Suzuki 2009 LT-A500XP, Service Manual

Page: 103 / 624

Engine General Information and Diagnosis: 1A-32
3 1) Turn the ignition switch OFF.
2) Connect the IAP sensor coupler.
3) Insert the needle pointed probes to the lead wire coupler.
4) Starter the engine at idle speed and measure the IAP
sensor output voltage at the wire side coupler between
G/B wire and B/Br wire.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
(B): 09900–25009 (Needle pointed probe set)
Tester knob indication
Voltage (
)
IAP sensor output voltage
1.78 – 3.35 V at idle speed
((+) terminal: G/Bl – (–) terminal: B/Br)
Is the voltage OK?
• 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”
.
If check result is not
satisfactory, replace IAP
sensor (throttle body)
with a new one. Refer to
“Throttle Body
Removal and
Installation: in Section
1D”
.
Step Action Yes No
(A)
(B)
I931H1110026-01