Yanmar CANplus 600 - Engine Troubleshooting

Yanmar
®
600 Control Panel Operation and Troubleshooting
463-3000-09 Initial - 16-May-2008 27
Engine Troubleshooting
Note
Most problems with ECU controlled engines can be pinpointed via the ECU diagnostic messages.
Use the display or ECU diagnostic tool to view fault codes.
All engine state information and diagnostic codes shown
by the CANplus display are provided by the CANbus.
ECU programming determines the response to warnings and failures.
Typically the ECU can be programmed to shutdown, derate or run to failure.
ECU does not power-up
Possible Cause Possible Remedy
No power to ECU Locate reason for lack of power and correct (Circuit overloaded? Failed
suppressor diode? Faulty wiring?)
Tripped overcurrent protection Correct fault, replace or reset overcurrent protection
Faulty ECU Replace ECU
Optional e-stop engaged Disengage e-stop
Engine not getting fuel
Possible Cause Possible Remedy
Empty fuel tank Fuel engine
Clogged filter Replace filter
Air in fuel lines Bleed fuel lines
Low fuel pressure Replace faulty fuel pump and/or clogged filter
Faulty fuel pump Replace fuel pump, correct wiring fault (electric fuel pump)
Preheat Troubleshooting
Engine is hard to start in cold conditions
Possible Cause Possible Remedy
Start attempt before preheat
complete
Wait for preheat time to elapse, crank as soon as time elapses
Heater faulty Replace heater
Heater relay faulty Replace relay
Preheat control not functioning Correct wiring, correct ECU configuration
Faulty control system Repair or replace ECU
Engine produces excessive white smoke after starting
Possible Cause Possible Remedy
Afterglow not enabled Reconfigure ECU
Heater faulty Replace heater
Heater relay faulty Replace relay
Preheat control not functioning Correct wiring, correct ECU configuration
Faulty control system Repair or replace ECU