Diagnostic Test

WARNING: This page is about a different car, the 2009 Jeep Patriot and 2009 Jeep Compass. However, it is still accessible from the selected car via links, so may be relevant.

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.
1. Turn the ignition on.
  Select ACTIVE or STORED DTC:
  
  ACTIVE DTC
  - Go to step 2
  STORED DTC
  - Go to step 4
CHECK FOR SHORTED SQUIB CIRCUITS IN LEFT SIDE CURTAIN AIRBAG

Fig 1: Checking Squib Circuits In Left Side Curtain Airbag
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 Left Side Curtain Airbag connector.
  WARNING: Do not place an intact undeployed curtain airbag face down on a hard surface, the airbag will propel into the air if accidentally deployed. Failure to follow these instructions may result in possible serious or fatal injury.
  
  NOTE: Check connectors - Clean and repair as necessary.
2. Connect the 8443 Load Tool and 8443-8 Jumper to the Left Side Curtain 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: B1B18-LEFT SIDE CURTAIN SQUIB 1 CIRCUIT LOW?
  
  Yes
  - Go to step 3
  No
  - Replace the Left Side Curtain Airbag in accordance with the Service Information.
  - Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1. See DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure
CHECK (R3) LEFT CURTAIN SQUIB 1 LINE 1 CIRCUIT AND (R1) LEFT CURTAIN SQUIB 1 LINE 2 CIRCUIT FOR A SHORT TO GROUND

Fig 2: Checking Left Curtain Squib 1 Line 1 Circuit & Left Curtain Squib 1 Line 2 Circuit
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 8443 Load Tool and Jumper from the Left Side Curtain Airbag connector.
2. Disconnect the ORC connectors.
  NOTE: Check connectors - Clean and repair as necessary.
3. Connect the ORC 8443-25 Adaptor to the ORC connectors.
4. Measure the resistance of the (R3) Left Curtain Squib 1 Line 1 circuit between the ORC 8443-25 Adaptor cavity 6 and ground.
5. Measure the resistance of the (R1) Left Curtain Squib 1 Line 2 circuit between the ORC 8443-25 Adaptor cavity 5 and ground.
  Is the resistance below 10k ohms on either circuit?
  
  Yes
  - Repair the Left Curtain Squib 1 circuits with resistance below 10k ohms for a short to ground.
  - Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1. See DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure
  No
  - Replace the ORC in accordance with Service Information.
  - Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1. 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 Diagnose and repair all active codes before diagnosing stored codes. Refer to DIAGNOSTIC CODE INDEX (GAS) or COMMUNICATION - NON-DTC DIAGNOSTICS for a complete list of airbag system diagnostic procedures for a complete list of airbag system diagnostic procedures.
1. With the scan tool, record and erase all Airbag System Module DTCs.
  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.
2. 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.
3. 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.
4. 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.
5. 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 (GAS) .
  No
  - No problem found at this time. Erase all codes before returning the vehicle to the customer.