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 Source Mode does not Change: Procedure
- CHECK FOR DTC
- Delete the DTCs.
HINT:
After all DTCs are cleared, check if the trouble occurs again 5 seconds after the power switch is turned ON (IG).
- Check for DTCs again.
OK
No DTC is output.
NG → GO TO DTC CHART
OK: Go to next step
- Delete the DTCs.
- CHECK BASIC FUNCTION
- When the key is inside the vehicle and the shift lever position is in P, check that depressing the brake pedal causes the power switch indicator to illuminate green.
Result
Result Proceed to Indicator illuminates green A Power switch indicator circuit is normal but indicator does not illuminate green B Room oscillator recognizes key but indicator does not illuminate green C
C → GO TO POWER SWITCH INDICATOR CIRCUIT
B → GO TO ROOM OSCILLATOR DOES NOT RECOGNIZE KEY
A → REPLACE POWER SOURCE CONTROL ECU
- When the key is inside the vehicle and the shift lever position is in P, check that depressing the brake pedal causes the power switch indicator to illuminate green.
NO RELATED
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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.