Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Service 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.
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