Denso CRS - Page 3

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Revision History

Date Revision Contents

2007. 09 • SCV: Explanation of compact SCV added to "Suction Control Valve (SCV)". (Operation: Refer

to page 1-30.)

• "Repair" section added.

Main Page

Table of Contents4
General Description6
Changes in Environment Surrounding the Diesel Engine6
Demands on Fuel Injection System7
Types of and Transitions in ECD (ELECTRONICALLY CONTROLLED DIESEL) Systems8
Common Rail System Characteristics9
Common Rail System and Supply Pump Transitions10
Injector Transitions10
Common Rail System Configuration11
Common Rail System Outline12
Layout of Main Components12
Supply Pump Description17
HP0 Type17
HP2 Type23
HP3 Type32
HP4 Type46
Rail Desccription51
Rail Functions and Composition51
Component Part Construction and Operation51
Injector Description55
General Description55
Injector Construction and Features56
Injector Operation59
Injector Actuation Circuit60
Other Injector Component Parts61
Description of Control System Components64
Engine Control System Diagram (Reference)64
Engine ECU (Electronic Control Unit)65
EDU (Electronic Driving Unit)65
Various Sensors66
Control System71
Fuel Injection Control71
E-EGR System (Electric-Exhaust Gas Recirculation)81
Electronically Controlled Throttle (Not Made by DENSO)83
Exhaust Gas Control System84
DPF System (Diesel Particulate Filter)85
DPNR SYSTEM (DIESEL PARTICULATE Nox REDUCTION)87
Diagnosis88
Outline of the Diagnostic Function88
Diagnosis Inspection Using DST-188
Diagnosis Inspection Using the MIL (Malfunction Indicator Light)89
Throttle Body Function Inspection91
End of Volume Materials92
Particulate Matter (PM)92
Common Rail Type Fuel Injection System Development History and the World's Manufacturers92
Higher Injection Pressure, Optimized Injection Rates, Higher Injection Timing Control Precision, Higher Injection Quantity Control Precision93
Image of Combustion Chamber Interior95
Repair Section96
Diesel Engine Malfunctions and Diagnostic Methods (Basic Knowl- Edge)96
Combustion State and Malfunction Cause96
Troubleshooting97
Diagnosis Overview98
Diagnostic Work Flow98
Inquiries99
Non-Reoccurring Malfunctions101
Dtc Reading (for Toyota Vehicles)103
DTC Check (Code Reading Via the DST-2)103
DTC Memory Erasure (Via the DST-2)103
Troubleshooting by System104
Intake System Diagnosis104
Fuel System Diagnosis104
Basics of Electrical/Electronic Circuit Checks107
Troubleshooting112
Troubleshooting According to Malfunction Symptom (for TOYOTA Vehicles)112
Other Malfunction Symptoms127
Diagnosis Codes (Dtc)129
DTC Chart (Example)129

Denso CRS - Page 3

Table of Contents

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