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Test 123A - Body Control Module No Response

CAUTION: Always turn ignition off prior to disconnecting or connecting any module connector.
NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS - 3.0L article in ENGINE PERFORMANCE. Perform TEST VER-1 after each repair.
  1. Turn ignition off. Disconnect Body Control Module (BCM) Black connector. BCM is located behind right side kick panel. Check connector condition and clean or repair connector as necessary. Turn ignition on. Using scan tool in voltmeter mode, check voltage on BCM Black connector terminal No. 6 (Dark Blue/White wire). If voltage is less than 10 volts, go to step 6). If voltage is more than 10 volts, go to next step.
  2. Check voltage on BCM Black connector terminal No. 8 (Pink wire). If voltage is less than 10 volts, repair open Pink wire. If voltage is more than 10 volts, go to next step.
  3. Turn ignition off. Using scan tool in ohmmeter mode, check resistance of BCM Black connector terminal No. 19 (Blue/Light Green wire). If resistance is more than 15 ohms, repair open Blue/Light Green wire. If resistance is less than 15 ohms, go to next step.
  4. Using an external ohmmeter, with scan tool connected to Data Link Connector (DLC), check resistance of Violet/Brown wire between BCM Black connector terminal No. 7 and DLC terminal No. 4. If resistance is more than 5 ohms, repair open Violet/Brown wire. If resistance is less than 5 ohms, go to next step.
  5. Check resistance of White/Black wire between BCM Black connector terminal No. 20 and DLC connector terminal No. 3. If resistance is more than 5 ohms, repair open White/Black wire. If resistance is less than 5 ohms, replace BCM.
  6. Remove and inspect fuse No. 14. See Figure. If fuse is open, go to step 8). If fuse is okay, reinstall fuse and go to next step.
  7. Ensure ignition is on. Using scan tool in voltmeter mode, check voltage on fuse No. 14 (Dark Blue wire). If voltage is more than 10 volts, repair open Dark Blue wire between fuse panel and BCM. If voltage is less than 10 volts, repair open Dark Blue wire between fuse panel and ignition switch.
  8. Turn ignition off. Using scan tool in ohmmeter mode, check resistance of fuse No. 14 (Dark Blue/White wire). If resistance is less than 5 ohms, repair Dark Blue/White wire for short to ground and replace fuse No. 14. If resistance is more than 5 ohms, go to next step.
  9. Reconnect BCM Black connector. Check resistance of fuse No. 14 (Dark Blue/White wire). If resistance is less than 5 ohms, replace BCM and replace fuse No. 14. If resistance is more than 5 ohms, replace fuse No. 14.
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