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 Window Control System - Diagnostics: Inspection
- INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSY
- Measure the resistance of the switch when the switch is operated.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard:
Driver switch
POWER WINDOW REGULATOR MASTER SWITCH ASSY (DRIVER SWITCH)Switch Condition Tester Connection Specified Condition AUTO UP 6 (PW) - 20 (DUP) Below 1 ohms 6 (PW) - 20 (DUP) UP 6 (PW) - 20 (DUP) Below 1 ohms OFF - - DOWN 6 (PW) - 11 (DDN) Below 1 ohms AUTO DOWN 6 (PW) - 11 (DDN) Below 1 ohms 6 (PW) - 16 (AUTO) Passenger switch
POWER WINDOW REGULATOR MASTER SWITCH ASSY (PASSENGER SWITCH)Switch Condition Tester Connection Specified Condition AUTO UP 3 (DT1) - 14 (SC2) Below 1 ohms 3 (DT1) - 15 (SC3) UP 3 (DT1) - 14 (SC2) Below 1 ohms OFF - - DOWN 3 (DT1) - 13 (SC1) Below 1 ohms AUTO DOWN 3 (DT1) - 13 (SC1) Below 1 ohms 3 (DT1) - 15 (SC3) If the result is not as specified, replace the master switch assy.
- Check the window lock switch.
Standard:
WINDOW LOCK SWITCHWindow Lock Switch Condition Tester Condition Specified Condition UNLOCK 7 (W/L) - 6 (PW) Below 1 ohms LOCK 7 (W/L) - 6 (PW) 10 k ohms or higher If the result is not as specified, replace the master switch assy.
- Check the door control switch.
Standard:
DOOR CONTROL SWITCHDoor Control Switch Condition Tester Condition Specified Condition UNLOCK 10 (E) - 18 (MUL) Below 1 ohms LOCK 8 (ML) - 10 (E) Below 1 ohms OFF - - If the result is not as specified, replace the master switch assy.
- Measure the resistance of the switch when the switch is operated.
- INSPECT POWER WINDOW REGULATOR SWITCH ASSY
- Measure the resistance of the switch when the switch is operated.
Standard:
POWER WINDOW REGULATOR SWITCH ASSYSwitch Condition Tester Connection Specified Condition AUTO UP 3 (A) - 8 (PCT) Below 1 ohms AUTO UP 1 (U) - 8 (PCT) Below 1 ohms UP 1 (U) - 8 (PCT) Below 1 ohms OFF - - DOWN 6 (D) - 8 (PCT) Below 1 ohms AUTO DOWN 3 (A) - 8 (PCT) Below 1 ohms AUTO DOWN 6 (D) - 8 (PCT) Below 1 ohms If the result is not as specified, replace the regulator switch assy.
- Measure the resistance of the switch when the switch is operated.
- INSPECT DOOR CONTROL SWITCH ASSY
- INSPECT POWER WINDOW REGULATOR MOTOR ASSY LH FRONT
- Inspect operation of the power window regulator motor (for driver side door).
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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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