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Diagnostic Test

  1. CHECK FOR ACTIVE INTERNAL FAULTS, IGNITION FAULTS, AND BATTERY FAULTS IN THE OCCUPANT CLASSIFICATION MODULE (OCM) 
    NOTE:

    Make sure that the battery is fully charged.

    1. Turn the ignition on then off and then on again.
    2. With the scan tool, read Occupant Classification Module (OCM) DTCs.

      Does the scan tool display any active DTCs relating to internal faults, ignition faults, or battery faults?

      Yes 

      No 

      • Go To  2.
  2. VERIFY THAT DTC B1B7E-PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT LOW IS ACTIVE 
    1. With the scan tool, read the OCM DTCs.

      Does the scan tool display active B1B7E-PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT LOW DTC?

      Yes 

      • Go To  3.

      No 

  3. VERIFY THAT DTC B1B7F-PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT HIGH AND B1B7E-PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT LOW ARE BOTH ACTIVE 
    1. With the scan tool, read the OCM DTCs.

      Does the scan tool display active B1B7F-PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT HIGH DTC?

      Yes 

      • Refer to DIAGNOSIS AND TESTING  and perform the B1B7F-PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT HIGH diagnostic test.

      No 

      • Go To  4.
  4. INSPECT PASSENGER SEAT HARNESS WIRES AND CONNECTORS 
    WARNING:

    Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

    1. Using the wiring diagram / schematic as a guide, inspect the Passenger Seat Harness wiring and connectors. Look for chaffed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.

      Are any of these conditions present?

      Yes 

        NOTE:

        Do not attempt to repair the Seat Harness. Replace the Seat Harness if the condition inspecting or testing for is present in the Seat Harness.

      • Replace the Passenger Seat Harness in accordance with the Service Information.
      • Refer to STANDARD PROCEDURE  and perform the RE-ZERO OCM SEAT WEIGHT SENSORS diagnostic procedure.

      No 

      • Go To  5.
  5. VERIFY THAT PASSENGER SEAT HARNESS IS ROUTED CORRECTLY 
    1. Verify that the Passenger Seat Harness is routed correctly.

      Is the Passenger Seat Harness routed correctly?

      Yes 

      • Go To  6.

      No 

      • Reroute the Passenger Seat Harness as necessary.
      • Refer to STANDARD PROCEDURE  and perform the RE-ZERO OCM SEAT WEIGHT SENSORS diagnostic procedure.
  6. CHECK VOLTAGE OF (R701) SEAT WEIGHT SENSOR 5-VOLT CIRCUIT 
    Fig 1: Measuring Voltage Of Seat Weight Sensor 5-Volt Circuit
    GC0101800Courtesy of CHRYSLER LLC
    1. Disconnect the Right-Front Seat Weight Sensor connector.
      WARNING:

      Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

    2. Measure the voltage of the (R701) Seat Weight Sensor 5-volt circuit.

      Is the voltage above 4.8 volts?

      Yes 

      • Go To  7.

      No 

      • Go To  9.
  7. CHECK (R718) RT-FT SEAT WEIGHT SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    Fig 2: Checking Right-Front Seat Weight Sensor Signal Circuit For A Short To Ground
    GC0101801Courtesy of CHRYSLER LLC
    WARNING:

    Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

    1. Disconnect the OCM C2 connector.
    2. Measure the resistance of the (R718) RT-FT Seat Weight Sensor Signal circuit between the OCM C2 connector cavity 5 and ground.

      Is the resistance below 5.0 Ohms?

      Yes 

        NOTE:

        Do not attempt to repair the Seat Harness. Replace the Seat Harness if the condition inspecting or testing for is present in the Seat Harness.

      • Replace the Passenger Seat Harness in accordance with the Service Information.
      • Refer to STANDARD PROCEDURE  and perform the RE-ZERO OCM SEAT WEIGHT SENSORS diagnostic procedure.

      No 

      • Go To  8.
  8. CHECK (R718) RT-FT SEAT WEIGHT SENSOR SIGNAL CIRCUIT FOR AN OPEN 
    Fig 3: Checking Right-Front Seat Weight Sensor Signal Circuit For An Open
    GC0101802Courtesy of CHRYSLER LLC
    1. Measure the resistance of the (R718) RT-FT Seat Weight Sensor Signal circuit between the OCM C2 connector cavity 5 and the Right-Front Seat Weight Sensor connector cavity 2.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Replace the Right-Front Seat Weight Sensor in accordance with the Service Information.
      • Refer to STANDARD PROCEDURE  and perform the RE-ZERO OCM SEAT WEIGHT SENSORS diagnostic procedure.
      • If DTC B1B7E-PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT LOW returns active, Go To  10.

      No 

        NOTE:

        Do not attempt to repair the Seat Harness. Replace the Seat Harness if the condition inspecting or testing for is present in the Seat Harness.

      • Replace the Passenger Seat Harness in accordance with the Service Information.
      • Refer to STANDARD PROCEDURE  and perform the RE-ZERO OCM SEAT WEIGHT SENSORS diagnostic procedure.
  9. CHECK (R701) SEAT WEIGHT SENSOR 5-VOLT CIRCUIT FOR AN OPEN 
    Fig 4: Checking Seat Weight Sensor 5-Volt Circuit For An Open
    GC0101803Courtesy of CHRYSLER LLC
    WARNING:

    Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

    1. Disconnect the OCM C2 connector.
    2. Measure the resistance of the (R701) Seat Weight Sensor 5-volt circuit between the OCM C2 connector cavity 1 and the Right-Front Seat Weight Sensor connector cavity 3.

      Is the resistance below 5.0 Ohms?

      Yes 

        WARNING:

        If the Occupant Classification Module (OCM) is dropped at any time, it must be replaced. Failure to take the proper precautions could result in accidental airbag deployment and may result in possible serious or fatal injury.

      • Replace the OCM in accordance with the Service Information.
      • Refer to STANDARD PROCEDURE  and perform the RE-ZERO OCM SEAT WEIGHT SENSORS diagnostic procedure.

      No 

        NOTE:

        Do not attempt to repair the Seat Harness. Replace the Seat Harness if the condition inspecting or testing for is present in the Seat Harness.

      • Replace the Passenger Seat Harness in accordance with the Service Information.
      • Refer to STANDARD PROCEDURE  and perform the RE-ZERO OCM SEAT WEIGHT SENSORS diagnostic procedure.
  10. REPLACE THE OCCUPANT CLASSIFICATION MODULE 
    WARNING:

    Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

    View repair

    Yes 

      WARNING:

      If the Occupant Classification Module (OCM) is dropped at any time, it must be replaced. Failure to take the proper precautions could result in accidental airbag deployment and may result in possible serious or fatal injury.

    • Replace the OCM in accordance with the Service Information.
    • Refer to STANDARD PROCEDURE  and perform the RE-ZERO OCM SEAT WEIGHT SENSORS diagnostic procedure.
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