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.
Power Windows do not Operate at All: Procedure
- INSPECT FUSE (AM1, GAUGE, FL DOOR)
- Remove the AM1, GAUGE, FL DOOR fuses from the instrument panel junction block.
- Measure the resistance of the fuses.
Standard resistance
Below 1 Ω
NG → REPLACE FUSE
OK: Go to next step
- INSPECT IGNITION RELAY NO. 1 (Marking: IG1)
- Remove the IG1 relay from the instrument panel junction block.
- Measure the resistance of the relay.
Standard resistance
Tester Connection Specified Condition 3 - 5 10 kΩ or higher 3 - 5 Below 1 Ω
(when battery voltage is applied to terminals 1 and 2)
NG → REPLACE IGNITION RELAY NO. 1
OK: Go to next step
- CHECK WIRE HARNESS (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY - BATTERY AND BODY GROUND)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the P9 master switch connector.
- Measure the voltage and resistance of the wire harness side connector.
Standard voltage
Tester Connection Condition Specified Condition P9-10 (B) - Body ground Always 11 to 14 V P9-20 (IG) - Body ground Ignition switch OFF Below 1 V P9-20 (IG) - Body ground Ignition switch ON 11 to 14 V Standard resistance
Tester Connection Specified Condition P9-2 (GND) - Body ground Below 1 kΩ
NG → REPAIR OR REPLACE HARNESS AND CONNECTOR
OK → REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY
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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.
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