Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 614

EXHAUST GAS RECIRCULATION (EGR) SYSTEM 6E– 1

SECTION 6E

EXHAUST GAS RECIRCULATION (EGR) SYSTEM

TABLE OF CONTENTS

PAGE

General Description. . . . . . . . . . . . . . . . . . . . . . . . . . ... 6E -2

EGR System Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . 6E -4
EGR System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 6E -4

Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... 6E -5
EGR Cooler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6E -6

INDEX

6E – 2 EXHAUST GAS RECIRCULATION (EGR) SYSTEM

GENERAL DESCRIPTION

Except 4JA1TC Engine

EXHAUST GAS RECIRCULATION (EGR) SYSTEM 6E– 3

C06H200001

This system controls the formation of NOx emission by recirculating the exhaust gas into the combustion chamber
through the intake maniflld.
The two EGR values are controlled by tow VSV controlled by EGR controller according to signals from various
snsors.
The amount of EGR depends on the number of engine rotations and the opening of the accelerator. Also, EGR may
fail to operate at some water temperature ranges of the engine.
The 4JA1TC engines is intercooler and EGR cooler equipped.

4JA1TC

6E – 4 EXHAUST GAS RECIRCULATION (EGR) SYSTEM

EGR SYSTEM DIAGRAM (Except 4JA1TC Engine)

EGR SYSTEM OPERATION

Inspect EGR valve motion visually while changing engine RPM under no load condition after warming-up.

• Inspection point (Engine RPM)

RPM Idling

2000

2750

3250

Engine Front Side VSV-1

ON

ON

ON

OFF

Engine Rear Side VSV-2

ON

ON

OFF

OFF

ON means VSV should receive signal to move EGR valve.
OFF means VSV shouldn’t receive signal to move EGR valve.