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Home >> Chrysler >> 2011 >> 300 Base, Gas >> Repair and Diagnosis >> External Pages >> Different car >> Section 404 (Occupant Restraint Controller (Orc) - DTCS B212C-13 To U1415-00 - 2500HD & 3500HD) >> Diagnosis And Testing >> B2734-12-Passenger Occupant Detection Sensor-Short To Battery >> Diagnostic Test

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.
  1. VERIFY ACTIVE OR STORED 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 and shorted faults in both the (R283) signal and (R284) return circuits.

      Does the scan tool display active B2734-12-PASSENGER OCCUPANT DETECTION SENSOR-CIRCUIT TO BATTERY DTC?

      Yes 

      • Go To  2

      No 

  2. CHECK FOR ADDITIONAL ACTIVE SENSOR DTCS 
    1. With the scan tool, read all active ORC DTCs.

      Are DTCs B0052-2B-1ST ROW PASSENGER SEAT BELT SENSOR-WIRES SHORTED TOGETHER and B0052-13-PASSENGER SEATBELT SENSOR-CIRCUIT OPEN active?

      Yes 

      • Replace or repair the (R284) Passenger Detection Return circuit for a short to voltage in accordance with the Service Information.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  3
  3. 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 Occupant Detector Sensor (ODS) harness connector in the seat cushion connected.
    2. Keep the passenger under seat harness connector connected.
    3. Disconnect the ORC C1 and C2 harness connectors.
    4. Connect the SRS Load Tool Adapter to the ORC C1 and C2 connectors (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool)
    5. 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.

    6. 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.

    7. Measure the voltage of the (R283) Passenger Occupant Detector Signal circuit between the SRS Load Tool C1B-24 and ground (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool)

      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.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  4
  4. CHECK THE (R283) PASSENGER OCCUPANT DETECTOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE BETWEEN THE ORC AND THE PASSENGER UNDER SEAT 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.

    NOTE:

    Check connectors - Clean/Repair as necessary.

    1. Disconnect the passenger under seat harness connector.
    2. 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.

    3. 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.

    4. Measure the voltage between ground and the (R283) Passenger Occupant Detector Signal circuit between the SRS Load Tool cavity C1B-24 and ground (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 under seat 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  5
  5. CHECK THE (R283) PASSENGER OCCUPANT DETECTOR SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE IN THE PASSENGER UNDER SEAT 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 under seat jumper harness connector.
      NOTE:

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

    2. Access the Passenger Occupant Detector Sensor (ODS) connector located at the passenger seat cushion.
    3. Disconnect the Passenger Occupant Detector Sensor (ODS) harness connector.
    4. 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.

    5. 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.

    6. Measure the voltage between ground and the (R283) Occupant Detector Signal Circuit between the SRS Load Tool cavity C1B-24 and ground (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool)

      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 seat assembly 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  6
  6. CHECK THE (R283) PASSENGER OCCUPANT DETECTOR SENSOR SIGNAL CIRCUIT AND (R284) PASSENGER SEAT DETECTION RETURN CIRCUIT FOR AN OPEN OR HIGH RESISTANCE BETWEEN THE ORC AND THE PASSENGER UNDER SEAT INLINE 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 under seat inline harness connector.
    2. Measure the resistance of the (R284) Passenger Seat Detection Return circuit from the appropriate terminal of the passenger under seat connector to the SRS Load Tool cavity C1B-19.
    3. Measure the resistance of the (R283) Occupant Detector Sensor Signal circuit from the appropriate terminal of the passenger under seat inline harness connector to the SRS Load Tool cavity C1B-24 (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool)

      Is the resistance for either circuit below 1.0 Ohm?

      Yes 

      • Go To  7

      No 

      • Repair the (R283) Occupant Detector Sensor Signal circuit or (R284) Passenger Seat Detection Return circuit for an open or high resistance.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  7. CHECK THE (R283) PASSENGER OCCUPANT DETECTOR SENSOR SIGNAL CIRCUIT AND (R284) PASSENGER SEAT DETECTION 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 passenger under seat harness connector.
      NOTE:

      Inspect terminal pins and verify the passenger under seat inline 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 (R284) Passenger Seat Detection Return circuit between the ODS sensor cavity 2 and the SRS Load Tool cavity C1B-19.
    5. Measure the resistance of the (R283) Passenger Occupant Sensor Signal circuit between the ODS sensor cavity 1 and the SRS Load Tool cavity C1B-24 (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool).

      Is the resistance for either circuit below 1.0 Ohm?

      Yes 

      • Go To  8

      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 (R284) Passenger Seat Detection Return circuit in the body harness for an open or high resistance.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  8. CHECK THE (R283) PASSENGER OCCUPANT DETECTOR SENSOR SIGNAL CIRCUIT AND (R284) PASSENGER SEAT DETECTION 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 Seat Detection Return circuit between the SRS Load Tool cavity C1B-24 and C1B-19 (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.

      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.
      • If the vehicle is equipped with the keyless ignition, follow this ignition on warning.
      • 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 DTC becomes active, 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 

      • Go To  9
  9. 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 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.

    4. 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.

    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.

      No 

      • Repair is complete.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
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