BY Service Manual
12-1
BY Service Manual
Section 12
ELECTRICAL AND
ECU
Page
Before You Begin Servicing .......................................................... 12-3
Introduction.................................................................................... 12-5
Specifications ................................................................................ 12-5
Special Torque Chart............................................................... 12-5
Function Description - Engine Management System .................... 12-6
Component Locations.............................................................. 12-6
Electrical Panel Connector (X1) Connections ....................... 12-11
Engine Control Unit (ECU) Assignments............................... 12-12
Component Tests........................................................................ 12-14
Relays.................................................................................... 12-14
Oil Pressure Sensor .............................................................. 12-15
Fuel Injector........................................................................... 12-16
Engine Coolant Temperature Sensor.................................... 12-16
Fuel Rail Pressure Control Valve .......................................... 12-17
Water-in-Fuel Sensor ............................................................ 12-17
Crankshaft Speed Sensor ..................................................... 12-18
Glow Plug / Control Unit ........................................................ 12-18
Fuel Temperature Sensor...................................................... 12-20
Fuel Volume Regulator.......................................................... 12-20
Charge Air Temperature Sensor ........................................... 12-21
Charge Air Pressure Sensor.................................................. 12-21
Fuel Rail Pressure Sensor..................................................... 12-22
Camshaft Speed Sensor ....................................................... 12-22
Throttle Position Sensor ........................................................ 12-23
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