Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSLEXUS2004LX 470 V8-4.7L (2UZ-FE)REPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - BODY AND FRAMEPOWER MIRROR CONTROL MODULETESTING AND INSPECTION
2004 Lexus LX 470 V8-4.7L (2UZ-FE)
Power Mirror Control Module: Testing and Inspection
2004 Lexus LX 470 V8-4.7L (2UZ-FE)SECTION 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 kohms/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.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.