21" (P0110-H/L) Iat Sensor Circuit Malfunction - Suzuki RM-Z250 Service Manual

12-44 FI SYSTEM DIAGNOSIS

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

DETECTED CONDITION
Output voltage is not within the following
21 range.
0.19 V
Sensor voltage is higher than specified
H
value.
P0110
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-pointed tester probe to prevent the terminal damage or terminal bend.
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)
Sensor voltage < 4.93 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.
Dg
B/Br
1
ECM
IAT
E2