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 MANUALSLEXUS1997ES 300 V6-3.0L (1MZ-FE)REPAIR AND DIAGNOSISWINDOWS AND GLASSWINDOWSPOWER WINDOW SWITCHTESTING AND INSPECTIONWINDOW CONTROL SWITCH
1997 Lexus ES 300 V6-3.0L (1MZ-FE)
Window Control Switch
1997 Lexus ES 300 V6-3.0L (1MZ-FE)SECTION Window Control Switch
LOCATION
INSPECTION
1. INSPECT POWER WINDOW MASTER SWITCH CONTINUITY
2. INSPECT ONE TOUCH POWER WINDOW SYSTEM CURRENT OF CIRCUIT
Using An Ammeter:
a. Disconnect the connector from the master switch.
b. Connect the positive (+) lead from the ammeter to terminal 6 on the wire harness side connector and the negative (-) lead to negative (-) terminal of the battery.
c. Connect the positive (+) lead from the battery to terminal 13 on the wire harness side connector.
d. As the window goes down, check that the current flow is approximately 7 A.
e. Check that the current increases up to approximately 14.5 A or more when the window stops going down.
HINT: The circuit breaker opens some 4-40 seconds after the window stops going down, so that check must be made before the circuit breaker operates.
If the operation is as specified, replace the master switch.
Using An Ammeter With a Current-measuring Probe:
a. Remove the master switch with connector connected.
b. Attach a current-measuring probe to terminal 7 of the wire harness.
c. Turn the ignition switch ON and set the power window switch in the down position.
d. As the window goes down, check that the current flow is approximately 7 A.
e. Check that the current increases up to approximately 14.5 A or more when the window stops going down.
HINT: The circuit breaker opens some 4-40 seconds after the window stops going down, so that check must be made before the circuit breaker operates.
If operation is as specified, replace the master switch.
3. INSPECT POWER WINDOW MASTER SWITCH CIRCUIT
Disconnect the connector from the master switch and inspect the connector on the wire harness side, as shown.
If the circuit is not as specified, inspect the circuits connected to other parts.
5. INSPECT POWER WINDOW SWITCH CONTINUITY
If continuity is not as specified, replace the switch.
6. INSPECT POWER WINDOW SWITCH CIRCUIT
Disconnect the connector from the switch and inspect the connector on the wire harness side, as shown.
If the circuit is not as specified, inspect the circuits connected to other parts.
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.