Suzuki FL125S Service Manual page 327

4) Disconnect the TP sensor coupler.
5) Turn the ignition switch ON.
6) Measure the voltage at the R wire A and ground.
7) If OK, then measure the voltage at the R wire A and Br/B
wire B.
! 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 9 or 4).
NO
• Open or short circuit in the R wire or Br/B wire.
Step 1 (When indicating P0120-H:)
1) Turn the ignition switch OFF.
2) Remove the right leg shield. (#5-6)
3) Check the TP sensor coupler 1 for loose or poor contacts.
If OK, then check the TP sensor lead wire continuity.
4) Disconnect the TP sensor coupler.
5) Check the continuity between R wire A and P wire C.
If the sound is not heard from the tester, the circuit condition
is OK.
(+ R – - Ground)
(+ R – - Br/B)
1
V
1
1
FL125SDW 8-52