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Diagnostic Test

WARNING: This page is about a different car, the 2006 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  4).
  2. 2)  CHECK FOR SHORTED DRIVER KNEE BOLSTER AIRBAG CIRCUITS 
    Fig 1: CHECKING DRIVER KNEE BOLSTER AIRBAG CIRCUITS
    GC0043727Courtesy of DAIMLERCHRYSLER CORP.
    WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

    Disconnect the Driver Knee Bolster Airbag connector.

    WARNING: To avoid personal injury or death, do not place an intact undeployed airbag face down on a hard surface, the airbag will propel into the air if accidentally deployed.
    NOTE: Check connectors - Clean and repair as necessary.

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

    WARNING: To avoid personal injury or death, turn the ignition on, then reconnect the battery.

    With the scan tool, read the active ORC DTCs.

    Does the scan tool display: B1B11-DRIVER KNEE BOLSTER SQUIB CIRCUIT HIGH? 

    Yes 

    1. Go To  3).

    No 

    1. Replace the Driver Knee Bolster Airbag in accordance with the Service Information.
    2. Perform the *AIRBAG SYSTEM VERIFICATION TEST - VER 1 .
  3. 3)  CHECK (R11) DRIVER KNEE BLOCKER SQUIB LINE 1 CIRCUIT OR (R94) DRIVER KNEE BLOCKER SQUIB LINE 2 CIRCUIT FOR A SHORT TO BATTERY 
    Fig 2: CHECKING DRIVER KNEE BLOCKER SQUIB CIRCUITS
    GC0043729Courtesy of DAIMLERCHRYSLER CORP.
    WARNING: To avoid personal injury or death, 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.

    WARNING: To avoid personal injury or death, turn the ignition on, then reconnect the battery.

    Measure the voltage of the (R11) Driver Knee Blocker Squib Line 1 circuit between the adaptor and ground.

    Measure the voltage of the (R9) Driver Knee Blocker Squib Line 2 circuit between the adaptor and ground.

    Is there any voltage present on either circuit? 

    Yes 

    1. Repair the (R11) Driver Knee Blocker Squib Line 1 circuits or (R9) Driver Knee Blocker Squib Line 2 with voltage present for short to battery.
    2. Perform the *AIRBAG SYSTEM VERIFICATION TEST - VER 1 .

    No 

    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 personal injury or death.
    WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
    1. Replace the ORC in accordance with Service Information.
    2. Perform the *AIRBAG SYSTEM VERIFICATION TEST - VER 1 .
  4. 4)  CHECKING STORED OR INTERMITTENT CODES 
    NOTE: Diagnose and repair all active codes before diagnosing stored codes. Refer to DIAGNOSTIC CODE INDEX  table.

    With the scan tool, record and erase all Airbag System Module DTCs.

    WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

    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 personal injury or death, 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  table.

    No 

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