Suzuki TU250X Service Manual page 159

4-38 FI SYSTEM DIAGNOSIS
5) Disconnect the ECM coupler.
6) Check the continuity between V wire A and terminal 3.
7) Also, check the continuity between B/Br wire C and terminal
T.
 TP sensor lead wire continuity: Continuity ()
 09900-25008: Multi circuit tester set
09900-25009: Needle-point probe set
 Tester knob indication: Continuity test ()
Is the continuity OK?
YES Go to Step 2.
NO V wire shorted to VCC, or B/Br wire open
Step 1 (When indicating P0120-L:)
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 ground.
5) Also, check the continuity between V wire A and B/Br wire
C. If the sound is not heard from the tester, the circuit condi-
tion is OK.
1
ECM coupler (Harness side)
1
!