Suzuki FL125S Service Manual page 335

"21" (P0110-H/L) IAT SENSOR CIRCUIT MALFUNCTION
DETECTED CONDITION
21 Output voltage is not within the following
value.
0.1 Sensor voltage
P0110 Sensor voltage is higher than specified
H
value.
Sensor voltage is lower than specified
L
value.
IAT sensor
NOTE:
IAT sensor is incorporated in the IAP sensor/TP sensor.
INSPECTION
Step 1 (When indicating 21:)
1) Turn the ignition switch OFF.
2) Remove the right leg shield. (#5-6)
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 and turn the ignition switch
ON.
5) Measure the voltage between Dg wire A and ground.
6) Also, measure the voltage between Dg wire A and Br/B wire B.
! IAT sensor input voltage: 4.5 – 5.5 V
$ 09900-25008: Multi-circuit tester set
09900-25009: Needle pointed probe set
' Tester knob indication: Voltage (()
Is the voltage OK?
YES Go to Step 2.
• Loose or poor contacts on the ECM coupler
(Terminal L or 4).
NO
• Open or short circuit in the Dg wire or Br/B wire.
• IAT sensor circuit open or short.
• IAT sensor malfunction.
4.6 V • ECM malfunction.
• IAT sensor circuit open or ground circuit open.
• IAT sensor circuit shorted to ground.
Dg
Br/B
(+ Dg – - Ground)
(+ Dg – - Br/B)
POSSIBLE CAUSE
ECM
IAT
E2
1
1
FL125SDW 8-60
V