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.
Inspection Procedure
- INSPECT FUSE (ECU-IG1, AM1, P/W (FL))
- Check continuity of ECU-IG1, AM1 and P/W (FL) fuses.
OK: Continuity
NG: REPLACE FUSE
OK: GO TO NEXT STEP
- Check continuity of ECU-IG1, AM1 and P/W (FL) fuses.
- CHECK POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (BATTERY VOLTAGE)
- Turn the ignition switch OFF.
- Measure the voltage between terminals CPUB, SIG, BDR and GND.
Standard voltage
POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (BATTERY VOLTAGE)Terminal Name Condition Specified Condition CPUB Always 10 to 14 V BDR Always 10 to 14 V SIG Ignition switch ON 10 to 14 V GND Always Below 1 V
NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
OK: GO TO NEXT STEP
- CHECK WIRE HARNESS (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY - BODY GROUND)
- Refer to inspection (see ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
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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.