P1652

SYMPTOM
P1652 - SERIAL COMMUNICATION LINK MALFUNCTION

WHEN MONITORED
Continuously with engine running.

SET CONDITION
The DTC sets in approximately 20 seconds if no BUS messages are received by the TCM.

NOTE: Due to the integration of the Powertrain and Transmission Control Modules, bus communication between the modules is internal.

POSSIBLE CAUSES
- Engine communication DTC's present
- Intermittent wiring and connectors
- PCM - Serial communication link