Suzuki ltz 400 Service Manual page 113

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Step
4
1) Turn the ignition switch OFF.
2) Remove the IAP sensor. Refer to "IAP Sensor Removal
and Installation in Section 1C (Page 1C-2)".
3) Connect the vacuum pump gauge to the vacuum port of
the IAP sensor.
Arrange 3 new 1.5 V batteries in series (1) (check that
total voltage is 4.5 – 5.5 V) and connect (–) terminal to
the ground terminal "B" and (+) terminal to the VCC
terminal "A".
4) Check the voltage between Vout "C" and ground. Also,
check if voltage reduces when vacuum is applied up to
400 mmHg by using vacuum pump gauge.
Special tool
(A): 09917–47011 (Vacuum pump gauge)
(B): 09900–25008 (Multi-circuit tester set)
Tester knob indication
Voltage (
)
ALTITUDE (Reference)
ft
0 – 2 000
2 001 – 5 000
611 – 1 524
5 001 – 8 000
1 525 – 2 438
8 001 – 10 000
2 439 – 3 048
Is the voltage OK?
Action
"B"
"C"
"A"
v
1
(B)
ATOMOSPHERIC
PRESSURE
m
mmHg
kPa
0 – 610
760 – 707
100 – 94
707 – 634
94 – 85
634 – 567
85 – 76
567 – 526
76 – 70
Engine General Information and Diagnosis:
Yes
• G/B, R or B/Br wire
open or shorted to
ground, or poor "6",
"13" or "24"
connection.
• If wire and
connection are OK,
intermittent trouble or
faulty ECM.
• Recheck each
terminal and wire
harness for open
circuit and poor
connection.
• Replace the ECM
with a known good
one, and inspect it
again. Refer to "ECM
Removal and
Installation in Section
1C (Page 1C-2)".
(A)
I933H1110025-01
OUTPUT
VOLTAGE
V
3.1 – 3.6
2.8 – 3.4
2.6 – 3.1
2.4 – 2.9
I831G1110033-01
1A-46
No
If check result is not
satisfactory, replace IAP
sensor with a new one.
Refer to "IAP Sensor
Removal and
Installation in Section
1C (Page 1C-2)".

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