Power Mirror Control Module: Testing and Inspection

INSPECT MIRROR CONTROL ECU CIRCUIT
Disconnect the connector from the ECU and inspect the connector on the wire harness side.







If the circuit is not as specified, inspect the circuits connected to other parts.

INSPECT MIRROR CONTROL ECU OPERATION
Connect the connectors and using a voltmeter with high impedance (10 kohm/V minimum), measure the voltage at each terminal and body ground.
If the operation is not as specified, inspect the wire harness and mirror switch or motor assembly. Then if these are correct, replace the ECU.