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 Master Switch: Inspection
- INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY
- Measure the resistance of the master switch.
Standard resistance: Driver's switch (Window unlock and lock)
TESTER CONNECTION SPECIFIED CONDITIONSwitch Condition Tester Connection Specified Condition UP DU (4) - B (6) - B (7) Below 1 Ω E (1) - E (3) - DD (9) OFF E (1) - E (3) - DU (4) Below 1 Ω E (1) - E (3) - DD (9) DOWN E (1) - E (3) - DU (4) Below 1 Ω B (6) - B (7) - DD (9) DOWN AUTO E (1) - E (3) - DU (4) Below 1 Ω B (6) - B (7) - DD (9) Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Front passenger's switch (Window unlock)
TESTER CONNECTION SPECIFIED CONDITIONSwitch Condition Tester Connection Specified Condition UP E (1) - E (3) - PD (15) Below 1 Ω B (6) - B (7) - PU (18) OFF E (1) - E (3) - PD (15) Below 1 Ω E (1) - E (3) - PU (18) DOWN E (1) - E (3) - PU (18) Below 1 Ω B (6) - B (7) - PD (15) Front passenger's switch (Window lock)
TESTER CONNECTION SPECIFIED CONDITIONSwitch Condition Tester Connection Specified Condition UP B (6) - B (7) - PU (18) Below 1 Ω OFF PD (15) - PU (18) Below 1 Ω DOWN B (6) - B (7) - PD (15) Below 1 Ω Rear left switch (Window unlock)
TESTER CONNECTION SPECIFIED CONDITIONSwitch Condition Tester Connection Specified Condition UP E (1) - E (3) - RLD (13) Below 1 Ω B (6) - B (7) - RLU (12) OFF E (1) - E (3) - RLD (13) Below 1 Ω E (1) - E (3) - RLU (12) DOWN E (1) - E (3) - RLU (12) Below 1 Ω B (6) - B (7) - RLD (13) Rear left switch (Window lock)
TESTER CONNECTION SPECIFIED CONDITIONSwitch Condition Tester Connection Specified Condition UP B (6) - B (7) - RLU (12) Below 1 Ω OFF RLU (12) - RLD (13) Below 1 Ω DOWN B (6) - B (7) - RLD (13) Below 1 Ω Rear right switch (Window unlock)
TESTER CONNECTION SPECIFIED CONDITIONSwitch Condition Tester Connection Specified Condition UP B (6) - B (7) - RRU (10) Below 1 Ω E (1) - E (3) - RRD (16) OFF E (1) - E (3) - RRU (10) Below 1 Ω E (1) - E (3) - RRD (16) DOWN E (1) - E (3) - RRU (10) Below 1 Ω B (6) - B (7) - RRD (16) Rear right switch (Window lock)
TESTER CONNECTION SPECIFIED CONDITIONSwitch Condition Tester Connection Specified Condition UP B (6) - B (7) - RRU (10) Below 1 Ω OFF RRU (10) - RRD (16) Below 1 Ω DOWN B (6) - B (7) - RRD (16) Below 1 Ω If the result is not as specified, replace the master switch.
- Inspect the master switch illumination.
Standard:
MEASURING SPECIFIED CONDITIONMeasurement Condition Specified Condition Battery positive (+) → Terminal 6
Battery negative (-) → Terminal 3Switch illumination lights up If the result is not as specified, replace the master switch.
- Measure the resistance of the master switch.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.