BUS System Communication

Symptom:
BUS SYSTEM COMMUNICATION FAILURE

When Monitored:
Ignition ON, continuously

Set Condition:
When the CAB does not receive a message from the instrument cluster for 10 seconds.

Test 1-2:

Test 3-4:

POSSIBLE CAUSES
- INTERMITTENT CONDITION
- ELECTRO-MECHANICAL INSTRUMENT CLUSTER DTC PRESENT
- BUS CIRCUIT OPEN
- CAB - INTERNAL FAILURE