Suzuki GSF1250 Service Manual page 147

C29 (Use of mode select switch)
Step
1 1) Turn the ignition switch OFF.
2) Check the STP sensor coupler for loose or poor
contacts.
If OK, then measure the STP sensor input voltage.
3) Disconnect the STP sensor coupler.
4) Turn the ignition switch ON.
5) Measure the voltage at the R wire and ground. Also,
measure the voltage at the R wire and B/Br wire.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
Tester knob indication
Voltage ( )
STP sensor input voltage
4.5 – 5.5 V
((+) terminal: R – (–) terminal: Ground, (+) terminal: R
– (–) terminal: B/Br)
Is the voltage OK?
Action
I718H1110253-01
(A)
I718H1110197-02
Engine General Information and Diagnosis:
Yes
Go to Step 4.
1A-78
No
• Loose or poor
contacts on the ECM
coupler.
• Open or short circuit
in the R wire or B/Br
wire.