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DSG-423
Engine distributors DSG-423 User Manual
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DSG-423 ENGINE CONTROL
S
08-12
GCP - Power Distribution Box
Fuse
Amps
Circuits protected
1
10
Battery Voltage to EPR
2
5
Ignition Voltage to GCP and Relays
3
10
Battery Voltage to GCP
4
15
Fuel pump
5
15
Battery Voltage out of Power Relay
6
-
Not used
1
2
3
4
5
6
Fuel pump
Starter
Empty
Relay
Relay
Part of -5250010- Wiring Harness
Power
Relay
188
190
Table of Contents
Dsg-423 General Information Index 01
4
Table of Contents
4
Safety Notice
6
General Information
6
Notes, Cautions, and Warnings
6
Battery Handling and Charging
7
Engine Identification
8
Parts and Service
8
Description and Operation
8
Special Tools
9
Inspection and Verification
10
Pcv System Malfunction
13
Engine Oil Leaks
13
Compression Tests
15
Cylinder Leakage Detection
16
Intake Manifold Vacuum Test
16
Excessive Engine Oil Consumption
18
Oil Pressure Test
19
Valve Train Analysis – Static
20
Valve Train Analysis – Dynamic
20
Hydraulic Valve Lash Adjuster
23
Camshaft Runout
25
Camshaft End Play
25
Crankshaft Main Bearing Journal Diameter
26
Crankshaft Main Bearing Journal Taper
26
Crankshaft Main Bearing Journal Clearance
27
Crankshaft End Play
28
Crankshaft Runout
28
Cylinder Bore Taper
28
Cylinder Bore Out-Of-Round
29
Piston Inspection
29
Piston Diameter
29
Piston to Cylinder Bore Clearance
29
Piston Ring End Gap
30
Crankshaft Connecting Rod Journal Diameter
31
Connecting Rod Cleaning
31
Connecting Rod Twist
32
Connecting Rod Larger End Bore
32
Piston Pin Diameter
32
Connecting Rod Bushing Diameter
32
Connecting Rod Bend
32
Connecting Rod Piston Pin Side Clearance
33
Connecting Rod Journal Clearance
33
Roller Follower Inspection
34
Hydraulic Lash Adjuster Inspection
34
Valve Stem Diameter
35
Valve Stem-To-Valve Guide Clearance
35
Valve Inspection
35
Valve Guide Inner Diameter
36
Valve Guide Reaming
36
Valve Spring Installed Length
36
Valve Spring Free Length
36
Valve Spring Out-Of-Square
36
Valve Spring Compression Pressure
37
Valve and Seat Refacing Measurements
37
Valve Seat Width
37
Valve Seat Runout
37
Flywheel Inspection
38
Oil Pump Gear Radial Clearance
38
Oil Pump Rotor Inspection
38
Oil Pump Side Clearance
38
Cylinder Bore Honing
39
Cylinder Bore Cleaning
39
Cylinder Block Core Plug Replacement
40
Cylinder Head - Distortion
40
Spark Plug Thread Repair
42
Exhaust Manifold Straightness
43
Specifications
44
Section 2
45
Engine Cooling System
47
Positive Crankcase Ventilation System
47
Drive Belt System
49
Ignition System
49
Fuel System
49
Lubrication System
49
Camshaft Cover - Removal
50
Intake Manifold - Installation
50
Intake Manifold - Removal
50
Camshaft Cover - Installation
51
Crankshaft Pulley - Removal
52
Crankshaft Pulley - Installation
53
Crankshaft Front Seal - Installation
54
Crankshaft Front Seal - Removal
54
Engine Front Cover - Removal
55
Engine Front Cover - Installation
56
Timing Drive Components - Removal
58
Timing Drive Components - Installation
59
Valve Spring - Installation
60
Valve Spring - Removal
60
Valve Seal - Installation
61
Valve Seal - Removal
61
Camshafts - Installation
62
Camshafts - Removal
62
Valve Tappet - Replacement
62
Exhaust Manifold - Installation
63
Exhaust Manifold - Removal
63
Cylinder Head - Installation
64
Cylinder Head - Removal
64
Oil Filter Adapter - Installation
67
Oil Level Indicator & Tube - Replacement
68
Oil Filter Adapter - Removal
67
Oil Pressure Sender - Replacement
67
Oil Pan - Removal
68
Oil Pan - Installation
69
Oil Pickup Tube - Replacement
69
Oil Pump - Installation
70
Oil Pump - Removal
70
Crankshaft Rear Seal/Retainer - Installation
71
Crankshaft Rear Seal/Retainer - Removal
71
Flywheel/Flexplate - Replacement
71
Engine Disassembly
72
Disassembly & Assembly
72
Cylinder Head Disassembly
77
Engine Cleaning
78
Cylinder Head Assembly
79
Engine Assembly
80
Valve Clearance Check
89
Removal and Installation
99
Section 3
101
Cautions & Warnings
103
General Information - Gasoline
103
Fuel System Requirements
104
Wiring Diagrams
105
General Information - Dry Fuel
107
Diagnosis and Testing - NG
110
Diagnosis and Testing - Lpg
110
Preliminary Test
111
Diagnostic Charts
112
Engine Backfires
122
Engine Overheats
127
Visual Inspection
130
Diagnosis and Testing - Gasoline
130
Fuel Pressure Check
130
General Service Procedures
131
Fuel Pressure Relief
131
Spring Lock Coupling - Type I - Disconnect
131
Spring Lock Coupling - Type I - Connect
131
Spring Lock Coupling - Type II - Connect
132
Spring Lock Coupling - Type II - Disconnect
132
Quick Connect Coupling - Type I - Connect
133
Quick Connect Coupling - Type II - Connect
134
Fuel Rail & Injectors - Replacement
135
Removal and Installation
136
Actuator - Removal
136
Actuator - Installation
136
Section 4
138
Diagnosis and Testing
142
Coolant Inspection
142
Coolant Range Check
142
Drive Belt Inspection
143
Cooling System Pressure Test
145
Radiator Cap Pressure Test
145
Thermostat Operational Check
145
General Service Procedures
146
Draining the Cooling System
146
Filling the Cooling System
146
Flushing the Cooling System
146
Removal and Installation
147
Belt Tensioner - Replacement
147
Drive Belt - Installation
147
Drive Belt - Removal
147
Idler Pulley - Replacement
147
Radiator Hose - Installation
148
Thermostat & Housing - Replacement
149
Radiator Hose - Removal
148
Coolant Pump - Replacement
150
Block Heater - Replacement
151
Outlet Pipe - Replacement
151
Coolant Bypass - Replacement
152
Section 5
154
Default Chapter
157
Wiring Diagram
157
Diagnosis and Testing
158
Preliminary Checks
158
Warning Indicator Check
158
Battery Drain Test
160
Battery Load Test
160
Generator Output Test
161
Generator Voltage Test
161
General Service Procedures
162
Battery Cleaning and Inspection
162
Battery Tools
162
Removal and Installation
164
Generator - Replacement
164
Voltage Regulator - Replacement
164
Generator Pulley - Replacement
165
Battery - Installation
166
Dsg-423 Starter Index Subject Page
168
Motor Feed Circuit - Voltage Drop Test
174
Starter Motor - Ground Circuit Check
174
Jump Starting
175
Starter Motor - Replacement
176
Subject Page
178
General Information
179
Battery - Removal
166
GCP and Sensors
179
Fuel System Components - Gasoline
185
Coil-On-Plug Ignition
186
Adaptive Learn
187
Electrostatic Discharge Damage
187
GCP Service Precautions
187
Open Loop and Closed Loop Operation
187
Use of Circuit Testing Tools
187
Diagrams and Schematics
188
Engine Component Locator View
200
Diagnosis and Testing
201
Diagnostic Approach
201
GCP Diagnostic Overview
201
On-Board Diagnostics - GCP
201
Engine Control Module (GCP) Limp Home Mode Strategy
201
Intermittent MIL
202
Malfunction Indicator Lamp (MIL) DTC Retrieval Procedure
202
Diagnosis Using a Personal Computer
203
Visual Inspection
213
Intermittent Problems
213
Symptom Charts
214
Engine Control Module (GCP) - Diagnostic Trouble Codes
217
Removal and Installation
220
Camshaft Position (CMP) Sensor - Replacement
220
Crankshaft Position (CKP) Sensor - Removal
220
Crankshaft Position (CKP) Sensor - Installation
221
Cylinder Head Temperature (CHT) Sensor - Replacement
222
Engine Coolant Temperature (ECT) Sensor - Replacement
222
Heated Oxygen Sensor (HO2S) - Replacement
222
Knock Sensor (KS) - Replacement
223
Temperature Manifold Absolute Pressure (TMAP) Sensor - Replacement
223
Actuator/Throttle Position (TP) Sensor - Replacement
223
Nomenclature for Bolts
226
Bolt Strength Identification
227
Hex Nut Strength Identification
227
Dsg-423 Metrics
228
Other Types of Parts
228
English/Metric Conversion
229
J1930 Terminology List
231
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Engine distributors DSG-423 Specifications
General
Brand
Engine distributors
Model
DSG-423
Category
Engine
Language
English
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