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Circuit Test S - Code 52, Back-Up Power Supply Fault

NOTE: Before proceeding, follow air bag service precautions. See SERVICE PRECAUTIONS  . After repairs are performed, recheck AIR BAG warning light for other fault codes. Perform system operation check. See TESTING - SYSTEM OPERATION CHECK  .
  1. INITIAL TEST PROCEDURE  - Deactivate SRS. See COMPLETE SYSTEM DEACTIVATION  under DISABLING & ACTIVATING AIR BAG SYSTEM. Disconnect diagnostic monitor. See Figure . Check resistance between terminal No. 15 (White/Orange wire) of diagnostic monitor Gray connector and ground. See Figure . If resistance is less than 1000 ohms, go to step 2). If resistance is more than 1000 ohms, replace diagnostic monitor. When repairs are complete, perform TESTING - SYSTEM OPERATION CHECK  with Air Bag Simulator(s) (105-00008) still in place of air bag module(s). If system checks okay, reactivate SRS.
  2. Check For Short To Ground In Circuit No. 611 (White/Orange Wire)  - Disconnect rear safing impact sensor. See Figure . Check resistance between terminal No. 15 (White/Orange wire) of diagnostic monitor Gray connector and ground. If resistance is more than 1000 ohms, go to step 3). If resistance is less than 1000 ohms, locate and repair short to ground in circuit No. 611 (White/Orange wire). Reconnect all disconnected SRS connectors. When repairs are complete, check AIR BAG warning light for codes with Air Bag Simulator(s) (105-00008) still in place of air bag module(s). See TESTING - SYSTEM OPERATION CHECK  . If system checks okay, reactivate SRS.
  3. CHECK FOR SHORT TO GROUND IN CIRCUIT NO. 612 (PURPLE/ORANGE WIRE)  - Check resistance between terminal No. 23 (Purple/Orange wire) of diagnostic monitor Black connector and ground. If resistance is less than 1000 ohms, locate and repair short to ground in circuit No. 612 (Purple/Orange wire). Reconnect all disconnected SRS connectors. When repairs are complete, check AIR BAG warning light for codes with Air Bag Simulator(s) (105-00008) still in place of air bag module(s). See TESTING - SYSTEM OPERATION CHECK  . If system checks okay, reactivate SRS. If resistance is more than 1000 ohms, replace rear safing impact sensor. Reconnect all disconnected SRS connectors. When repairs are complete, check AIR BAG warning light for codes with Air Bag Simulator(s) (105-00008) still in place of air bag module(s). See TESTING - SYSTEM OPERATION CHECK  . If system checks okay, reactivate SRS.
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