Suzuki VLR1800 Service Manual page 108

1A-39 Engine General Information and Diagnosis:
C14 (Use of mode select switch)
Step
1 1) Turn the ignition switch OFF.
2) Remove the right air cleaner box. Refer to "Air Cleaner
Element Removal and Installation in Section 1D
(Page 1D-6)".
3) Check the TP sensor coupler (1) for loose or poor
contacts.
If OK, then measure the TP sensor input voltage.
4) Disconnect the TP sensor coupler.
5) Turn the ignition switch ON.
6) Measure the input voltage between the R wire and
ground.
If OK, then measure the input voltage between the R
wire and B/Br wire.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
Tester knob indication
Voltage ( )
TP sensor input voltage
4.5 – 5.5 V
((+) terminal: R – (–) terminal: Ground, (+) terminal: R
– (–) terminal: B/Br)
Is the voltage OK?
Action
1
I822H1110026-01
(A)
V
I823H1110026-04
Yes
Go to Step 3.
No
• Loose or poor
contacts on the ECM
coupler.
• Open or short circuit
in the R or B/Br wire.