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.
Problem Symptoms Table
HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
| Symptom | Suspected Area | See |
|---|---|---|
| Power Source Mode does not Change to ON (IG and ACC) | Indoor electrical key oscillator*1 | Refer to Room Oscillator does not Recognize Key |
| Smart key system (for Entry function) | Refer to Power Source Mode does not Change to ON (IG and ACC) | |
| AM2 fuse | - | |
| Power management control ECU | - | |
| Power switch | - | |
| Wire harness or connector | - | |
| Power Source Mode does not Change to ON (IG) | Indoor electrical key oscillator*1 | Refer to Room Oscillator does not Recognize Key |
| AM2 fuse | Refer to Power Source Mode does not Change to ON (IG) | |
| IG1 relay | - | |
| IG2 relay | - | |
| Instrument panel junction block assembly | - | |
| Engine room relay block | - | |
| Power management control ECU | - | |
| Wire harness or connector | - | |
| Power Source Mode does not Change to ON (ACC) | Indoor electrical key oscillator*1 | Refer to Room Oscillator does not Recognize Key |
| AM2 fuse | Refer to Power Source Mode does not Change to ON (ACC) | |
| ACC relay | - | |
| Instrument panel junction block assembly | - | |
| Power management control ECU | - | |
| Wire harness or connector | - | |
| Power Source Mode does not Change to ON (Ready) | Indoor electrical key oscillator*1 | Refer to Room Oscillator does not Recognize Key |
| Smart key system (for Entry function) | Refer to Power Source Mode does not Change to ON (READY) | |
| Stop light switch | - | |
| Engine room relay block | - | |
| Engine immobilizer system | - | |
| Hybrid control system | - | |
| Transmission control ECU assembly | - | |
| Power management control ECU | - | |
| Wire harness or connector | - |
- *1: w/o Entry Function
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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.
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