Suzuki Intruder VZ1500 Service Manual page 130

1A-63 Engine General Information and Diagnosis:
C29 (Use of mode select switch)
Step
1 1) Turn the ignition switch OFF.
2) Remove the fuel tank. Refer to "Fuel Tank Removal and
Installation in Section 1G (Page 1G-9)".
3) Remove the right air cleaner box. Refer to "Air Cleaner
Element Removal and Installation in Section 1D
(Page 1D-6)".
4) Check the STP sensor coupler (1) for loose or poor
contacts.
If OK, then measure the STP sensor input voltage.
5) Disconnect the STP sensor coupler.
6) Turn the ignition switch ON.
7) Measure the input voltage between the R wire "A" and
ground.
Also, measure the voltage between the R wire "A" and B/
Br wire "B".
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)
"B"
Is the voltage OK?
Action
1
"A"
Yes
Go to Step 2.
I940H1110052-01
(A)
I822H1110064-01
No
• Loose or poor
contacts on the ECM
coupler.
• Open or short circuit
in the R wire or B/Br
wire.