No Comm from Tri-Stepper
system
Description
Main microprocessor cannot communicate with the Tri-stepper over the CAN bus, and the unit shuts down and alarms.
Activation Conditions
Main microprocessor cannot communicate with the Tri-stepper over the CAN bus.
Unit Behavior
Engine and Electric Operation: Shut down and alarm.
Reset Conditions
Auto reset when CAN communication is restored, alarm reset or alarm may be manually reset by turning the unit off, then back on again.
Corrective Actions
1. Check both active and inactive alarms for other “NCOMM” alarms. a. If more than one alarm, record all and proceed to step 3. b. If this is the only “NO COMM” alarm, replace module. 2. Check CAN bus a. Inspect connector pins AND terminals on 1MSM. Verify no damage or corrosion in connections. b Check for CAN circuit continuity. if good continuity is not present, check connectors and wiring between terminals for damage, moisture or corrosion. Repair if required. 3. Check system - Clear active and inactive alarms. Start unit and monitor for additional “NO COMM” alarms.