No Communication With ECM
Symptom:NO COMMUNICATION WITH ECM
When Monitored and Set Condition:
When Monitored: Ignition On - Continuously
Set Condition: When the CAB fails to receive all messages from the ECM.
POSSIBLE CAUSES
^ NO COMMUNICATION WITH BUS
^ ENGINE CONTROL MODULE DTC(S) PRESENT
^ ENGINE CONTROL MODULE'S POWER/GROUND CIRCUIT(S) SHORTED OR OPEN
^ CAN C BUS (+)/CAN C BUS (-) CIRCUIT(S) OPEN TO ENGINE CONTROL MODULE
^ CAN C BUS (+)/CAN C BUS (-) CIRCUIT(S) OPEN TO CAB
^ ANTI-LOCK BRAKE CONTROLLER
^ ENGINE CONTROL MODULE
