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.
Diagnosis Procedure
- CHECK PUSH-BUTTON IGNITION SWITCH INPUT SIGNAL
- Turn ignition switch OFF.
- Disconnect push-button ignition switch connector.
- Check voltage between push-button ignition switch harness connector and ground.
(+) (-) Voltage (V) (Approx.) Push-button ignition switch Connector Terminal M101 3 Ground Battery voltage Is the inspection normal?
YES: GO TO 2.
NO-1: Check 10 A fuse [No. 13, located in fuse block (J/B)].
NO-2: Check harness for open or short between push-button ignition switch and fuse.
- CHECK BCM INPUT
- Connect push-button ignition switch connector.
- Disconnect BCM connector.
- Check voltage between BCM connector and ground.
(+) (-) Voltage (V) (Approx.) BCM Connector Terminal M70 91 Ground Battery voltage Is the inspection normal?
YES: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".
NO: GO TO 3.
- CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT
- Disconnect push-button ignition switch connector.
- Check continuity between BCM harness connector and push-button ignition switch harness connector.
BCM Push-button ignition switch Continuity Connector Terminal Connector Terminal M70 91 M101 7 Existed - Check continuity between BCM harness connector and ground.
BCM Ground Continuity Connector Terminal M70 91 Not existed Is the inspection normal?
YES: Replace push-button ignition switch.
NO: Repair or replace harness.
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.