Suzuki GSF1250 Service Manual page 105

Step
5 1) Turn the ignition switch OFF.
2) Remove the IAP sensor (No.1). Refer to "IAP Sensor
(No.1) Removal and Installation in Section 1C (Page 1C-
2)".
3) Connect the vacuum pump gauge to the vacuum port of
the IAP sensor (No.1).
4) Arrange 3 new 1.5 V batteries in series (1) (check that
total voltage is 4.5 – 5.0 V) and connect (–) terminal to
the ground terminal "B" and (+) terminal to the Vcc
terminal "A".
5) Check the voltage between Vout terminal "C" and
ground. Also, check if voltage reduces when vacuum is
applied 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
"C"
"B"
"A"
(B)
1
ATOMOSPHERIC
PRESSURE
mmHg
m 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
• B, W/Bl or B/Br wire
open or shorted to
the ground, or poor
"11", "26" or "29"
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-1)".
(A)
I718H1110030-02
OUTPUT
VOLTAGE
V
3.4 – 4.0
3.0 – 3.7
2.6 – 3.4
2.4 – 3.1
I718H1110167-02
1A-36
No
If check result is not
satisfactory, replace the
IAP sensor (No.1) with a
new one. Refer to "IAP
Sensor (No.1) Removal
and Installation in
Section 1C (Page 1C-
2)".