Power and Ground Distribution: Description and Operation

ECU Power-Supply And Ground Circuit:

The battery supplies a stabilized 5V power supply to the ECU, via the constant-voltage circuit and terminal 70 (which is directly connected to the battery).

ECU terminal voltage (Connection condition of the ECU connector).

ECU Power-Supply And Ground Circuit:

ECU Power-Supply And Ground Circuit:

Checking the ground circuit (Disconnect the connector and check at the wiring harness.)