FI SYSTEM DIAGNOSIS 4-45
“21” (P0110-H/L) IAT SENSOR CIRCUIT MALFUNCTION
INSPECTION
NOTE:
After repairing the trouble, clear the DTC using SDS tool.
(
4-24)
Step 1 (When indicating 21:)
1) Turn the ignition switch OFF.
2) Remove the fuel tank. (
5-3)
3) Check the IAT sensor coupler for loose or poor contacts.
If OK, then measure the IAT sensor voltage at the wire side
coupler.
DETECTED CONDITION
POSSIBLE CAUSE
21
Output voltage is not within the following
range.
0.15 V
Sensor voltage < 4.85 V
• IAT sensor circuit open or short
• IAT sensor malfunction
• ECM malfunction
P0110
H
Sensor voltage is higher than specified
value.
• IAT sensor circuit open or ground circuit open
• IAT sensor circuit shorted to ground
L
Sensor voltage is lower than specified
value.
ECM
E2
IAT
B/Br
Y/R
IAT sensor
When using the multi circuit tester, do not strongly touch the terminal of the ECM coupler with
a needle-point probe to prevent the terminal damage or terminal bend.
1
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