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Diagnostic Test

  1. 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.

      Does the scan tool display active B1C18-PASSENGER ACTIVE HEADREST CONTROL CIRCUIT LOW DTC?

      Yes 

      • Go To  2

      No 

  2. CHECK FOR A SHORTED ACTIVE HEAD REST SIGNAL CIRCUIT IN PASSENGER ACTIVE HEAD REST 
    Fig 1: Active Head Rest Load Tool
    GC0138204Courtesy of CHRYSLER GROUP, LLC
    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. Access the Passenger Active Head Rest harness connector located in the passenger seatback jumper harness.
    2. Disconnect the Passenger Active Headrest harness connectors.
      NOTE:

      Check the connectors - Clean and repair as necessary.

      NOTE:

      Please use the Active Head Rest Load Tool (special tool #10253, Tester, AHR Load) in testing the present status of the AHR signal circuit.

    3. Connect the AHR Load Tool (special tool #10253, Tester, AHR Load) to the passenger AHR seatback jumper harness connector going into the seatback and under the seat. Not into the passenger AHR component harness.
      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. With the scan tool, read the active ORC DTCs.

      Does the scan tool display: B1C18-PASSENGER ACTIVE HEADREST CONTROL CIRCUIT LOW?

      Yes 

      • Go To  3

      No 

      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 Active Head Rest in accordance with the Service Information. Refer to HEADREST, REMOVAL .
  3. CHECK THE (R677) ACTIVE HEAD RESTRAINT 1ST ROW PASSENGER SIGNAL CIRCUIT HARNESS FOR A SHORT TO GROUND 
    NOTE:

    The AHR connectors carry a shorting bar that should set a high code upon disconnecting the AHR harness connectors.

    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. Access the Passenger Active Headrest harness connector located in the passenger seat back.
    2. Disconnect the Passenger Active Headrest 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.

      Does the scan tool display active B1C19-PASSENGER ACTIVE HEADREST CONTROL CIRCUIT HIGH?

      Yes 

      • Turn the Ignition off.
        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.

      • Connect the Passenger Active Headrest 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.

      • Wait 15 seconds before turning the Ignition On.
      • Use the scan tool and erase the ORC stored codes.
        NOTE:

        This forces the ORC module into a reset diagnostic mode to check for Active ORC DTCs.

      • Turn the ignition Off. Wait 15 seconds before turning the ignition On.
      • Wait one minute and read active codes.
      • If the B1C18-Passenger Active Headrest Control Circuit Low DTC becomes active, replace the Passenger Active Headrest in accordance with the Service Information. Refer to HEADREST, REMOVAL .

      No 

      • Go To  4
  4. CHECK THE (Z908) ACTIVE HEAD RESTRAINT 1ST ROW PASSENGER GROUND CIRCUIT FOR OPEN 
    Fig 2: Checking Active Head Restraint 1st Row Passenger Ground Circuit For Open
    GC0138209Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance of the Ground circuit between the Passenger Head Restraint connector and ground.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  5

      No 

      • Repair the Ground circuit for a open or high resistance.
      • Perform the AIRBAG SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  5. CHECK THE (R677) ACTIVE HEAD RESTRAINT 1ST ROW PASSENGER SIGNAL CIRCUIT HARNESS FOR SHORT TO GROUND IN THE BODY HARNESS 
    Fig 3: Checking Active Head Restraint 1st Row Signal Circuit For Short To Ground
    GC0138210Courtesy of CHRYSLER GROUP, LLC
    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 Active Headrest harness connector located in the passenger seatback.
    2. Disconnect the ORC Module harness connector.
    3. Connect the SRS Load Tool Adapter (special tool #8443-25, 56 Way ACM Adapter).
    4. Disconnect the in-line underseat jumper harness connector located under the passenger seat to the rear of the seat cushion.
    5. Measure the resistance between ground and the (R677) Active Head Restraint 1st Row Passenger Signal circuit of the appropriate terminal of the SRS Load Tool Adapter (special tool #8443-25, 56 Way ACM Adapter).

      Is the resistance below 5.0 Ohms?

      Yes 

      • Repair the short to ground in the (R677) Active Head Restraint 1st Row Passenger Signal circuit located between the inline underseat jumper harness connector and the ORC.
      • Perform the AIRBAG SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  6
  6. CHECK THE (R677) ACTIVE HEAD RESTRAINT 1ST ROW PASSENGER SIGNAL CIRCUIT FOR A SHORT TO GROUND IN THE PASSENGER ACTIVE HEAD REST SEAT BACK JUMPER HARNESS 
    Fig 4: Checking Active Head Restraint 1st Row Signal Circuit For Short To Ground
    GC0138210Courtesy of CHRYSLER GROUP, LLC
    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:

    Inspect for damaged or bent terminals at the inline underseat jumper harness connectors located under the passenger seat to the passenger active head rest.

    1. Reconnect the inline underseat jumper harness connector located under the passenger seat to the rear of the seat cushion.
    2. Measure the resistance of the (R677) Active Head Restraint 1st Row Passenger Signal circuit between the appropriate terminal of the SRS Load Tool Adapter (special tool #8443-25, 56 Way ACM Adapter) and ground.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Repair the short to ground in the (R677) Active Head Restraint 1st Row Passenger Signal circuit located between the Passenger Active Head Rest jumper harness connector and the inline connector under the passenger seat.
      • Perform the AIRBAG SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  7
  7. CHECK THE OPERATION OF THE PASSENGER ACTIVE HEAD REST 
    1. Replace the Passenger Active Head Restraint in accordance with the Service Information.
    2. Reconnect the vehicle body harness to the Passenger Active Head Restraint harness connector.
    3. 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.

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

      Does the scan tool display active B1C18-PASSENGER ACTIVE HEADREST CONTROL CIRCUIT LOW 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 Service Information.
      • Perform the AIRBAG SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

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