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 MANUALSLEXUS2009ES 350 V6-3.5L (2GR-FE)REPAIR AND DIAGNOSISWINDOWS AND GLASSWINDOWSTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSECU POWER SOURCE CIRCUIT
2009 Lexus ES 350 V6-3.5L (2GR-FE)
ECU Power Source Circuit
2009 Lexus ES 350 V6-3.5L (2GR-FE)SECTION ECU Power Source Circuit
WINDSHIELD / WINDOWGLASS: POWER WINDOW CONTROL SYSTEM: ECU Power Source Circuit
ECU Power Source Circuit
DESCRIPTION
This circuit supplies to operate the power window ECU (Driver side, Front passenger side, Rear LH and Rear RH).
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. CHECK WIRE HARNESS (POWER WINDOW ECU - BATTERY AND BODY GROUND)
(a) Disconnect the power window ECU connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard voltage:
Standard resistance:
NG -- REPAIR OR REPLACE FUSE, HARNESS OR CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
RENDER: 1.0x
NO RELATED
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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.