Diagnostic Test

DETERMINE ACTIVE OR STORED DTC
NOTE: Ensure that the battery is fully charged.

NOTE: The scan tool, SRS Airbag Load Tool MRL 8443A, and DVOM are required to perform the following test.
1. Turn the ignition on.
  Select ACTIVE or STORED DTC:
  
  ACTIVE DTC
  - Go to step 2
  STORED DTC
  - Go to step 1
CHECK FOR OPEN DRIVER KNEE BOLSTER AIRBAG CIRCUITS

Fig 1: Checking For Shorted Driver Knee Bolster Airbag Circuits
Courtesy of CHRYSLER 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. Disconnect the Driver Knee Bolster Airbag connector.
  NOTE: Check connectors - Clean and repair as necessary.
2. Connect the 8443A Load Tool to the Driver Knee Bolster Airbag connector.
  WARNING: Turn the ignition on, then reconnect the 12-volt battery. Wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
3. With the scan tool, read the active ORC DTCs.
  Does the scan tool display: B1B12-DRIVER KNEE BOLSTER SQUIB CIRCUIT OPEN?
  
  Yes
  - Go to step 3
  No
  - Replace the Driver Knee Bolster Airbag in accordance with the Service Information.
  - Perform the AIRBAG SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure .
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
Courtesy of CHRYSLER 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. Disconnect the 8443A Load Tool from the Driver Knee Bolster Airbag connector.
2. Disconnect the ORC connectors.
  NOTE: Check connectors - Clean and repair as necessary.
3. Connect the 8443A Load Tool ORC Adaptor to the ORC C2 connector.
4. Measure the resistance of the (R11) Driver Knee Blocker Squib Line 1 circuit between the Driver knee Bolster Airbag connector and the 8443A ORC Adaptor.
  Is the resistance below 1.0 ohm?
  
  Yes
  - Go to step 4
  No
  - Repair the (R11) Driver Knee Blocker Squib Line 1 circuit for an open.
  - Perform the AIRBAG SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure .
CHECK (R9) DRIVER KNEE BLOCKER SQUIB LINE 2 CIRCUIT FOR AN OPEN

Fig 3: Checking Driver Knee Blocker Squib Line 2 Circuit For An Open
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (R9) Driver Knee Blocker Squib Line 2 circuit between the Driver knee Bolster Airbag connector and the 8443A ORC Adaptor.
  Is the resistance below 1.0 ohm?
  
  Yes
  - Replace the ORC in accordance with Service Information.
  - Perform the ORC VERIFICATION TEST. See DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure .
  No
  - Repair the (R9) Driver Knee Blocker Squib Line 2 circuit for an open.
  - Perform the AIRBAG SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure .

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
1. Using the SYSTEM WIRING DIAGRAMS 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.
2. Reconnect all disconnected components and harness connectors.
  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. With the scan tool, monitor for active codes while performing the following:
  WARNING: Maintain a safe distance from all airbags while performing the following steps. Failure to follow these instructions may result in possible serious or fatal injury.
  - 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.
4. 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
  - Select the appropriate diagnostic procedure from the DIAGNOSTIC CODE INDEX . See DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Diagnosis and Testing .
  No
  - No problem found at this time. Erase all codes before returning the vehicle to the customer.