-133 to Driver Side Air Curtain Module C3055 (If previously disconnected).
    • Connect: Restraint System Diagnostic Tool 418-133 to Passenger Side Air Curtain Module C3056 (If previously disconnected).
    • Connect: RCM C310a and C310b.
    • Repower the system. Do not  prove out the system at this time. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Enter the following diagnostic mode on the scan tool: On-Demand Self Test/Retrieve and Record Continuous Memory DTCs.
    • Enter the following diagnostic mode on the scan tool: View and Record DTC B2792 Fault PIDs.
    • Was on-demand DTC B2792 retrieved? 

    Yes  : INSTALL and CONFIGURE a new RCM. REFER to RESTRAINTS CONTROL MODULE (RCM) . GO to  P5.

    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  P5.

  4. P4 CHECK FOR AN INTERMITTENT FAULT 
    • Key in OFF position.
    • Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • If a cross link fault for driver air bag squib 1 or squib 2 is present continuous:
      • Remove the driver air bag module. Refer to DRIVER AIR BAG MODULE .
      • Connect Restraint System Diagnostic Tools 418-F395 (2 required) to driver air bag module electrical connectors.
    • If a cross link fault for passenger air bag module squib 1 or squib 2 is present continuous:
    • If a cross link fault for driver seat side air bag is present continuous:
      • Disconnect the driver seat side air bag module C327.
      • Connect Restraint System Diagnostic Tool 418-133 to driver seat side air bag module C327.
    • If a cross link fault for passenger seat side air bag is present continuous:
      • Disconnect the passenger seat side air bag module C313.
      • Connect Restraint System Diagnostic Tool 418-133 to passenger seat side air bag module C313.
    • If a cross link fault for driver side air curtain module is present continuous:
      • Disconnect the driver side air curtain module C3055.
      • Connect Restraint System Diagnostic Tool 418-133 to driver side air curtain module C3055.
    • If a cross link fault for passenger side air curtain module is present continuous:
      • Disconnect the passenger side air curtain module C3056.
      • Connect Restraint System Diagnostic Tool 418-133 to passenger side air curtain module C3056.
    • If a cross link fault for driver safety belt retractor pretensioner is present continuous:
      • Disconnect the driver safety belt retractor pretensioner C323.
      • Connect Restraint System Diagnostic Tool 418-F395 to driver safety belt retractor pretensioner C323.
    • If a cross link fault for passenger safety belt retractor pretensioner is present continuous:
      • Disconnect the passenger safety belt retractor pretensioner C3202.
      • Connect Restraint System Diagnostic Tool 418-F395 to passenger safety belt retractor pretensioner C3202.
    • Repower the system. Do not  prove out the system at this time. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Enter the following diagnostic mode on the scan tool: On-Demand Self Test/Retrieve and Record Continuous Memory DTCs.
    • Enter the following diagnostic mode on the scan tool: View and Record DTC B2792 Fault PIDs.
    • Was on-demand DTC B2792 retrieved? 

    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. GO to  P2.

    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 P5.

  5. P5 CHECK FOR ADDITIONAL DTCs 
    • Refer to the continuous memory DTCs recorded during Step  P1.
    • Were any continuous memory DTCs retrieved during Step   P1 ? 

    Yes  : Do not clear any DTCs until all DTCs have been resolved. GO to the SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSTIC TROUBLE CODE (DTC) TABLE  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 . REPOWER the system. REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING . PROVE OUT the system. CLEAR all OCS module and RCM DTCs.

scientia non olet · About LEMON Manuals