Pinpoint Test D: Unusual Starter Noise
Starting System
Pinpoint Tests
Pinpoint Test D: Unusual Starter Noise
This pinpoint test is intended to diagnose the following:
- Starter motor
- Ring gear
PINPOINT TEST D: UNUSUAL STARTER NOISE
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D1 CHECK THE STARTER MOUNTING
- Inspect the starter mounting bolts for looseness.
- Is the starter motor mounted correctly?
Yes
GO to D2.
No
INSTALL the starter motor correctly. REFER to Starter Motor Service and Repair. TEST the system for normal operation.
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D2 CHECK FOR ENGINE NOISE
- Ignition OFF.
- Connect a remote starter switch between the starter solenoid B- and S-terminals.
- Engage the starter motor and verify the noise is due to the starter operation.
- Is the noise due to the starter motor engagement?
Yes
GO to D3.
No
REFER to Engine to continue diagnosis. Testing and Inspection
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D3 CHECK FOR UNUSUAL WEAR
- Remove the starter motor.
- Inspect the ring gear for damaged or worn teeth.
- Is the noise due to ring gear tooth damage?
Yes
INSTALL a new flexplate ring gear. EXAMINE the starter pinion teeth. If damaged, INSTALL a new starter motor. REFER to Starter Motor Service and Repair. TEST the system for normal operation.
No
INSTALL a new starter motor. REFER to Starter Motor Service and Repair. TEST the system for normal operation.
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