Pinpoint Test B: Unusual Starter Noise

Starting System

Pinpoint Tests

Pinpoint Test B: Unusual Starter Noise

This pinpoint test is intended to diagnose the following:
- Starter mounting
- Flexplate/ring gear
- Starter motor



PINPOINT TEST B: UNUSUAL STARTER NOISE

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B1 CHECK THE STARTER MOUNTING


- Inspect the starter motor mounting bolts for looseness.
- Is the starter motor mounted correctly?

Yes
GO to B2.

No
INSTALL the starter motor correctly. REFER to Starter Motor Service and Repair. TEST the system for normal operation.

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B2 CHECK FOR ENGINE NOISE


- Ignition OFF.
- Connect a remote starter switch between the starter motor solenoid C197a, circuit 2037 (RD) and C197b, circuit 113 (YE/LB) 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 B3.

No
REFER to Engine to continue the diagnosis. Testing and Inspection

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B3 CHECK FOR UNUSUAL WEAR


- Remove the starter motor. Refer to Starter Motor Service and Repair.
- Inspect the flexplate ring gear for damaged or worn teeth.
- Is the noise due to flexplate ring gear tooth damage?

Yes
INSTALL a new flexplate. 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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