The (VECU) Vehicle Electronic Control Unit supplies and monitors the cranking signal to the starter motor relay. Several types of starter cranking protection are provided so the starter cannot be engaged in unwanted conditions. The starter cranking protection will also limit the maximum cranking time to 18 seconds without cycling the key.
Observable symptoms
1) Starter motor does not run
Probable cause
1) Batteries
2) Starter motor solenoid
3) Starter motor
4) Open circuit electric cables
5) The starter pinion does not mesh with the gear ring on the flywheel
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