WORKSHOP MANUAL
C&E SERIES
ENGINE CONTROL SYSTEM
(6WF1-TC (EC GOVERNOR) model)
SECTION 6E
ISUZU
ISUZU
International Service & Parrs
NOTICE
Before using this Workshop Manual to assist you in performing
vehicle service and maintenance operations, it is recommended
that you carefully read and thoroughly understand the
information contained in Section OA under the headings
"GENERAL REPAIR INSTRUCTIONS" and "HOW TO USE THIS
MANUAL".
All material contained in this Manual is based on the latest
product information available at the time of publication.
All rights are reserved to make changes at any time without prior
notice.
Applicable Model:
C&E-Series
This manual is applicable to 2005 year model vehicles.
THIS MANUAL INCLUDES FOLLOWING SECTIONS:
SECTION
6E
CONTENTS
Engine Emission
How to read this Manual
This Engine Control System Troubleshooting Manual describes the inspection procedure for the engine control
system (an electronically controlled fuel injection system (common-rail)).
This manual will help you in correct and speedy service operation for the IE System.
Chapter 1 Overview of engine control system
•	Specification of engine control system
•	Control mechanism of engine control system
•	Input/output of engine control system
•	Sensor & actuator installing position of each engine
C	hapter 2 Failure diagnosis
•	View of diagnostic trouble codes
•	IE lamp does not light ON, or the diagnosis monitor displays no data
•	Contents of diagnostic trouble codes
Chapter 3 Function diagnosis
• Checking method for proper operation of IE System or its functions
Chapter 4 Checking procedure for each diagnostic trouble code
Chapter 5 Checking method for symptom (when no trouble code lights ON)
• When no diagnostic trouble code is displayed, hoe to know the position to be checked based
on the failure condition
Chapter 6	How to use engine control system inspection tools
• How to use the wiring harness for checking the wiring harness checker, Tech 2, and voltagee
Chapter 7	Others
• Check sheet of engine control system and simplified troubleshooting
Contents
Chapter 1 Overview of engine control
system
1.Overview and specifications of engine
control system.....................1-2
Overview of engine control system ..1-2
Specifications of engine control
system...........................1-2
EC Governor (Electrical Control
Governor)..........................1-3
TICS (Timing And Injection Control
System)............................1-4
Speed Limiter (SLD)................1-5
Auto Cruise........................1-6
External View Of Engine Control Unit
(ECU).............................1-9
Engine Control Unit
Input/Output List................1-10
2. Engine control system schematic
connection diagram................1-14
3.Control unit/sensor/switch installing
position..........................1-16
4.Other..............................1-22
Limp Home Control.................1-22
Confirmation Return Condition For
Emergency Engine Stop Lever.......1-23
Q. Adjustment Data................1-24
Chapter 2	Failure diagnosis
1.	Self-diagnosis of engine control
system.............................2-2
2.	Vehicle diagnostic procedure..2-16
Chapter 3	Functional diagnosis
Service Engine Soon Indicator Light
Does Not Turn On..................3-2
Service Engine Soon Indicator
Light Does Not Flash..............3-8
Tech 2 Inspection.................3-14
Starting System Inspection........3-18
Power Supply Circuit Inspection...3-22
Engine Control Unit (ECU) Ground
Circuit Inspection...............3-28
Fuel System Circuit Inspection....3-30
Intake System Inspection..........3-32
Exhaust System Inspection.........3-34
Parking Switch Inspection.........3-38
Power Take Off (PTO) Inspection ..3-42
Power Take Off (PTO)
Switch Inspection.................3-46
External Accelerator Inspection..3-50
Idle Speed Cannot Be Adjusted...3-54
Idle Speed Cannot Be Adjusted
Down...........................3-58
Chapter 4	Checking procedure for each
diagnostic trouble code............4-2
DTC-10 Rack Sensor Error........4-6
DTC-11 Governor Servo System
Error..........................4-10
DTC-14 Backup N Sensor Error ....4-16
DTC-15 N-TDC Sensor Error......4-24
DTC-211 Fuel Temperature Sensor
Error...........................4-32
DTC-22 Atmospheric Temperature
Sensor Error....................4-38
DTC-23 Water (Engine Coolant)
Temperature Sensor Error........4-44
DTC-24 Accelerator Pedal Position
Sensor Error....................4-52
DTC-241 Accelerator Position
Switch Off Error................4-60
DTC-242 Accelerator Position
Switch On Error.................4-66
DTC-25 Vehicle Speed Sensor
Error...........................4-72
DTC-29 Prestroke Servo System
Error...........................4-80
DTC-291 Prestroke Sensor Error...4-88
DTC-292 Prestroke Learning Error 4-94
DTC-32 Boost Sensor Error.....4-100
DTC-33 Memory Circuit (RAM)
Error.........................4-106
DTC-423 Prestroke Power Supply
Circuit Error..................4-108
DTC-518 EOL (End Of Line) Data
Error.........................4-114
DTC-543 Engine Over Run.......4-116
DTC-571 Engine Reversing Error 4-118
DTC-71 Atmospheric Pressure
Sensor Error..................4-120
Chapter 5	Checking method for symptom
Engine Dose Not Stop..............5-2
Engine Does Not Start.............5-4
Engine Stalling...................5-6
Engine Hunting...................5-10
Engine Hesitation, Poor Aspiration,
And Low Power Output.............5-12
White Exhaust Smoke..............5-16
Black Exhaust Smoke..............5-18
Contents
Chapter 6	How to use engine control
system inspection tools
Tech 2.........................6-2
Programming....................6-3
Chapter 7	Others
Abbreviation list.................7-2
Programming I Upload I Download
Fuel Delivery Rate Data........7-4
Chapter 1
Overview of engine control
system