10i. Check FICM Synchronization While Cranking

10i. CHECK FICM SYNCHRONIZATION WHILE CRANKING

Purpose:
The purpose of this test is to verify the PCM and FICM synchronization.

Data List
- The scan tool may reset below 9.5 volts.
- Select the parameters indicated from the scan tool parameter list and monitor while cranking the engine.







Recommended Procedure:
- Connect the scan tool.
- Key ON, engine OFF.
- Access and monitor the FICMSYNC PID while cranking the engine.

No FICM synchronization while cranking the engine with the ICP, RPM and VPWR signals correct usually indicates a loss of the CMP or CKP synchronization signal. Refer to the appropriate pinpoint test for diagnosis. Refer to Reference Values, Typical Diagnostic Reference Values for normal operating values. Typical Diagnostic Reference Values

Possible Causes:
- PCM
- FICM
- CKP synchronization signal
- CMP synchronization signal

Tools Required:
Scan tool