12-44 FI SYSTEM DIAGNOSIS
“21” (P0110-H/L) IAT SENSOR CIRCUIT MALFUNCTION
NOTE:
After repairing the trouble, clear the DTC using SDS tool. (12-21)
INSPECTION
Step 1 (When indicating 21:)
1) Stop the engine.
2) Remove the seat and fuel tank rubber band. (5-2, 13-2)
3) Check the IAT sensor coupler 1 for loose or poor contacts.
If OK, then measure the IAT sensor voltage at the wire side
coupler.
4) Disconnect the IAT sensor coupler 1.
5) Connect a 12 volts battery by using the battery lead wire to
the service coupler. (12-19)
DETECTED CONDITION POSSIBLE CAUSE
21
Output voltage is not within the following
range.
0.19 V Sensor voltage < 4.93 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
B/Br
E2
IAT
Dg
IAT sensor
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
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