FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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Transmission Code








SYMPTOM
P1687 - NO COMMUNICATION WITH THE MIC

WHEN MONITORED
Continuously with engine running.

SET CONDITION
The code sets in approximately 25 seconds if no BUS messages are received form the MIC.

POSSIBLE CAUSES
- OTHER BUS PROBLEMS PRESENT
- INTERMITTENT WIRING AND CONNECTORS
- MIC - NO COMMUNICATION
- TCM - BUS COMMUNICATION