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Test 14, Cc Ecu Back-Up Power Source

  1. Locate ECU-B fuse in junction block No. 1. See Figure. Remove ECU-B fuse and ensure fuse continuity. If fuse is okay, go to next step. If fuse is not okay, check for short between CC ECU connector terminal No. 15/BATT (Red/Green wire) and ECU-B fuse. Check for short in Red/White wire between CC ECU, stoplight switch and STOP fuse.
  2. Remove CC ECU with connector connected. Using voltmeter positive lead, backprobe CC ECU connector terminal No. 15/BATT (Red/Green wire). Ensure battery voltage exists between CC ECU connector terminal No. 15 and ground. If voltage is as specified, go to test for next trouble code displayed or appropriate TROUBLE SHOOTING BY SYMPTOM . If voltage is not as specified, repair harness or connector between CC ECU and battery.
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