LS 400 V8-4.0L (1UZ-FE) (1990)
Power Mirror Control Module: Testing and Inspection
INSPECTION OF MIRROR ECU
1. INSPECT MIRROR ECU CIRCUIT
Disconnect the connectors from the ECU and inspect the connector on the wire harness side as shown in the chart below.
2. INSPECT MIRROR ECU OPERATION
Connect the connectors and using a voltmeter with high impedance (10 k Ohms per volt minimum), measure the voltage at each terminal and body
ground.