Diagnostic Test
- CHECK FOR AN ACTIVE DTC
- With the scan tool, read ORC DTCs and record on the repair order.
- Record the Environmental Data.
- With the scan tool, erase DTCs.
- Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
- With the scan tool, read ORC DTCs.
Did the DTC return?
Yes
- Go To 2
No
- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. Refer to RESTRAINTS SYSTEM INTERMITTENT TEST .
- Probing of the circuit cavities at the ORC Module body harness connectors or vehicle connectors is only to be done with a approved test lead from the test lead 10159-6 or the use of Breakout Box 8443-55 to prevent vehicle wiring harness connector damage during diagnostic procedures.
- CHECK THE (R283) PASSENGER OCCUPANT DETECTOR SIGNAL CIRCUIT FOR A SHORT TO THE (R284) PASSENGER OCCUPANT DETECTOR SENSOR RETURN CIRCUIT NOTE:
Repair of the wiring is only to be done on the seat body harness side of the connector. If the wiring fault is in the component side of the wiring harness routed into the seat cushion a ODS sensor replacement is to be performed. Refer to SENSOR, OCCUPANT DETECTION, REMOVAL .
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 underseat harness connector and ORC connectors.
- Using the 8443-55 tool and a DVOM, test for a short between the (R283) and (R284) circuits.
Is the resistance below 3 ohms?
Yes
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.
- Repair the short between the (R283) and (R284) circuits.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .
No
- Go To 3
- CHECK THE (R283) PASSENGER OCCUPANT DETECTOR SIGNAL CIRCUIT FOR A SHORT TO THE (R284) PASSENGER OCCUPANT DETECTOR SENSOR RETURN CIRCUIT IN THE SEAT HARNESS 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.
NOTE:Check connectors - Clean/Repair as necessary.
- Disconnect the passenger inline underseat harness connector.
- If the vehicle is equipped with the keyless ignition, follow this ignition on warning.WARNING:
Disconnect the 12-volt battery wait two minutes before proceeding, remove the ORC fuses, connect the 12-volt battery, wait two minutes before proceeding. Cycle the ignition to the On position, then reconnect the ORC fuses. Wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
- If the vehicle is equipped with the standard key ignition, follow this ignition on warning.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 resistance between the (R283) and (R284) circuits.
Is the resistance below 3 ohms?
Yes
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.
- Repair the short between the (R283) Passenger Occupant Detector Signal Circuit and the (R284) Occupant Detector Sensor Return circuit in the underseat harness.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .
No
- Go To 4
- CHECK OPERATION OF THE PASSENGER OCCUPANT DETECTOR 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 Passenger Occupant Detector Sensor in accordance with the Service Information. Refer to SENSOR, OCCUPANT DETECTION, REMOVAL .
- Remove any special tools or jumper wires and reconnect all previously disconnected components - except the Battery.
- If the vehicle is equipped with the keyless ignition, follow this ignition on warning.WARNING:
Disconnect the 12-volt battery wait two minutes before proceeding, remove the ORC fuses, connect the 12-volt battery, wait two minutes before proceeding. Cycle the ignition to the On position, then reconnect the ORC fuses. Wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
- If the vehicle is equipped with the standard key ignition, follow this ignition on warning.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 the ORC stored codes.
- Turn the Ignition Off and wait 15 seconds before turning the Ignition On.
- Wait one minute and read active codes and if there are none present read the stored codes.
Does the scan tool display active B2734-2B-PASSENGER OCCUPANT DETECTION SENSOR CIRCUIT - WIRES SHORTED TOGETHER DTC?
Yes
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.
WARNING:If the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Failure to follow these instructions may result in possible serious or fatal injury.
- Replace the ORC in accordance with the Service Information. Refer to MODULE, OCCUPANT RESTRAINT CONTROLLER, REMOVAL .
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .
No
- Repair is complete.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .