Pinpoint Test C: Unusual Starter Noise
Starting System
Refer to Wiring Diagram Set 20 for schematic and connector information Diagrams By Number.
Pinpoint Tests
Pinpoint Test C: Unusual Starter Noise
Refer to Wiring Diagram Set 20 for schematic and connector information Diagrams By Number.
In normal operation, voltage from Smart Junction Box (SJB) fuse 27 (20A) is supplied to the ignition switch through circuit SBP27 (BU/RD). When the ignition switch is placed in the START position, voltage is supplied through circuit CDC35 (BU/WH) to the starter relay. The starter relay is supplied ground from the PCM through circuit CDC12 (YE). Power is supplied at all times to the starter motor from the battery through circuit SDC02 (RD). The starter relay has voltage supplied at all times from Battery Junction Box (BJB) fuse 13 (30A), through circuit SBB13 (GY/RD). When the starter relay is energized, voltage supplied to the starter relay is sent to the starter motor solenoid through circuit CDC25 (BN/GN). The starter motor is disengaged when the key is released from the START position.
This pinpoint test is intended to diagnose the following:
- Starter mounting
- Starter motor
- Incorrect starter drive engagement
PINPOINT TEST C: UNUSUAL STARTER NOISE
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C1 CHECK THE STARTER MOTOR MOUNTING
- Inspect the starter motor mounting brackets for cracks.
- Check the starter motor mounting bolts for looseness.
- Is the starter motor mounted correctly?
Yes
GO to C2.
No
REINSTALL the starter motor correctly.
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C2 INSPECT THE STARTER MOTOR
- Remove the starter motor.
- Inspect the starter motor for damage.
- Is the starter motor damaged?
Yes
INSTALL a new starter motor. TEST the system for normal operation.
No
CHECK the starter motor gear and the flexplate ring gear. REFER to Starter Motor Drive Gear and Flywheel Ring Gear Inspection Starter Motor Drive Gear and Flywheel Ring Gear Inspection. INSTALL new components as necessary. TEST the system for normal operation.
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