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.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.