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14 -18
GENERAL DIAGNOSIS—DIESEL ENGINE
B R
D I E S E L E N G I N E — G E N E R A L D I A G N O S I S
INDEX
page
Air in Fuel System
101
Automatic Shutdown (ASD) Relay Test
. . . . . . . .
102
Diagnostic Trouble Code (DTC)
117
DRB Scan Tool
117
Engine Speed Sensor Test
102
Fuel Filter/Water Separator Test
102
Fuel Heater Relay Test
104
Fuel Heater Test .
103
Fuel Injection Pump Test
105
Fuel Injection Pump Timing
119
Fuel Injector Test
104
Fuel Shutdown Solenoid Relay Test
107
Fuel Shutdown Solenoid Test
. . . . . . . . . . . . . . .
105
Fuel Supply Restrictions
105
Fuel Transfer Pump Pressure Test
107
General Information
98
High-Pressure Fuel Line Leak Test
. 109
Idle Speed Adjustment
110
GENERAL INFORMATION
This section of the group will cover a general diag
nosis of diesel engine fuel system components. For an
operational description, refer to the Diesel Engine—
Component Description/System Operation section of
this group. For component removal and installation
procedures, refer to the Diesel Engine—Component
Removal/Installation section of this group.
page
Intake Manifold Air Heater Relay Test
112
Intake Manifold Air Heater Test
110
Intake Manifold Air Temperature Sensor Test
. . . . 112
On-Board Diagnostics (OBD)—Diesel Powered
Vehicles
115
Powertrain Control Module (PCM) 60-Way
Connector
101
Powertrain Control Module Testing
113
Relays—Operation/Testing
113
Starter Motor Relay Test
. . . . . . . . . . . . . . . . . . .
114
System Diagnosis Charts
119
System Schematics
101
Throttle Position Sensor Test . . . . . . . . . . . . . . . .
114
Transmission Temperature Sensor Test
114
Vehicle Speed Sensor Test
115
Visual Inspection
100
Water-ln-Fuel Warning Lamp
115
Although various components, relays and switches
are operated by the powertrain control module
(PCM), the diesel fuel injection system (Fig. 1) is not
directly regulated by the PCM. Refer to Powertrain
Control Module (PCM) for additional information.
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