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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 SHORTED SQUIB CIRCUITS IN DRIVER AIRBAG 
    Fig 1: Checking Driver Airbag Squib Circuits
    GC0016494Courtesy 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 Airbag Squib connectors.

    WARNING: To avoid serious or fatal injury, 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 and appropriate Jumper to the Driver Airbag Squib connectors.

    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: B1B00-DRIVER AIRBAG SQUIB 1 CIRCUIT LOW? 

    Yes 

    1. Go to  3).

    No 

    1. Replace the Driver Airbag in accordance with the Service Information.
    2. Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1 .
  3. 3) CHECK STEERING CONTROL MODULE C4 SQUIB CIRCUITS FOR A SHORT TO GROUND 
    Fig 2: Checking Steering Control Module C4 Squib Circuits
    GC0043713Courtesy 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 Jumper from the Driver Airbag Squib connectors.

    Disconnect the Steering Control Module C4 connector.

    NOTE: Check connectors - Clean and repair as necessary.

    Connect the 8443 Load Tool and appropriate Jumper to the Steering Control Module C4 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: B1B00-DRIVER AIRBAG SQUIB 1 CIRCUIT LOW? 

    Yes 

    1. Go to  4).

    No 

    1. Replace the Steering Column Control Module in accordance with the Service Information.
    2. Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1 .
  4. 4) CHECK (R43) DRIVER SQUIB 1 LINE 2 CIRCUIT AND (R45) DRIVER SQUIB 1 LINE 1 CIRCUIT FOR A SHORT TO GROUND 
    Fig 3: Checking Driver Squib 1 Line 2 Circuit & Driver Squib 1 Line 1 Circuit For Short To Ground
    GC0027631Courtesy 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 and Jumper from the Steering Control Module C2 connector.

    Disconnect the ORC connectors.

    NOTE: Check connectors - Clean and repair as necessary.

    Connect the 8443-24 Load Tool ORC Adapter to the ORC C2 connector.

    Measure the resistance of the (R43) Driver Squib 1 Line 2 circuit between ground and the adapter.

    Measure the resistance of the (R45) Driver Squib 1 Line 1 circuit between ground and the adapter.

    Is the resistance below 10k ohms for either measurement? 

    Yes 

    1. Repair the Driver Squib 1 circuits with resistance below 10k ohms for a short to ground.
    2. Perform *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 serious or fatal injury.
    WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
    1. Replace the ORC in accordance with Service Information.
    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.

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

    WARNING: To avoid serious or fatal injury, 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 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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