Suzuki VLR1800 Service Manual page 100

1A-31 Engine General Information and Diagnosis:
Troubleshooting
CAUTION
!
When using the multi-circuit tester, do not strongly touch the terminal of the ECM coupler with a
needle pointed tester probe to prevent terminal damage.
NOTE
After repairing the trouble, clear the DTC using SDS tool. Refer to "Use of SDS Diagnosis Reset
Procedures (Page 1A-14)".
When indicating C13 for IAP sensor #2 / When indicating C17 for IAP sensor #1 (Use of mode select switch)
Step
1 1) Remove the fuel tank. Refer to "Fuel Tank Removal and
Installation in Section 1G (Page 1G-8)".
2) Turn the ignition switch OFF.
3) Check the IAP sensor coupler (#2 (1) or #1 (2)) for loose
or poor contacts.If OK, then measure the IAP sensor
input voltage.
2
4) Disconnect the IAP sensor coupler.
5) Turn the ignition switch ON.
6) Measure the voltage between the R wire and ground.
If OK, then measure the voltage between the R wire and
B/Br wire.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
Tester knob indication
Voltage ( )
IAP sensor input voltage
4.5 – 5.5 V
((+) terminal: R – (–) terminal: Ground, (+) terminal: R
– (–) terminal: B/Br)
V
Is the voltage OK?
Action
1
I822H1110016-01
(A)
I823H1110016-05
Yes
Go to Step 2.
No
• Loose or poor
contacts on the ECM
coupler. (terminal "11"
or "29")
• Open or short circuit
in the R or B/Br wire.