P1687

Tests 1 - 3:

Test 4:

SYMPTOM
P1687-NO CLUSTER BUS MESSAGE

WHEN MONITORED
With the ignition ON.

SET CONDITION
The PCM does not receive an expected Cluster Status Bus message from the instrument cluster within the last 20 seconds.

POSSIBLE CAUSES
- Checking cluster communication
- PCI BUS circuit open
- PCM - internal failure
- Intermittent condition