Suzuki TU250X User Manual

FI SYSTEM DIAGNOSIS 4-45
“21” (P0110-H/L) IAT SENSOR CIRCUIT MALFUNCTION

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.
DETECTED CONDITION POSSIBLE CAUSE
21 Output voltage is not within the following
range.
0.15 V Sensor voltage < 4.85 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
E2
IAT
B/Br
Y/R
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.
1

Suzuki TU250X Specifications

General

Displacement	249 cc
Bore x Stroke	72.0 mm x 61.2 mm
Compression Ratio	9.2:1
Ignition	Electronic ignition (transistorized)
Starter	Electric
Transmission	5-speed constant mesh
Final Drive	Chain
Front Suspension	Telescopic, coil spring, oil damped
Rear Suspension	Swingarm type, coil spring, oil damped
Rear Brakes	Drum brake
Front Tire	90/90-18 M/C 51S, tube type
Rear Tire	110/90-18 M/C 61S, tube type
Overall Length	2070 mm (81.5 in.)
Overall Width	750 mm (29.5 in.)
Overall Height	1075 mm (42.3 in.)
Seat Height	770 mm (30.3 in.)
Ground Clearance	165 mm (6.5 in.)
Wheelbase	1375 mm (54.1 in.)
Curb Weight	148 kg (326 lbs.)
Engine Type	4-stroke, single cylinder, SOHC
Front Brakes	Single disc
Fuel Capacity	12 L (3.2 US gal.)