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 Windows do not Operate at All: Procedure
- INSPECT FUSES (ECU-B, ECU-IG)
- Remove the ECU-B fuse from the engine room relay block.
- Remove the ECU-IG fuse from the main body ECU.
- Measure the resistance.
Standard resistance
Below 1Ω
- Reinstall the fuses.
NG → REPLACE FUSE
OK: Go to next step
- INSPECT MAIN BODY ECU (PWR RELAY)
- Remove the POWER fuse from the main body ECU.
- Turn the ignition switch to ON.
- Measure the voltage between the POWER fuse terminal of the main body ECU and body ground.
Standard voltage
Tester Connections Ignition Switch Conditions Specified Conditions POWER fuse terminal (1) - Body ground ON 11 to 14 V - Reinstall the POWER fuse.
NG → REPLACE MAIN BODY ECU (PWR RELAY)
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (POWER WINDOW MASTER SWITCH - BATTERY AND BODY GROUND)
- Disconnect the G1 power window regulator master switch assembly connector.
- Measure the voltage of the wire harness side connector.
Standard voltage
3 Door
Tester Connection Condition Specified Condition G1-15 (B)- Body ground Ignition switch ON 11 to 14 V Standard voltage
Except 3 door
Tester Connection Condition Specified Condition G1-6 (B)- Body ground Ignition switch ON 11 to 14 V - Measure the resistance of the wire harness side connector.
Standard resistance
3 Door
Tester Connection Specified Condition G1-7 (E)- Body ground Below 1 Ω Standard resistance
Except 3 door
Tester Connection Specified Condition G1-1 (E)- Body ground Below 1 Ω - Reconnect the G1 power window regulator master switch assembly connector.
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY
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.