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 Typical Diagnostic Reference Values for normal operating values.

Possible Causes:

^ PCM
^ FICM
^ CKP synchronization signal
^ CMP synchronization signal

Tools Required:

Scan tool