Suzuki TU250X Service Manual page 168

Step 1 (When indicating P0110-L:)
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 check the IAT sensor lead wire continuity.
4) Disconnect the IAT sensor coupler.
5) Check the continuity between Y/R wire and ground. If the
sound is not heard from the tester, the circuit condition is OK.
 Tester knob indication: Continuity test ()
6) Connect the IAT sensor coupler and turn the ignition switch
ON.
7) Measure the voltage between Y/R wire and ground.
 IAT sensor output voltage: 0.15 – 4.84 V
 09900-25008: Multi circuit tester set
09900-25009: Needle-point probe set
 Tester knob indication: Voltage ()
Are the continuity and voltage OK?
YES Go to Step 2.
• Y/R wire shorted to ground
NO
• If wire is OK, go to Step 2.
(+ Y/R – - Ground)
FI SYSTEM DIAGNOSIS 4-47
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