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 between each terminal of the connector when the switch is operated.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard resistance:
Driver switch
TESTER CONNECTION SPECIFIED CONDITIONWindow Lock Switch Condition Power Window Switch Condition Tester Connection Specified Condition Always (ON / OFF) UP 1 (E) - 9 (DD)
3 (E) - 9 (DD)
4 (DU) - 6 (B)
4 (DU) - 7 (B)Below 1 Ω Always (ON / OFF) OFF 1 (E) - 4 (DU)
3 (E) - 4 (DU)
1 (E) - 9 (DD)
3 (E) - 9 (DD)Below 1 Ω Always (ON / OFF) DOWN 1 (E) - 4 (DU)
3 (E) - 4 (DU)
6 (B) - 9 (DD)
7 (B) - 9 (DD)Below 1 Ω Always (ON / OFF) AUTO DOWN 1 (E) - 4 (DU)
3 (E) - 4 (DU)
6 (B) - 9 (DD)
7 (B) - 9 (DD)Below 1 Ω Front passenger switch
TESTER CONNECTION SPECIFIED CONDITIONWindow Lock Switch Condition Power Window Switch Condition Tester Connection Specified Condition OFF UP 1 (E) - 15 (PD)
3 (E) - 15 (PD)
6 (B) - 18 (PU)
7 (B) - 18 (PU)Below 1 Ω OFF OFF 1 (E) - 15 (PD)
3 (E) - 15 (PD)
1 (E) - 18 (PU)
3 (E) - 18 (PU)Below 1 Ω OFF DOWN 1 (E) - 18 (PU)
3 (E) - 18 (PU)
6 (B) - 15 (PD)
7 (B) - 15 (PD)Below 1 Ω ON UP 6 (B) - 18 (PU)
7 (B) - 18 (PU)Below 1 Ω ON OFF 15 (PD) - 18 (PU) Below 1 Ω ON DOWN 6 (B) - 15 (PD)
7 (B) - 15 (PD)Below 1 Ω Rear LH switch
TESTER CONNECTION SPECIFIED CONDITIONWindow Lock Switch Condition Power Window Switch Condition Tester Connection Specified Condition OFF UP 1 (E) - 13 (RLD)
3 (E) - 13 (RLD)
6 (B) - 12 (RLU)
7 (B) - 12 (RLU)Below 1 Ω OFF OFF 1 (E) - 12 (RLU)
3 (E) - 12 (RLU)
1 (E) - 13 (RLD)
3 (E) - 13 (RLD)Below 1 Ω OFF DOWN 1 (E) - 12 (RLU)
3 (E) - 12 (RLU)
6 (B) - 13 (RLD)
7 (B) - 13 (RLD)Below 1 Ω ON UP 6 (B) - 12 (RLU)
7 (B) - 12 (RLU)Below 1 Ω ON OFF 12 (RLU) - 13 (RLD) Below 1 Ω ON DOWN 6 (B) - 13 (RLD)
7 (B) - 13 (RLD)Below 1 Ω Rear RH switch
TESTER CONNECTION SPECIFIED CONDITIONWindow Lock Switch Condition Power Window Switch Condition Tester Connection Specified Condition OFF UP 1 (E) - 16 (RRD)
3 (E) - 16 (RRD)
6 (B) - 10 (RRU)
7 (B) - 10 (RRU)Below 1 Ω OFF OFF 1 (E) - 10 (RRU)
3 (E) - 10 (RRU)
1 (E) - 16 (RRD)
3 (E) - 16 (RRD)Below 1 Ω OFF DOWN 1 (E) - 10 (RRU)
3 (E) - 10 (RRU)
6 (B) - 16 (RRD)
7 (B) - 16 (RRD)Below 1 Ω ON UP 6 (B) - 10 (RRU)
7 (B) - 10 (RRU)Below 1 Ω ON OFF 10 (RRU) - 16 (RRD) Below 1 Ω ON DOWN 6 (B) - 16 (RRD)
7 (B) - 16 (RRD)Below 1 Ω If the result is not as specified, replace the master switch assembly.
- Apply battery voltage to the master switch terminals and check the AUTO light.
OK
MEASUREMENT SPECIFIED CONDITIONMeasurement Condition Specified Condition Battery positive (+) --> Terminal 6 (B)
Battery negative (-) --> Terminal 3 (E)AUTO light illuminates If the result is not as specified, replace the master switch assembly.
- Measure the resistance between each terminal of the connector when the switch is operated.
Use the Manual With the Right Hardware
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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.