Yanmar 4BY - Troubleshooting

BY Service Manual
13-1
BY Service Manual
Section 13
TROUBLESHOOTING
Page
Introduction.................................................................................... 13-3
Engine Faults and Torque Limitations........................................... 13-3
Torque Limitation for Failed Sensors....................................... 13-3
Torque Limitation for Smoke Limitation................................... 13-3
Torque Limitation for Overheat Protection............................... 13-5
Troubleshooting Chart................................................................... 13-6
Starting Trouble....................................................................... 13-6
Exhaust Color.......................................................................... 13-6
Vibration - Drive Disengaged................................................... 13-7
Vibration - Drive Engaged ....................................................... 13-7
Engine Knocks......................................................................... 13-8
Low Power Output................................................................... 13-8
Engine Overheat...................................................................... 13-8
Engine Runs Cold.................................................................... 13-9
Coolant Loss............................................................................ 13-9
Helm Panel Display ................................................................. 13-9
Trouble Codes............................................................................. 13-10
Working Procedure................................................................ 13-10
Diagnostic Trouble Codes ..................................................... 13-10
After Troubleshooting or Repair .................................................. 13-13