Power Source Circuit

Turn ignition switch off. Disconnect ECU connectors. Ensure battery voltage exists between and ECU 22-pin connector T4 terminal No. 11 (Red wire) and ECU connector T3 terminal No. 7 (White/Black wire). Ensure battery voltage exists between and ECU 12-pin connector T3 terminal No. 1 (Red wire) and ECU connector T3 terminal No. 7 (White/Black wire). If battery voltage is present, go to CIRCUIT GROUND. If battery voltage is not present, repair open in harness or connectors as necessary. Retest system operation.