Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

VERIFY ACTIVE DTC
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.
1. VERIFY ACTIVE DTC
  NOTE:
  Make sure the battery is fully charged.
2. Turn the ignition on.
3. 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 ground circuits.
  
  Does the scan tool display active B2734-13-PASSENGER OCCUPANT DETECTION SENSOR - CIRCUIT OPEN - DTC?
  
  Yes
  - Go To 2
  No
  - Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. Refer to STANDARD PROCEDURE .
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.

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.
  NOTE:
  Check connectors - Clean and repair as necessary.
5. Connect the (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool) to the ORC harness connectors.
6. If equipped with the standard key ignition, use this ignition on warning.
7. If equipped with the keyless ignition, use 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.
8. Measure the voltage of the (R283) Passenger Occupant Detector Signal circuit between the (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool) connector C1B cavity 27 and connector C1A cavity 30 Z913 ground.
  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 in accordance with the Service Information.
  - Follow the WiTech Scan Tool Miscellaneous Function / Empty Seat Value Relearn and perform a Rezeroing of the OCM.
  - Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 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.
2. If equipped with the standard key ignition, use 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.
3. If equipped with the keyless ignition, use 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.
4. Measure the voltage between the common (Z913) Ground circuit at connector C1A cavity 30 and the (R283) Passenger Occupant Detector Signal circuit at connector C1B cavity 27 of the (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool).
  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 in accordance with the Service Information.
  - Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 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.
4. If equipped with the standard key ignition, use 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.
5. If equipped with the keyless ignition, use 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.
6. Measure the voltage between common (Z913) Ground circuit at connector C1A cavity 30 and the (R283) Passenger Occupant Detector Signal circuit at connector C1B cavity 27 of the (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool).
  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 passenger underseat connector and the Passenger Occupant Detector Sensor connector.
  - Replace the ODS Sensor in accordance with the Service Information.
  - Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 5
CHECK THE (R283) PASSENGER OCCUPANT DETECTOR SENSOR SIGNAL CIRCUIT AND (Z913) ORC COMMON GROUND 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 the inline underseat harness connector to the (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool) connector C1B cavity 27.
3. Measure the resistance of the (Z913) Ground circuit from the inline underseat harness connector to the (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool) connector C1A cavity 30.
  Is the resistance below 700 Ohms?
  
  Yes
  - Go To 6
  No
  - Repair the (R283) Occupant Detector Sensor Signal circuit or Ground circuit for an open or high resistance.
  - Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (R283) PASSENGER OCCUPANT DETECTOR SENSOR SIGNAL CIRCUIT AND (Z912) PASSENGER OCCUPANT DETECTOR GROUND 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 underseat harness connector.
  NOTE:
  Inspect terminal pins and verify the underseat harness 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 C1B connector (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool) cavity 27.
5. Measure the resistance of the Occupant Detector Sensor (Z913) Ground circuit from cavity 2 of the ODS connector to connector C1A cavity 30 of the (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool).
  Is the resistance below 700 Ohms?
  
  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.
  - Repair the (R283) Passenger Occupant Detector Signal circuit or Z913 Ground circuit in the body harness for an open or high resistance.
  - Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (R283) PASSENGER OCCUPANT DETECTOR SENSOR SIGNAL CIRCUIT AND PASSENGER OCCUPANT DETECTOR SENSOR GROUND 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 connector C1B cavity 27 to the (Z913) Ground circuit connector C1A cavity 30 (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool).
  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 B2734-13-PASSENGER OCCUPANT DETECTION SENSOR - CIRCUIT OPEN becomes active, replace the ORC in accordance with the Service Information. Refer to MODULE, OCCUPANT RESTRAINT CONTROLLER, REMOVAL .
  No
  - Go To 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 in accordance with the Service Information.
2. Remove any special tools or jumper wires and reconnect all previously disconnected components - except the Battery.
3. If equipped with the standard key ignition, use 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.
4. If equipped with the keyless ignition, use 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.
5. Connect the scan tool to the Data Link Connector - use the most current software available.
6. Use the scan tool and erase the ORC stored codes.
7. Turn the Ignition Off and wait 15 seconds before turning the Ignition On.
8. Wait one minute and read active codes and if there are none present read the stored codes.
  Does the scan tool display active B2734-13-PASSENGER OCCUPANT DETECTION SENSOR - 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 in accordance with the Service Information. Refer to MODULE, OCCUPANT RESTRAINT CONTROLLER, REMOVAL .
  - Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Repair is complete.
  - Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .