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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, ensure no continuity exists between CC ECU connector terminal No. 15/BATT (Red/Green wire) and ECU-B fuse. If continuity is not present, go to next step. If continuity is present, repair short in harness circuit between CC ECU connector terminal No. 15 and ECU-B fuse.
  2. Remove CC ECU with connector connected. Using voltmeter positive lead, backprobe CC ECU connector terminal No. 15/BATT (Red/Green wire). Turn ignition off and 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. If voltage is not as specified, repair harness or connector between CC ECU connector terminal No. 14 and battery.
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