FI SYSTEM DIAGNOSIS 12-39
“17” (P0105-H/L) IAP SENSOR CIRCUIT MALFUNCTION
NOTE:
After repairing the trouble, clear the DTC using SDS tool. (
12-21)
INSPECTION
Step 1 (When indicating 17:)
1) Stop the engine.
2) Check the IAP sensor coupler
1
for loose or poor contacts.
If OK, then measure the IAP sensor input voltage.
3) Disconnect the IAP sensor coupler
1
.
DETECTED CONDITION
POSSIBLE CAUSE
17
IAP sensor voltage is not within the fol-
lowing range.
0.23 V
Sensor voltage < 4.11 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
VCC
IAP
E2
IAP sensor
B/Br
R/Bl
G/B
When using the multi circuit tester, do not strongly touch the terminal of the ECM coupler with
a needle-pointed tester probe to prevent the terminal damage or terminal bend.
1
