21" (P0110-H/L) Iat Sensor Circuit Malfunction - Suzuki TU250X Service Manual

"21" (P0110-H/L) IAT SENSOR CIRCUIT MALFUNCTION

DETECTED CONDITION
21 Output voltage is not within the following
range.
0.15 V
P0110 Sensor voltage is higher than specified
H
value.
Sensor voltage is lower than specified
L
value.
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.
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.
Sensor voltage < 4.85 V
POSSIBLE CAUSE
• IAT sensor circuit open or short
• IAT sensor malfunction
• ECM malfunction
• IAT sensor circuit open or ground circuit open
• IAT sensor circuit shorted to ground
Y/R
B/Br
1
FI SYSTEM DIAGNOSIS 4-45
ECM
IAT
E2