ISUZU 4HL1 Engine Control System Manuals

Manuals and User Guides for ISUZU 4HL1 Engine Control System. We have 1 ISUZU 4HL1 Engine Control System manual available for free PDF download: Workshop Manual

ISUZU 4HL1 Workshop Manual

ISUZU 4HL1 Workshop Manual (268 pages)

ENGINE CONTROL SYSTEM

Brand: ISUZU | Category: Control Systems | Size: 5 MB

Table of Contents

Table of Contents
3
Engine
3
Engine Control System
3
Engine Control System
4
Precautions on Service
4
- ECM Description
  5
- Function of ECM
  5
- Electronic Control System
  5
Function and Operation
5
- Calculation of Desired Injection Quantity
  7
- Injector Control
  7
- SCV Control (Pump Control)
  7
- Intake Throttle Control
  8
- EGR Control
  9
- Idle Stop Control Working Conditions
  10
- Exhaust Brake Control
  10
- QWS Working Conditions
  10
- QWS Control
  10
- Component Layout - Vehicle Side
  11
Powertrain System Components
11
- Component Layout - Engine Side
  12
- ECT Sensor
  12
- EGR Valve and EGR Valve Position Sensor
  13
- Intake Throttle Valve and ITP Sensor
  13
- CMP Sensor
  13
- CKP Sensor
  14
- Scv
  14
- FT Sensor
  14
- Common Rail Pressure Sensor
  14
- AP Sensor
  15
- Clutch Switch
  15
- Idle Position Switch
  15
- IAT Sensor
  15
- Atmospheric Pressure Sensor
  16
- VS Sensor
  16
- Neutral Switch
  16
- Exhaust Brake Solenoid Valve
  16
- VIM
  17
- CHECK ENGINE Lamp (MIL)
  17
- Dlc
  17
- Fuse Layout
  18
- Spare Fuse
  18
- Relay Layout
  20
- ECM Circuit Diagram
  22
- VIM Circuit Diagram
  23
- ECM/VIM Circuit Diagram
  24
- Connector List
  31
- ECM Pinouts
  35
- H-8
  35
- H-7
  35
- 81-Way Connector (Engine Side)
  36
- 40-Way Connector (Vehicle Side)
  37
- VIM Pinouts
  38
- 26-Way Connector
  39
- 16-Way Connector
  39
- 12-Way Connector
  40
- 22-Way Connector
  40
- Strategy-Based System Diagnostics
  40
Strategy-Based Diagnostics
40
- DTC Stored
  41
- No DTC
  41
- No Matching Symptom
  41
- Intermittents
  41
- Non-OEM Parts
  42
- Poor Vehicle Maintenance
  42
- Visual/Physical Engine Compartment Inspection
  42
- Basic Knowledge of Tools Required
  42
- Diagnostic Executive
  43
- Diagnostic Information
  43
- Input Components
  43
- Comprehensive Component Monitor Diagnostic Operation
  43
- Verifying Vehicle Repair
  44
- Diagnostic Trouble Code (DTC)
  44
- Reading Diagnostic Trouble Codes
  44
- Diagnostic Trouble Codes Not Stored
  44
- Diagnostic Trouble Codes Stored
  45
- Clearing Diagnostic Trouble Codes
  45
- ECM Voltage and Continuity Test/Measurement
  46
- Key Points on Hearing
  46
Functional Check List
46
Hearing Diagnostic
46
- Engine Control System Diagnostic Chart
  47
- Circuit Description
  49
- Diagnostic Aids
  49
- Test Description
  49
On-Board Diagnostic (OBD) System Check . 1A-47
49
Inactive CHECK ENGINE Lamp Check
52
Unblinking CHECK ENGINE Lamp Check
56
Diagnosis with Tech 2 Scan Tool
61
- Data Display
  64
- Snapshot
  64
- Diagnostic Trouble Codes
  64
- Menu Breakdown
  64
- Replaying Recorded Data Graph
  65
- Snapshot after Data Indication
  65
- Snapshot after Determination of Trigger Type
  65
- Actuator Test
  66
- ECM Date
  69
- ECM Data
  78
Diagnostic Chart
90
DTC14 - CMP Sensor System Fault
95
Conditions for Clearing MIL/DTC
99
DTC15 - CKP Sensor System Fault
99
DTC18 - Starter Degradation (for Only Vehicles Equipped with Idle Stop Function)
103
DTC22 - IAT Sensor System Fault
105
Characteristics of IAT Sensor (Reference)
108
DTC23 - ECT Sensor System Fault
109
DTC24 - Accelerator Sensor System Fault
114
Fault
115
- DTC25 - Vehicle Speed Sensor System Fault
  118
- DTC28 - PTO Accelerator Sensor System Fault
  122
DTC31 - Idle up Volume System Fault
125
Idle up Volume Switch Description
128
DTC33 - VIM Internal Fault (EEPROM Write Error)
129
DTC34 - ECM Internal Fault (Charge Circuit Fault)
131
Fault)
132
DTC35 - VIM Internal Fault (A/D Conversion Fault)
134
DTC43 - ITP Sensor System Fault
136
Intake Throttle Valve Description
140
DTC44 - EGR Valve Position Sensor System Fault
141
DTC45 - EGR Valve System Fault
146
DTC46 - Exhaust Brake System Fault
149
DTC51 - ECM Internal Fault (CPU Error / CPU History Error)
152
DTC52 - ECM Internal Fault (Sub CPU Error)
154
- DTC61 - Intake Throttle Valve System Fault
  156
- DTC71 - Barometric Pressure Sensor Fault
  159
DTC81 - Clutch Switch System Fault
161
DTC82 - Neutral Switch System Fault
165
DTC84 - CAN Communication Fault (CAN Bus Error)
168
- Go to Step
  169
DTC86 - CAN Communication Fault (CAN Timeout Error)
171
- Go to Step
  172
DTC115 - Common Rail Pressure Sensor Fixed Output Fault
174
Wiring Harness Repair: Shielded Cable
259
- Removal Procedure
  259
- Installation Procedure
  259
Twisted Leads
260
- Removal Procedure
  260
- Installation Procedure
  260
Weather-Pack Connector
262
- Removal Procedure
  262
- Installation Procedure
  262
- Special Tools
  263
Com-Pack III
264
- General Information
  264
Metri-Pack
265
- Removal Procedure
  265
- Installation Procedure
  265
- Special Tools
  265

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