Guided Troubleshooting

Confirm the symptom

Record whether lights dim, a relay clicks, the starter clicks, or nothing happens.

Check battery condition

Measure open-circuit voltage and voltage during the crank request. Inspect both cable ends and grounds; do not judge a battery by static voltage alone.

Check start authorization

Verify Park/Neutral or clutch-switch input and inspect security/immobilizer indicators.

Test the starter circuit

Using the correct wiring diagram, verify control voltage at the starter relay and solenoid during the crank request.

Confirm the mechanical condition

If the starter receives correct power and ground, verify the engine can rotate safely before replacing the starter.