Test 13, Cc Ecu Back-Up Power Source

Locate DOME fuse in engine compartment relay block No. 2. See Figure. Remove DOME 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 (Blue/Yellow wire) and DOME fuse.
Remove CC ECU with connector connected. Using voltmeter positive lead, backprobe CC ECU connector terminal No. 15/BATT (Blue/Yellow 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.