Yes | CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, Click here to access Guided Routine (BCM). |
|---|---|
No | The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. |
Unusual Starter Noise
Normal Operation and Fault Conditions
Correct starter operation relies on correct mounting of the starter to the engine, alignment of the starter ring gear to the flexplate and correct functioning of the starter assembly (internal gears, bearings).
Possible Sources
Engine Starter motor Starter motor mounting
Visual Inspection and Diagnostic Pre-checks
Inspect the starter motor. Inspect the starter motor mounting.
PINPOINT TEST B : UNUSUAL STARTER NOISE
B1 CHECK THE STARTER MOUNTING
Inspect the starter mounting bolts for looseness.
Is the starter motor mounted correctly?
Yes | GO to B2 |
|---|---|
No | INSTALL the starter motor correctly. REFER to: Starter Motor (303-06C Starting System - 5.0L 32V Ti-VCT/5.0L Ti-VCT V8 (308kW/418PS), Removal and Installation). |
B2 CHECK FOR STARTER NOISE
Ignition OFF. Connect a remote starter switch between the starter solenoid C197A-1 ("B" terminal) and C197C-1 ("S" terminal). Engage the starter and verify the noise is due to starter operation.
Is the noise due to the starter engagement?
Yes | REFER to: Starter Motor (303-06C Starting System - 5.0L 32V Ti-VCT/5.0L Ti-VCT V8 (308kW/418PS), Removal and Installation). |
|---|---|
No | REFER to: Engine (303-00) . to continue diagnosis. |
C113A:11 or C113A:15
Refer to Wiring Diagrams Cell 23 for schematic and connector information.
Normal Operation and Fault Conditions
The wake-up control circuit wakes up the PCM prior to the engine cranking. The PCM needs to wake up prior to a crank request so it has time to go through its initialization. The wake-up control circuit is controlled by the BCM. The BCM activates the wake-up control circuit when the driver door is opened or when the ignition is in the ON or START position.
DTC Fault Trigger Conditions
DTC | Description | Fault Trigger Conditions |
|---|---|---|
C113A:11 | PCM Wakeup Control: Circuit Short to Ground | This DTC is set by the BCM when a short to ground is detected on the wake-up control circuit. |
C113A:15 PCM Wakeup Control: Circuit Short to Battery or Open | This DTC is set by the BCM when a short to voltage or an open is detected on the wake-up control circuit. |
Possible Sources
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