Suzuki VL800 Service Manual page 413

"C21" (P0110) IAT SENSOR CIRCUIT MALFUNCTION
DETECTED CONDITION
C21 Output voltage is not within the following
range.
0.1 Sensor voltage < 4.6 V
P0110 Sensor voltage is higher than specified
H
value.
Sensor voltage is lower than specified
L
value.
IAT sensor
INSPECTION
Step 1 (When indicating C21:)
1) Remove the air cleaner box. ($14-103)
2) Turn the ignition switch OFF.
3) Check the IAT sensor coupler for loose or poor contacts.
If OK, then measure the IAT sensor voltage at the wire side
coupler.
4) Disconnect the coupler and turn the ignition switch ON.
5) Measure the voltage between Dg wire terminal and ground.
6) Also, measure the voltage between Dg wire terminal and B/Br
wire terminal.
! IAT sensor voltage: 4.5 – 5.5 V
" 09900-25008: Multi-circuit tester set
& Tester knob indication: Voltage (')
Is the voltage OK?
YES Go to Step 2.
• Loose or poor contacts on the ECM coupler.
NO
• Open or short circuit in the Dg wire or B/Br wire.
(+ Dg – - Ground)
(+ Dg – - B/Br)
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
1
VL800K5 ('05-MODEL) 14-61
ECM
IAT
E2
V