Suzuki TU250X Service Manual page 158

3) Disconnect the TP sensor coupler.
4) Turn the ignition switch ON.
5) Measure the voltage at the R wire and ground.
6) If OK, then measure the voltage at the R wire and B/Br wire.
 TP sensor input 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
(terminal A or T).
NO
• Open or short circuit in the R wire or B/Br wire.
Step 1 (When indicating P0120-H:)
1) Turn the ignition switch OFF.
2) Check the TP sensor coupler for loose or poor contacts.
If OK, then check the TP sensor lead wire continuity.
3) Disconnect the TP sensor coupler.
4) Check the continuity between V wire A and R wire B.
If the sound is not heard from the tester, the circuit condition
is OK.
(+ R – - Ground)
(+ R – - B/Br)
FI SYSTEM DIAGNOSIS 4-37
1
V