Suzuki GSX1300BK B-King Service Manual page 116

P0120-L (Use of SDS)
Step
1 1) Turn the ignition switch OFF.
2) Lift and support the fuel tank. Refer to "Fuel Tank
Removal and Installation in Section 1G (Page 1G-10)".
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 the P/B wire and ground.
Also, check the continuity between the P/B wire and B/Br
wire.
If the sound is not heard from the tester, the circuit
condition is OK.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
Tester knob indication
Continuity test (
Action
1
I823H1110115-01
)
I823H1110029-03
Engine General Information and Diagnosis:
Yes
Go to Step 2.
(A)
1A-45
No
R and P/B wire open, or
P/B wire shorted to the
ground.