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: Inspection
- POWER WINDOW SYSTEM CIRCUIT
- INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSY
- Measure the resistance of the master switch.
Driver's switch (Window unlock and lock)
TESTER CONNECTION AND SPECIFIED CONDITION (1 OF 8)Switch 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 1Ω E(1)-E(3)-DD(9) DOWN E(1)-E(3)-DU(4) Below 1Ω B (6) - B (7) - DD (9) DOWN AUTO E(1)-E(3)-DU(4) Below 1Ω B (6) - B (7) - DD (9) Front passenger's switch (Window unlock)
TESTER CONNECTION AND SPECIFIED CONDITION (2 OF 8)Switch Condition Tester Connection Specified Condition UP E(1)-E(3)-PD(15) Below 1Ω 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 1Ω B(6)-B(7)-PD(15) Front passenger's switch (Window lock)
TESTER CONNECTION AND SPECIFIED CONDITION (3 OF 8)Switch Condition Tester Connection Specified Condition UP B(6)-B(7)-PU(18) Below 1Ω OFF PD(15)-PU(18) Below 1Ω DOWN B(6)-B(7)-PD(15) Below 1Ω Rear left switch (Window unlock)
TESTER CONNECTION AND SPECIFIED CONDITION (4 OF 8)Switch Condition Tester Connection Specified Condition UP E(1)-E(3)-RLD(13) Below 1Ω B(6)-B(7)-RLU(12) OFF E(1)-E(3)-RLD(13) Below 1Ω E(1)-E(3)-RLU(12) DOWN E(1)-E(3)-RLU(12) Below 1Ω B(6)-B(7)-RLD(13) Rear left switch (Window lock)
TESTER CONNECTION AND SPECIFIED CONDITION (5 OF 8)Switch Condition Tester Connection Specified Condition UP B(6)-B(7)-RLU(12) Below 1Ω OFF RLU(12)-RLD(13) Below 1Ω DOWN B(6)-B(7)-RLD(13) Below 1Ω Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Rear right switch (Window unlock)
TESTER CONNECTION AND SPECIFIED CONDITION (6 OF 8)Switch Condition Tester Connection Specified Condition UP B(6)-B(7)-RRU(10) Below 1Ω 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 1Ω B(6)-B(7)-RRD(16) Rear right switch (Window lock)
TESTER CONNECTION AND SPECIFIED CONDITION (7 OF 8)Switch Condition Tester Connection Specified Condition UP B(6)-B(7) -RRU(10) Below 1Ω OFF RRU(10)-RRD(16) Below 1Ω DOWN B(6)-B(7)-RRD(16) Below 1Ω If the result is not as specified, replace the master switch.
- Inspect the master switch illumination.
- 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.