C13" (P0105-H/L) Iap Sensor Circuit Malfunction - Suzuki GSX-R750 Service Manual

4-38 FI SYSTEM DIAGNOSIS

"C13" (P0105-H/L) IAP SENSOR CIRCUIT MALFUNCTION

DETECTED CONDITION
C13 IAP sensor voltage is not within the fol-
lowing range.
0.5 V Sensor voltage < 4.85 V
NOTE:
Note that atmospheric pressure varies
depending on weather conditions as
well as altitude.
Take that into consideration when
inspecting voltage.
P0105 Sensor voltage is higher than specified
H
value.
Sensor voltage is lower than specified
L
value.
IAP sensor
INSPECTION
Step 1 (When indicating C13:)
1) Turn the ignition switch OFF.
2) Lift and support the fuel tank. (5-3)
3) Check the IAP sensor coupler for loose or poor contacts.
If OK, then measure the IAP sensor input voltage.
POSSIBLE CAUSE
• Clogged vacuum passage between throttle body
and IAP sensor.
• Air being drawn from vacuum passage between
throttle body and IAP sensor.
• IAP sensor circuit open or shorted to ground.
• IAP sensor malfunction.
• ECM malfunction.
• IAP sensor circuit open or shorted to VCC or
ground circuit open.
• IAP sensor circuit shorted to ground or VCC cir-
cuit open.
G/B
B/Br
R
1
ECM
IAP
E2
VCC