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Diagnostic Test

WARNING: This page is about a different car, the 2007 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
  1. 1) DETERMINE ACTIVE OR STORED DTC 
    NOTE: Ensure that the battery is fully charged.
    NOTE: The scan tool, SRS Airbag Load Tool MRL 8443 and DVOM are required to perform the following test.

    Turn the ignition on.

    Select ACTIVE or STORED DTC: 

    ACTIVE DTC 

    1. Go to  2).

    STORED DTC 

    1. Go to  5).
  2. 2) CHECK FOR OPEN DRIVER KNEE BOLSTER AIRBAG CIRCUITS  
    Fig 1: Checking Driver Knee Bolster Airbag Circuits
    GC0043727Courtesy of CHRYSLER LLC
    WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

    Disconnect the Driver Knee Bolster Airbag connector.

    NOTE: Check connectors - Clean and repair as necessary.

    Connect the 8443 Load Tool to the Driver Knee Bolster Airbag connector.

    WARNING: To avoid serious or fatal injury, turn the ignition on, then reconnect the battery.

    With the scan tool, read the active ORC DTCs.

    Does the scan tool display: B1B12-DRIVER KNEE BOLSTER SQUIB CIRCUIT OPEN? 

    Yes 

    1. Go to  3).

    No 

    1. Replace the Driver Knee Bolster Airbag in accordance with the Service Information.
    2. Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1 .
  3. 3) CHECK (R11) DRIVER KNEE BLOCKER SQUIB LINE 1 CIRCUIT FOR AN OPEN 
    Fig 2: Checking Driver Knee Blocker Squib Line 1 Circuit For An Open
    GC0043730Courtesy of CHRYSLER LLC
    WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

    Disconnect the 8443 Load Tool from the Driver Knee Bolster Airbag connector.

    Disconnect the ORC connectors.

    NOTE: Check connectors - Clean and repair as necessary.

    Connect the 8443 Load Tool ORC Adaptor to the ORC C2 connector.

    Measure the resistance of the (R11) Driver Knee Blocker Squib Line 1 circuit between the Driver knee Bolster Airbag connector and the 8443 ORC Adaptor.

    Is the resistance below 1.0 ohm? 

    Yes 

    1. Go to  4).

    No 

    1. Repair the (R11) Driver Knee Blocker Squib Line 1 circuit for an open.
    2. Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1 .
  4. 4) CHECK (R9) DRIVER KNEE BLOCKER SQUIB LINE 2 CIRCUIT FOR AN OPEN 
    Fig 3: Checking For An Open In Driver Knee Blocker Squib Line 2 Circuit
    GC0043731Courtesy of CHRYSLER LLC

    Measure the resistance of the (R9) Driver Knee Blocker Squib Line 2 circuit between the Driver knee Bolster Airbag connector and the 8443 ORC Adaptor.

    Is the resistance below 1.0 ohm? 

    Yes 

    WARNING: If the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Failure to take the proper precautions can result in accidental airbag deployment and serious or fatal injury.
    1. Replace the ORC in accordance with Service Information.
    2. Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1 .

    No 

    1. Repair the (R9) Driver Knee Blocker Squib Line 2 circuit for an open.
    2. Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1 .
  5. 5) CHECKING STORED OR INTERMITTENT CODES 
    NOTE: Diagnose and repair all active codes before diagnosing stored codes. Refer to the DIAGNOSTIC CODE INDEX for a complete list of airbag system diagnostic procedures.

    serious or fatal injury

    Using the wiring diagram/schematic as a guide, inspect the related wiring and connectors for chafed, pierced, pinched and partially broken wires and for broken, bent, pushed out, corroded and contaminated terminals. Repair as necessary.

    Reconnect all disconnected components and harness connectors.

    WARNING: To avoid serious or fatal injury, turn the ignition on, then reconnect the battery.

    With the scan tool, monitor for active codes while performing the following:

    • Wiggle the wiring harness and connectors of the related airbag circuit.
    • Continue the test until either a code becomes active or the problem area is isolated.

    In the previous steps you have attempted to recreate the conditions responsible for setting the DTC in question/causing the intermittent condition.

    Are any ACTIVE DTCs present? 

    Yes 

    1. Select the appropriate diagnostic procedure from the DIAGNOSTIC CODE INDEX .

    No 

    1. No problem found at this time. Erase all codes before returning the vehicle to the customer.
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