• If there is no FICM SYNC while cranking the engine, then the problem is limited to the circuit illustrated above. The FICM SYNC circuit relays information from the PCM to the FICM.
• Engine Wiring Harness: FICM SYNC occurs through two circuits between the FICM and PCM. Verify engine wiring
harness circuits CMPO and CKPO. If one of these two circuits has a short/open, FICM SYNC will not occur.
• PCM: If the PCM is not working properly, FICM SYNC may not occur.
• FICM: If the FICM is not working properly, FICM SYNC may not occur.