Diesel Injection Pump - Service Manual - New Common Rail System (HP3) - for MAZDA

Oct 28, 2026

Diesel injection pump service manual covering the New Common Rail System (HP3) for MAZDA. The Operation section explains product application for Mazda 5 and Mazda 6, highlighting additions such as the DPF system and injectors with QR codes. It provides system outlines and composition, details key components like supply pump, rail, injector, and control units, and includes structured references to diagnostics, including diagnostic trouble codes (DTC) and external wiring diagrams for specific model names.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages45

Reading Time1 h 53 min

AccessFree to download

PRODUCT APPLICATION INFORMATION

Outline

Application

System Components Parts Number

OUTLINE OF SYSTEM

Outline of Composition and Operation

SUPPLY PUMP

Outline

Explode View

SCV (Suction Control Valve)

RAIL

Outline

INJECTOR

Outline

Characteristics

Construction

QR Codes

OPERATION OF CONTROL SYSTEM COMPONENTS

Outline

Engine ECU (Electronic Control Unit)

Operation of Sensors

CONTROL SYSTEM

Outline

Fuel Injection Timing Control

DIAGNOSTIC TROUBLE CODES (DTC)

About the Codes Shown in the Table

Diagnostic Trouble Code Details

EXTERNAL WIRING DIAGRAM

Engine ECU External Wiring Diagram (Model Name: MAZDA 5)

Engine ECU External Wiring Diagram (Model Name: MAZDA 6)

Diesel Injection Pump SERVICE MANUAL New Common Rail System (HP3) for MAZDA OPERATION June, 2005 00400517E © 2005 DENSO CORPORATION All Rights Reserved. This book may not be reproduced or copied, in whole or in part, without the written permission of the publisher. Table of Contents | Operation Section | Table of Contens | | --- | --- | 1. PRODUCT APPLICATION INFORMATION 1.1 Outline ................................................................................ 1-1 1.2 Application ............................................................................. 1-1 1.3 System Components Parts Number ......................................................... 1-1 2. OUTLINE OF SYSTEM 2.1 Outline of Composition and Operation ....................................................... 1-3 3. SUPPLY PUMP 3.1 Outline ................................................................................ 1-4 3.2 Explode View ........................................................................... 1-4 3.3 SCV (Suction Control Valve) ............................................................... 1-5 4. RAIL 4.1 Outline ................................................................................ 1-7 5. INJECTOR 5.1 Outline ................................................................................ 1-8 5.2 Characteristics .......................................................................... 1-8 5.3 Construction ........................................................................... 1-8 5.4 QR Codes ............................................................................. 1-9 6. OPERATION OF CONTROL SYSTEM COMPONENTS 6.1 Outline ............................................................................... 1-11 6.2 Engine ECU (Electronic Control Unit) ....................................................... 1-11 6.3 Operation of Sensors.................................................................... 1-12 7. CONTROL SYSTEM 7.1 Outline ............................................................................... 1-14 7.2 Fuel Injection Timing Control .............................................................. 1-16 8. DIAGNOSTIC TROUBLE CODES (DTC) 8.1 About the Codes Shown in the Table ....................................................... 1-17 8.2 Diagnostic Trouble Code Details ........................................................... 1-17 9. EXTERNAL WIRING DIAGRAM 9.1 Engine ECU External Wiring Diagram (Model Name: MAZDA 5) .................................. 1-33 9.2 Engine ECU External Wiring Diagram (Model Name: MAZDA 6) .................................. 1-37 1–1 Operation Section 1. PRODUCT APPLICATION INFORMATION 1.1 Outline z The common rail system for the MZR-CD engine has been newly installed in the Mazda 5 and Mazda 6. The contents for the common rail system are basically the same as those published in the previous Service Bulletin, "S/B Code: ECD02-06, Subject: New Common Rail System (ECD-U2P) for Mazda." The two major points that have changed for this system are the addition ofthe DPF system, and injectors equipped with the QR code. Please be sure to use this Service Manual together with the Service Bulletin as this edition explains only points that have changed. 1.2 Application | Model Name | Engine | Destination | Line Off Period | | --- | --- | --- | --- | | | | | | | MAZDA 5 | MZR-CD | Europe | March, 2005 | | MAZDA 6 | | | April, 2005 | 1.3 System Components Parts Number | Parts Name | DENSO P/N | Manufacturer P/N | Remarks | | --- | --- | --- | --- | | | | | | | Engine ECU | 275800-6401 | RF7J 18 881B | MAZDA 6 | | | 275800-6441 | RF7K 18 881B | MAZDA 6 High Output Engine | | | 275800-6450 | RF7N 18 881A | MAZDA 5 | | | 275800-6460 | RF7P 18 881A | MAZDA 5 High Output Engine | | Turbo pressure sensor (MAPS) | 079800-7440 | RF7J 18 211 | | | Injector | 095000-5780 | RF7J 13 H50 | | | C

FAQs

What engine and vehicle models does this manual’s New Common Rail System (HP3) cover?

It covers the common rail system for the MZR-CD engine installed in Mazda 5 and Mazda 6.

What major changes distinguish this HP3 system from the earlier service bulletin?

Two major points are added: the DPF system and injectors equipped with QR codes.

Where can diagnostic trouble code (DTC) information be found in the manual?

The manual includes a dedicated DTC section with an explanation of code tables and details for each diagnostic trouble code.

Oct 28, 2026

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