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B1CDC






B1CDC-PASSENGER OCCUPANT DETECTOR CIRCUIT HIGH

Special Tools:






NOTE: The ORC module cannot recognize between the different faults so it will set a High code. The diagnosis is to check the ODS signal and return circuits for all faults (short to voltage, open, short to ground, and shorted together).





For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The Occupant Detection Sensor (ODS) is a resistive sensor that is located in the front passenger seat. This sensor is only used for passenger seatbelt reminder. The seat sensor assumes a passenger is present when a minimum of 53.5 pounds (20kg) of weight is placed in the seat. The resistance of the sensor decreases, signaling to the ORC module that a passenger is present. The ORC then transmits this information to the Instrument cluster over the CAN bus. The passenger is only reminded to buckle up if the passenger seat occupant minimum weight threshold determined by the ODS is surpassed and the seat belt buckle is still not latched. The ODS receives battery voltage and clean ground through dedicated sensor plus and minus circuits from the ORC. The ORC receives, processes, and continuously monitors (monitor rate of 500 ms) the analog signal from the ODS. The ODS component is not repairable, if determined inoperable, it would require to be replaced with a new component. The seatbelt warning lamp will not set for this fault.

- When Monitored:
The ORC receives, processes, and continuously monitors (monitor rate of 500 ms) the analog signal from the ODS.

- Set Condition:
The ORC detects High voltage on the (R283) Passenger Occupant Detector Sensor Signal circuit for 2.5 - 5 seconds. The DTC will not latch for the entire ignition cycle. The code goes from Active to Stored 2.5 - 5 seconds after the code setting criteria is gone. This code also covers the Open fault.





Always Perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Testing and Inspection.

1.

NOTE: The seat belt warning lamp in the instrument cluster does not set to indicate a passenger seat belt reminder feature.

NOTE: The use of a approved special tool or Digital Multimeter such as a Fluke Meter that will not apply more than 20 milliamperes to a circuit are the only measurement tools to be used.
VERIFY ACTIVE DTC

NOTE: Make sure the battery is fully charged.

1. Turn the ignition on.
2. With the scan tool, read the ORC DTCs

NOTE: Diagnosing for the high code but also will be checking for an Open fault in both the (R283) signal and (R284) return circuits.

Does the scan tool display active B1CDC-PASSENGER OCCUPANT DETECTOR CIRCUIT HIGH DTC?

Yes

- Go To 2

No

- Perform the AIRBAG SYSTEM INTERMITTENT TEST. Initial Inspection and Diagnostic Overview.

2. CHECK THE (R283) PASSENGER OCCUPANT DETECTOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE





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. Occupant Detection Sensor - 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.

1. Keep the Passenger Occupant Detector Sensor harness connector in the seat cushion connected.
2. Keep the passenger inline harness underseat connector connected.
3. Keep the Occupant Detection Sensor (ODS) in the passenger seat cushion connected.
4. Disconnect the ORC harness connectors.
5. Connect the SRS Load Tool Adapter to the ORC harness connectors.

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.

6. Measure the voltage of the (R283) Passenger Occupant Detector Signal circuit at the appropriate terminal of the SRS Load Tool Adapter.

Is there any voltage present?

Yes

- NOTE: The ODS sensor is to be replaced whenever a short to voltage fault has been found in the ODS harness even after the harness repair has been performed.

- 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 (R283) Passenger Occupant Detector Signal circuit for a short to voltage.
- Replace the ODS sensor. Occupant Detection Sensor - Removal.
- Perform the AIRBAG SYSTEM VERIFICATION TEST. Airbag System Verification Test.

No

- Go To 3

3. CHECK THE (R283) PASSENGER OCCUPANT DETECTOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE BETWEEN THE ORC AND THE PASSENGER INLINE UNDERSEAT CONNECTOR





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.

1. Disconnect the passenger underseat harness 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 between ground and the (R283) Passenger Occupant Detector Signal circuit at the appropriate terminal of the SRS Load Tool Adapter.

Is there voltage present?

Yes

- NOTE: The ODS sensor is to be replaced whenever a short to voltage fault has been found in the ODS harness even after the harness repair has been performed.

- 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 to voltage in the (R283) Passenger Occupant Detector Signal circuit located between the ORC and the passenger underseat jumper harness connector.
- Replace the ODS Sensor. Occupant Detection Sensor - Removal.
- Perform the AIRBAG SYSTEM VERIFICATION TEST. Airbag System Verification Test.

No

- Go To 4

4. CHECK THE (R283) PASSENGER OCCUPANT DETECTOR SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE IN THE UNDERSEAT JUMPER 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.

1. Connect the passenger seat underseat connector.

NOTE: Confirm the connector is seated firmly and the lock tab is fully seated.

2. Access the Passenger Occupant Detector Sensor (ODS) harness connector located at the passenger seat cushion.
3. Disconnect the Passenger Occupant Detector Sensor (ODS) harness 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.

4. Measure the voltage between ground and the (R283) Passenger Occupant Detector Signal circuit at the appropriate terminal of the SRS Load Tool Adapter.

Is there any voltage present?

Yes

- NOTE: The ODS sensor is to be replaced whenever a short to voltage fault has been found in the ODS harness even after the harness repair has been performed.

- 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 to voltage in the (R283) Passenger Occupant Detector Signal Circuit located between the passenger underseat connector and the Passenger Occupant Detector Sensor connector.
- Replace the ODS Sensor. Occupant Detection Sensor - Removal.
- Perform the AIRBAG SYSTEM VERIFICATION TEST. Airbag System Verification Test.

No

- Go To 5

5. CHECK THE (R283) PASSENGER OCCUPANT DETECTOR SENSOR SIGNAL CIRCUIT AND (R284) PASSENGER OCCUPANT DETECTOR SENSOR RETURN CIRCUIT FOR AN OPEN OR HIGH RESISTANCE BETWEEN THE ORC AND THE PASSENGER UNDERSEAT HARNESS CONNECTOR





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 passenger underseat harness connector.
2. Measure the resistance of the (R283) Occupant Detector Sensor Signal circuit from cavity 11 of the C304 underseat harness connector to the 32 way side of the SRS Load Tool Adapter cavity 23.
3. Measure the resistance of the (R284) Occupant Detector Sensor Return circuit from cavity 12 of the C304 underseat harness connector to the 32 way side of the SRS Load Tool Adapter cavity 24.

Is the resistance for either circuit below 1.0 Ohm?

Yes

- Go To 6

No

- Repair the (R283) Occupant Detector Sensor Signal circuit or (R284) Occupant Detector Sensor Return circuit for an open or high resistance.
- Perform the AIRBAG SYSTEM VERIFICATION TEST. Airbag System Verification Test.

6. CHECK THE (R283) PASSENGER OCCUPANT DETECTOR SENSOR SIGNAL CIRCUIT AND (R284) PASSENGER OCCUPANT DETECTOR RETURN CIRCUIT FOR AN OPEN OR HIGH RESISTANCE IN THE SEATBACK JUMPER 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.

1. Reconnect the C304 underseat harness connector.

NOTE: Inspect terminal pins and verify the C304 connector is fully seated correctly and that the connector locking tab is correctly in place.

2. Access the Passenger Occupant Detector Sensor located in the passenger seat cushion.
3. Disconnect the Passenger Occupant Detector Sensor harness connector.
4. Measure the resistance of the (R283) Occupant Detector Sensor Signal circuit from cavity 1 of the ODS connector to the 32 way side of the SRS Load Tool Adapter cavity 23.
5. Measure the resistance of the (R284) Occupant Detector Sensor Return circuit from cavity 2 of the ODS connector to the 32 way side of the SRS Load Tool Adapter cavity 24.

Is the resistance for either circuit below 1.0 Ohm?

Yes

- Go To 7

No

- 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. Occupant Detection Sensor - Removal .

- Repair the (R283) Passenger Occupant Detector Signal circuit or (R284) Occupant Detector Sensor Return circuit in the body harness for an open or high resistance.
- Perform the AIRBAG SYSTEM VERIFICATION TEST. Airbag System Verification Test.

7. CHECK THE (R283) PASSENGER OCCUPANT DETECTOR SENSOR SIGNAL CIRCUIT AND (R284) PASSENGER OCCUPANT DETECTOR SENSOR RETURN CIRCUIT FOR AN OPEN OR HIGH RESISTANCE WITH THE ODS HARNESS FULLY CONNECTED





NOTE: Confirm the connector is seated firmly and the lock tab is fully seated.

1. Connect the Occupant Detector Sensor (ODS), verify all in-line connections are secure.
2. Measure the resistance of the (R283) Passenger Occupant Detector Signal circuit to the (R284) Passenger Occupant Detector Sensor Return circuit at the appropriate terminals of the SRS Load Tool Adapter.

Is the resistance below 700 Ohms?

Yes

- 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.

- Turn the ignition Off and wait 15 seconds before turning the ignition On.
- Wait one minute and read active codes.
- If the B1CDC-Passenger Occupant Detector circuit High DTC or B1CDD-PASSENGER OCCUPANT DETECTOR CIRCUIT OPEN DTC becomes active, replace the ORC. Occupant Restraint Controller - Removal.

No

- Go To 8

8. 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.

1. Replace the Passenger Occupant Detector Sensor. Occupant Detection Sensor - Removal.
2. Remove any special tools or jumper wires and reconnect all previously 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.

3. Connect the scan tool to the Data Link Connector - use the most current software available.
4. Use the scan tool and erase the ORC stored codes.
5. Turn the Ignition Off and wait 15 seconds before turning the Ignition On.
6. Wait one minute and read active codes and if there are none present read the stored codes.

Does the scan tool display active B1CDC-PASSENGER OCCUPANT DETECTOR CIRCUIT HIGH or B1CDD-PASSENGER OCCUPANT DETECTOR CIRCUIT OPEN 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. Occupant Restraint Controller - Removal.
- Perform the AIRBAG SYSTEM VERIFICATION TEST. Airbag System Verification Test.

No

- Repair is complete.
- Perform the AIRBAG SYSTEM VERIFICATION TEST. Airbag System Verification Test.

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