Yanmar 6BY2 - Page 9

TABLE OF CONTENTS
12/05
BY Service Manual
ix
© 2009 Yanmar Marine International
Throttle Position Sensor ........................................................ 12-21
Repair.......................................................................................... 12-22
Replace Engine Control Unit (ECU) ...................................... 12-22
Replace Coolant Temperature Sensor.................................. 12-22
Replace Charge Air Pressure Sensor ................................... 12-23
Replace Charge Air Temperature Sensor ............................. 12-23
Replace Crankshaft Sensor................................................... 12-24
Replace Camshaft Sensor..................................................... 12-24
Replace High-Pressure Fuel Regulator................................. 12-25
Replace High-Pressure Fuel Rail Pressure Sensor .............. 12-26
Replace Fuel Temperature Sensor ....................................... 12-26
Replace Fuel Volume Regulator............................................ 12-27
Replace Oil Pressure Sensor ................................................ 12-27
Troubleshooting................................................................................ 13-1
Safety Precautions ........................................................................ 13-3
Introduction.................................................................................... 13-3
Engine Faults and Torque Limitations........................................... 13-3
Torque Limitation for Failed Sensors Mode............................. 13-3
Torque Limitation for Smoke Limitation Mode......................... 13-3
Torque Limitation for Overheat Protection Mode..................... 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 .................................................. 13-14