For Diesel Engine Model; Repair Instructions; Egr Valve Inspection - Suzuki Grand Vitara 2011 Manual

For Diesel Engine Model

EGR Valve Inspection

CAUTION
!
Do not disassemble EGR valve, or original
performance will be spoiled.
1) Check EGR valve for the following.
If malfunction is found, replace EGR valve.
• Check EGR valve for wear and damage.
• Check EGR valve operates smoothly by opening
EGR valve fully by hand.
2) Check resistance of EGR valve as follows.
If malfunction is found, replace EGR valve.
a) Check resistances between the following EGR
valve terminals respectively.
EGR valve resistance
Terminal
3.9 – 12.6 kΩ at 20 °C (68 °F)
Between 2 and 4
3.9 – 12.6 kΩ at 20 °C (68 °F)
Between 2 and 6
b) Check resistance between terminals 2 and 6 is
decreased linearly when opening EGR valve
fully from close position.
3) Check EGR valve operation by ECM signal as
follows.
a) Turn ignition switch to OFF position.
b) Connect EGR valve connector (1) to EGR valve
(2).
c) Turn ignition switch to ON position.
d) Check EGR valve opens and closes each
approx. 10 times repeatedly and automatically
after turning ignition switch to OFF position.
Aux. Emission Control Devices: For Diesel Engine Model 1B-7

Repair Instructions

S6JB0A1226006
I6JB0A122001-01
Resistance
5
6
4
2
1
I6JB0A122002-01
If EGR valve does not operate at all, go to next
step.
If EGR valve operates correctly, EGR valve is in
good condition.
4) Check pulse signal for EGR valve as follows.
a) Disconnect EGR valve connector.
b) Turn ignition switch to ON position.
c) Measure operating pulse signal between
terminal "1" and terminal "5" of EGR valve
connector using oscilloscope after turning
ignition switch to OFF position.
If pulse signal shown in figure can be measured,
replace EGR valve.
If not, check connection and wiring harness
between EGR valve and ECM.
[A]: EGR valve connector (viewed from harness side)
1
I6JB0A122003-01
I6JB0A122004-02