Power Mirror Control Module: Testing and Inspection

INSPECT MIRROR ECU CIRCUIT

Wire Harness Side:
Disconnect the connectors from the ECU and inspect the connector on the wire harness side, as shown in the chart.

INSPECT MIRROR ECU OPERATION

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