Diagnostic Test
- CHECK FOR ACTIVE INTERNAL FAULTS, IGNITION FAULTS, AND BATTERY FAULTS IN THE OCCUPANT CLASSIFICATION MODULE (OCM) NOTE: Ensure the battery is fully charged.
- With the scan tool, read the OCM DTC.
Does the scan tool display any active DTC relating to internal faults, ignition faults, or battery faults?
Yes
- Perform the appropriate DTC. See DTC-Based Diagnostics/MODULE, Occupant Classification (OCM) - Diagnosis and Testing .
No
- Go to step 2
- With the scan tool, read the OCM DTC.
- VERIFY B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH IS ACTIVE
Does the scan tool display active: B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH DTC?
Yes
- Go to step 3
No
- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. Refer to DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure .
- VERIFY SEAT POSITION SENSOR CIRCUITS SHORT TO VOLTAGE 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.
- Disconnect the Driver Seat Track Position Sensor connector.
- Disconnect the OCM 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.
- Measure the (R261) Driver Seat Position Sensor Data circuit voltage between the Driver Seat Position Sensor connector cavity 1 and ground.
- Measure the (R263) Driver Seat Position Sensor Voltage circuit voltage between the Driver Seat Position Sensor connector cavity 2 and ground.
Is there voltage present on either circuit?
Yes
- Go to step 4
No
- Go to step 6
- VERIFY SEAT POSITION SENSOR CIRCUITS SHORT TO VOLTAGE
- Disconnect the C311 body harness to Passenger Seat connector.
- Measure the (R261) Driver Seat Position Sensor Data circuit voltage between the Driver Seat Position Sensor connector cavity 1 and ground.
- Measure the (R263) Driver Seat Position Sensor Voltage circuit voltage between the Driver Seat Position Sensor connector cavity 2 and ground.
Is there any voltage present on either circuit?
Yes
- Go to step 5
No
- Replace the Passenger seat wiring in accordance with the Service Information.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure .
NOTE: Do not attempt to repair the seat wiring.
- VERIFY SEAT POSITION SENSOR CIRCUITS SHORT TO VOLTAGE
- Disconnect the C310 body harness to Driver Seat connector.
- Measure the (R261) Driver Seat Position Sensor Data circuit voltage between the Driver Seat Position Sensor connector cavity 1 and ground.
- Measure the (R263) Driver Seat Position Sensor Voltage circuit voltage between the Driver Seat Position Sensor connector cavity 2 and ground.
Is there any voltage present on either circuit?
Yes
- Replace the Driver seat wiring in accordance with the Service Information.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure .
NOTE: Do not attempt to repair the seat wiring.No
- Replace the Body Harness between the Driver and Passenger Seat in accordance with the Service Information.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure .
NOTE: Do not attempt to repair the seat wiring.
- CHECK OPERATION OF THE DRIVER SEAT TRACK POSITION SENSOR 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.
- Replace the Driver Seat Track Position Sensor.
- Reconnect all disconnected components except the battery.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.
- Connect the scan tool to the Data Link Connector - use the most current software available.
- Use the scan tool and erase all codes in the OCM.
- Turn the Ignition Off, and wait 15 seconds before turning the Ignition On.
- Wait one minute, and read active codes.
Did the active B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH DTC return?
Yes
- Replace the OCM in accordance with the Service Information.
- Perform the OCM REZERO. Refer to DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure .
WARNING: If the Occupant Classification Module (OCM) is dropped at any time, it must be replaced. Failure to take the proper precautions can result in accidental airbag deployment and serious or fatal injury.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.CAUTION: Disconnecting or connecting the OCM connectors with the battery connected permanently damages the OCM.No
- Repair is complete.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure .