ASE G1 Auto Maintenance and Light RepairElectrical/Electronic SystemsMedium
A vehicle's engine cranks over normally, but the starter motor continues to run even after the ignition key is released from the 'START' position. Which of the following is the MOST likely cause of this condition?
- AA weak battery.
- BCorroded battery terminals.
- CA shorted starter motor.
- DA faulty starter solenoid.
Show answer & explanationAnswer & explanation
Correct answer: D. A faulty starter solenoid.
If the starter solenoid's pull-in or hold-in windings remain energized, or if its contacts weld shut, the starter motor will continue to operate even after the key is released. This indicates a failure within the solenoid itself.
Why the other options are wrong
- A. A weak battery would result in slow cranking or no cranking, not continuous starter operation after key release.
- B. Corroded battery terminals would impede current flow, leading to slow cranking or a no-start condition, not continuous starter operation.
- C. A shorted starter motor would likely prevent it from operating at all or cause it to draw excessive current, but not necessarily cause continuous operation after key release.
Stuck Starter Solenoid
A condition where the starter motor continues to operate even after the ignition key is released from the 'START' position, typically due to welded contacts or a continuously energized solenoid.
- Starter motor runs continuously after key release.
- Indicates an issue with the starter solenoid.
- Can drain battery and damage starter/flywheel.
Memory trick: Key released, but the starter won't 'let go' – it's stuck!