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Home >> Jeep >> 2009 >> Commander Overland, 4WD >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Air Bag Restraint System - Electrical Diagnostics >> DTC Troubleshooting >> B1B20-Right Side Curtain Squib 1 Circuit Low >> Diagnostic Test

Diagnostic Test

  1. DETERMINE ACTIVE OR STORED DTC 
    NOTE: Make sure 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. Select Active or Stored DTC.

      Is the DTC active or stored?

      ORC - ACTIVE DTC 

      • Go to step  2

      ORC - STORED DTC 

  2. CHECK FOR SHORTED SQUIB CIRCUITS IN RIGHT SIDE CURTAIN AIRBAG 
    Fig 1: Checking For Shorted Squib Circuits In Right Side Curtain Airbag
    GC0119634Courtesy 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 Right Side Curtain Airbag connector.
      WARNING: Do not place an intact non-deployed 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 the connectors - Clean and repair as necessary.
    2. Connect the SRS Load Tool Kit 8443A and the SRS Load Tool Jumper 8443-8 to the Right Side Curtain Airbag connector.
      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, read the active ORC DTCs.

      Does the scan tool display: B1B20-RIGHT SIDE CURTAIN SQUIB 1 CIRCUIT LOW?

      Yes 

      • Go to step  3

      No 

  3. CHECK (R4) RIGHT CURTAIN SQUIB 1 LINE 1 CIRCUIT AND (R2) RIGHT CURTAIN SQUIB 1 LINE 2 CIRCUIT FOR A SHORT TO GROUND 
    Fig 2: Checking Right Curtain Squib 1 Line 1 Circuit & Right Curtain Squib 1 Line 2 Circuit For A Short To Ground
    GC0119635Courtesy 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 SRS Load Tool Kit 8443A and SRS Load Tool Jumper 8443-8 from the Right Side Curtain Airbag connector.
    2. Disconnect the ORC connectors.
      NOTE: Check connectors - Clean and repair as necessary.
    3. Connect the SRS Load Tool Adaptor 8443-24 to the ORC C1 connector.
    4. Measure the resistance of the (R4) Right Curtain Squib 1 Line 1 circuit between ground and the ORC adaptor.
    5. Measure the resistance of the (R2) Right Curtain Squib 1 Line 2 circuit between ground and the ORC adaptor.

      Is the resistance below 10K Ohms on either circuit?

      Yes 

      No