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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 788 (Supplemental Restraint System) >> Diagnosis And Testing >> Pinpoint Tests - Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) >> Pinpoint Tests >> Pinpoint Test D: DTC B2290 - Occupant Classification System Fault >> Pinpoint Test D: DTC B2290 - Occupant Classification System Fault

Pinpoint Test D: DTC B2290 - Occupant Classification System 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. D1 CHECK FOR CONTINUOUS OR 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: OCS Module On-Demand Self Test/Retrieve and Record Continuous Memory DTCs.
    • Enter the following diagnostic mode on the scan tool: View and Record DTC B2290 Fault PIDs.
    • Was on-demand DTC B2290 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 D2.

    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  D14.

  2. D2 CHECK THE SEAT WIRING AND CONNECTORS 
    • Key in OFF position.
    • Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Carry out a thorough visual inspection of the OCS system wiring, terminals and connectors and the related seat wiring harness and body wiring harness terminals and connectors.
    • Were any problems noted? 

    Yes  : REPAIR the seat connectors and wiring as needed. GO to  D15.

    No  : Using the fault PIDs recorded in Step  D1, GO to the appropriate pinpoint test step.

    For OCS rail 1 (inboard) or OCS rail 2 (outboard) internal fault, INSTALL a new OCS sensor. REFER to OCCUPANT CLASSIFICATION SENSOR .

    For OCS rail 1 (inboard) communication/open fault, GO to D3.

    For OCS rail 2 (outboard) communication/open fault, GO to  D6.

    For OCS rail 1 (inboard) short to ground fault, GO to  D9.

    For OCS rail 2 (outboard) short to ground fault, GO to  D10.

    For OCS rail 1 (inboard) short to battery fault, GO to  D11.

    For OCS rail 2 (outboard) short to battery fault, GO to  D12.

  3. D3 CHECK CIRCUIT VR212 (YE/GN) AND CIRCUIT RR140 (GN/OG) FOR AN OPEN 
    • Disconnect: OCS Module C3159.
    • Disconnect: OCS Rail 1 C3294.
    • Measure the resistance between OCS module C3159-4, circuit VR212 (YE/GN), harness side and OCS rail 1 C3294-2, circuit VR212 (YE/GN), harness side; and between OCS module C3159-5, circuit RR140 (GN/OG), harness side and OCS rail 1 C3294-1, circuit RR140 (GN/OG), harness side.
      Fig 1: Checking Circuit VR212 (YE/GN) And Circuit RR140 (GN/OG) For Open
      G04683842Courtesy of FORD MOTOR CO.
    • Are the resistances less than 0.5 ohm? 

    Yes  : GO to D4.

    No  : REPAIR circuit VR212 (YE/GN) or circuit RR140 (GN/OG). GO to  D15.

  4. D4 CHECK CIRCUIT VR212 (YE/GN) AND CIRCUIT RR140 (GN/OG) FOR A SHORT 
    • Measure the resistance between OCS module C3159-4, circuit VR212 (YE/GN), harness side and OCS module C3159-5, circuit RR140 (GN/OG), harness side.
      Fig 2: Checking Circuit VR212 (YE/GN) And Circuit RR140 (GN/OG) For Short
      G04683843Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 1,000,000 ohms? 

    Yes  : GO to D5.

    No  : REPAIR circuit VR212 (YE/GN) and circuit RR140 (GN/OG). GO to  D15.

  5. D5 CHECK THE OCS ECU 

    Yes  : INSTALL a new OCS module. Refer to OCCUPANT CLASSIFICATION MODULE . GO to  D15.

    No  : Fault corrected. GO to  D15.

  6. D6 CHECK CIRCUIT VR211 (WH/BN) AND CIRCUIT RR141 (VT/BN) FOR AN OPEN 
    • Disconnect: OCS Module C3159.
    • Disconnect: OCS Sensor 2 C3293.
    • Measure the resistance between OCS module C3159-2, circuit VR211 (WH/BN), harness side and OCS sensor 2 C3293-2, circuit VR211 (WH/BN), harness side; and between OCS module C3159-3, circuit RR141 (VT/BN), harness side and OCS sensor 2 C3293-1, circuit RR141 (VT/BN), harness side.
      Fig 3: Checking Circuit VR211 (WH/BN) And Circuit RR141 (VT/BN) For Open
      G04683844Courtesy of FORD MOTOR CO.
    • Are the resistances less than 0.5 ohm? 

    Yes  : GO to D7.

    No  : REPAIR circuit VR211 (WH/BN) or circuit RR141 (VT/BN). GO to  D15.

  7. D7 CHECK CIRCUIT VR211 (WH/BN) AND CIRCUIT RR141 (VT/BN) FOR A SHORT 
    • Measure the resistance between OCS module C3159-2, circuit VR211 (WH/BN), harness side and OCS module C3159-3, circuit RR141 (VT/BN), harness side.
      Fig 4: Checking Circuit VR211 (WH/BN) And Circuit RR141 (VT/BN) For Short
      G04683845Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 1,000,000 ohms? 

    Yes  : GO to D8.

    No  : REPAIR circuit VR211 (WH/BN) and circuit RR141 (VT/BN). GO to  D15.

  8. D8 CHECK THE OCS MODULE 

    Yes  : INSTALL a new OCS module. Refer to OCCUPANT CLASSIFICATION MODULE . GO to  D15.

    No  : Fault corrected. GO to  D15.

  9. D9 CHECK CIRCUIT VR212 (YE/GN) AND CIRCUIT RR140 (GN/OG) FOR A SHORT TO GROUND 
    • Disconnect: OCS Module C3159.
    • Measure the resistance between OCS module C3159-4, circuit VR212 (YE/GN), harness side and ground; and between OCS module C3159-5, circuit RR140 (GN/OG), harness side and ground.
      Fig 5: Checking Circuit VR212 (YE/GN) And Circuit RR140 (GN/OG) For Short To Ground
      G04683846Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 1,000,000 ohms? 

    Yes  : GO to  D13.

    No  : REPAIR circuit VR212 (YE/GN) or circuit RR140 (GN/OG). GO to  D15.

  10. D10 CHECK CIRCUIT VR212 (YE/GN) AND CIRCUIT RR141 (VT/BN) FOR A SHORT TO GROUND 
    • Disconnect: OCS Module C3159.
    • Measure the resistance between OCS module C3159-2, circuit VR211 (WH/BN), harness side and ground; and between OCS module C3159-3, circuit RR141 (VT/BN), harness side and ground.
      Fig 6: Checking Circuit VR212 (YE/GN) And Circuit RR141 (VT/BN) For Short To Ground
      G04683847Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 1,000,000 ohms? 

    Yes  : GO to  D13.

    No  : REPAIR circuit VR211 (WH/BN) or circuit RR141 (VT/BN). GO to  D15.

  11. D11 CHECK CIRCUIT VR212 (YE/GN) AND CIRCUIT RR140 (GN/OG) FOR A SHORT TO BATTERY 
    • Vehicles equipped with seat side air bags:
      • Disconnect passenger seat side air bag module C313.
      • Connect restraint system diagnostic tool 418-133 to passenger seat side air bag module C313
    • Disconnect: OCS Module C3159.
    • Repower the system. Do not  prove out the system at this time. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Key in ON position.
    • Measure the voltage between OCS module C3159-4, circuit VR212 (YE/GN), harness side and ground; and between OCS module C3159-5, circuit RR140 (GN/OG), harness side and ground.
      Fig 7: Checking Circuit VR212 (YE/GN) And Circuit RR140 (GN/OG) For Short To Battery
      G04683848Courtesy of FORD MOTOR CO.
    • Are the voltages less than 0.2 volts? 

    Yes  : GO to  D13.

    No  : REPAIR circuit VR212 (YE/GN) or circuit RR140 (GN/OG). GO to  D15.

  12. D12 CHECK CIRCUIT VR211 (WH/BN) AND CIRCUIT RR141 (VT/BN) FOR A SHORT TO BATTERY 
    • Vehicles equipped with seat side air bags:
      • Disconnect passenger seat side air bag module C313.
      • Connect restraint system diagnostic tool 418-133 to passenger seat side air bag module C313
    • Disconnect: OCS Module C3159.
    • Repower the system. Do not  prove out the system at this time. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Key in ON position.
    • Measure the voltage between OCS module C3159-2, circuit VR211 (WH/BN), harness side and ground; and between OCS module C3159-3, circuit RR141 (VT/BN), harness side and ground.
      Fig 8: Checking Circuit VR211 (WH/BN) And Circuit RR141 (VT/BN) For Short To Battery
      G04683849Courtesy of FORD MOTOR CO.
    • Are the voltages less than 0.2 volts? 

    Yes  : GO to D13.

    No  : REPAIR circuit VR211 (WH/BN) or circuit RR141 (VT/BN). GO to  D15.

  13. D13 CHECK OCS SYSTEM 
    NOTE: Make sure all restraint system diagnostic tools, sensor electrical connectors and the RCM electrical connector are connected before carrying out the on-demand self test. If not, erroneous DTCs will be recorded.

    Yes  : INSTALL a new OCS module. REFER to OCCUPANT CLASSIFICATION MODULE . GO to  D15.

    No  : Fault corrected. GO to  D15.

  14. D14 CHECK FOR AN INTERMITTENT FAULT 
    • Key in OFF position.
    • Vehicles equipped with seat side air bags:
    • 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: OCS Module On-Demand Self Test/Retrieve and Record Continuous Memory DTCs.
    • Enter the following diagnostic mode on the scan tool: View and Record DTC B2290 Fault PIDs.
    • Was on-demand DTC B2290 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  D2.

    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. ACTIVATE other systems in the same wire harness. REPAIR any intermittent concerns found. GO to D15.

  15. D15 CHECK FOR ADDITIONAL DTCs 
    • Refer to the OCS module continuous memory DTCs recorded during Step  D1.
    • Were any continuous memory DTCs retrieved during Step   D1 ? 

    Yes  : Do not clear any DTCs until all DTCs have been resolved. GO to the OCCUPANT CLASSIFICATION SYSTEM (OCS) 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.

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