Common faults and diagnosis methods of starter
2025-10-22
Starter does not turn
Possible causes: battery power loss, circuit failure (such as fuse blowing, poor wire contact), electromagnetic switch failure, internal open circuit of the motor, etc.
Diagnosis method: check the battery voltage, circuit on and off, and electromagnetic switch pull-in. If necessary, disassemble the motor and check the windings and brushes.
Starter running weak
Possible causes: insufficient battery power, brush wear, poor contact of commutator, internal short circuit of motor, etc.
Diagnosis method: measure the battery voltage, check the contact between the brush and the commutator, and replace the brush or motor if necessary.
Starter idling
Possible causes: the drive gear and the flywheel are not meshed (such as one-way clutch slipping), the flywheel ring gear is damaged, etc.
Diagnosis method: Check the meshing of the drive gear and the flywheel, and replace the flywheel ring gear or one-way clutch if necessary.
Abnormal sound of starter
Possible causes: drive gear wear, bearing damage, transmission mechanism stuck, etc.
Diagnosis method: Disassemble the starter to check the gears, bearings and transmission mechanism, and replace the damaged parts if necessary.
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