12 LT-R450/ZK9 (’09-MODEL)
FI SYSTEM TROUBLESHOOTING
“C17” (P0105-H/L) IAP SENSOR CIRCUIT MALFUNCTION
INSPECTION
Step 1 (When indicating C17:)
1) Turn the ignition switch OFF.
2) Remove the engine mounting left upper bracket 1 by remov-
ing the bolts 2 and washers 3. (LT-R450K8 3-6)
DETECTED CONDITION POSSIBLE CAUSE
C17 IAP sensor voltage is not within the fol-
lowing range.
0.2 V Sensor voltage < 4.1 V
NOTE:
* Note that atmospheric pressure varies
depending on weather conditions as
well as altitude.
* Take that into consideration when
inspecting voltage.
• 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.
P0105
H
Sensor voltage is higher than specified
value.
• IAP sensor circuit shorted to VCC or ground cir-
cuit open.
• IAP sensor circuit open or shorted to ground or
VCC circuit open.
L
Sensor voltage is lower than specified
value.
ECM
B/Br
VCC
IAP
E2
IAP sensor
R
G/B
1
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