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Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> Restraints >> Seat Belts >> Air Bag Restraint System - Electrical Diagnostics >> DTC Troubleshooting >> B1B8F-Driver Seat Track Position Sensor Circuit Open >> Diagnostic Procedure

Diagnostic Procedure

  1. CHECK FOR ACTIVE INTERNAL FAULTS, IGNITION FAULTS, AND BATTERY FAULTS IN THE OCCUPANT RESTRAINT CONTROLLER (ORC) 
    1. Using a scan tool, read Occupant Restraint Controller (ORC) DTCs.

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

      Yes 

      No 

      • Go to step  2
  2. VERIFY THAT DTC B1B8F-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT OPEN IS ACTIVE 

    Does the scan tool display active B1B8F-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT OPEN?

    Yes 

    • Go to step  3

    No 

  3. INSPECT DRIVER SEAT HARNESS WIRES AND CONNECTORS 
    WARNING: Turn the ignition off, disconnect the 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 driver seat harness wiring and connectors. Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.

      Are any of these conditions present?

      Yes 

      No 

      • Go to step  4
  4. VERIFY THE DRIVER SEAT HARNESS IS ROUTED CORRECTLY 
    1. Verify the driver seat harness is routed correctly.

      Is the driver seat harness routed correctly?

      Yes 

      • Go to step  5

      No 

  5. CHECK FOR DTC B1B8F-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT OPEN WITH DRIVER SEAT TRACK POSITION SENSOR DISCONNECTED 
    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 Driver Seat Track Position Sensor connector.
      WARNING: Turn the ignition on, then reconnect the battery and wait two minutes to proceed. Failure to follow these instructions may result in possible serious or fatal injury.
    2. Wait two minutes, then using a scan tool, read ORC DTCs.

      Does the scan tool display: B1B8F-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT OPEN?

      Yes 

      • Go to step  6

      No 

        WARNING: Turn the ignition off, disconnect the battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
      • Replace the driver seat track position sensor according to the Service Information.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure .
  6. CHECK (R261) DRIVER SEAT POSITION SENSOR DATA CIRCUIT AND (R263) DRIVER SEAT POSITION SENSOR VOLTAGE CIRCUIT FOR A SHORT TO VOLTAGE 
    Fig 1: Checking Driver Seat Position Sensor Data Circuit & Driver Seat Position Sensor Voltage Circuit For A Short To Voltage
    GC0096237Courtesy of CHRYSLER LLC
    WARNING: Turn the ignition off, disconnect the battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
    1. Disconnect the ORC C1 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 (R261) driver seat position sensor data circuit between the driver seat track position sensor connector and ground.
    3. Measure the voltage of the (R263) Driver Seat Position Sensor Voltage circuit between the driver seat track position connector and ground.

      Is the voltage above 0.2 of a Volt for either circuit?

      Yes 

        NOTE: Do not attempt to repair the driver seat harness. Replace the driver seat harness if any of these conditions exist.
      • WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
      • Replace the driver seat harness according to the Service Information.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure .

      No 

      • Go to step  7
  7. CHECK (R261) DRIVER SEAT POSITION SENSOR DATA CIRCUIT FOR A SHORT TO (R263) DRIVER SEAT POSITION SENSOR VOLTAGE CIRCUIT 
    Fig 2: Checking Driver Seat Position Sensor Data Circuit For A Short To Driver Seat Position Sensor Voltage Circuit
    GC0096238Courtesy of CHRYSLER LLC
    WARNING: Turn the ignition off, disconnect the battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
    1. Measure the resistance between the (R261) driver seat position sensor data circuit and the (R263) Driver Seat Position Sensor Voltage circuit in the Driver Seat Track Position Sensor connector.

      Is the resistance below 10k Ohms?

      Yes 

      No 

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