P1652

Test 1-3:

Test 4-5:

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.

POSSIBLE CAUSES
- NO COMMUNICATION WITH MIC
- NO COMMUNICATION WITH PCM
- INTERMITTENT WIRING AND CONNECTORS
- TRANSMISSION CONTROL MODULE