Yanmar 6BY2 - Electrical and ECU

BY Service Manual
12-1
© 2009 Yanmar Marine International
BY Service Manual
Section 12
ELECTRICAL
AND ECU
Page
Safety Precautions ........................................................................ 12-3
Introduction.................................................................................... 12-3
Specifications ................................................................................ 12-3
Special Torque Chart............................................................... 12-3
Function Description - Engine Management System .................... 12-4
Component Locations.............................................................. 12-4
Electrical Panel Connector (X1) Connections ......................... 12-8
Engine Control Unit (ECU) Assignments............................... 12-10
Component Tests........................................................................ 12-12
Relays.................................................................................... 12-12
Oil Pressure Sensor .............................................................. 12-14
Fuel Injector........................................................................... 12-14
Engine Coolant Temperature Sensor.................................... 12-15
High-Pressure Fuel Regulator............................................... 12-15
Water-in-Fuel Sensor ............................................................ 12-16
Crankshaft Speed Sensor ..................................................... 12-16
Glow Plug / Control Unit ........................................................ 12-17
Fuel Temperature Sensor...................................................... 12-18
Fuel Volume Regulator.......................................................... 12-18
Charge Air Temperature Sensor ........................................... 12-19
Charge Air Pressure Sensor.................................................. 12-19
High-Pressure Fuel Rail Pressure Sensor............................. 12-20
Camshaft Speed Sensor ....................................................... 12-20
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