Suzuki LT-Z400, Service Manual

Page: 108 / 492

1A-41 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 the terminal damage or terminal bend.
NOTE
After repairing the trouble, clear the DTC using SDS tool. Refer to “Use of SDS Diagnosis Reset
Procedures (Page 1A-12)”.
C17 (Use of mode select switch)
P
0105
-H for IAP sensor (Use of SDS)
Step Action Yes No
1 1) Turn the ignition switch OFF.
2) Check the IAP sensor coupler for loose or poor contacts.
If OK, then measure the IAP sensor input voltage.
3) Disconnect the IAP sensor coupler.
4) Turn the ignition switch ON.
5) Measure the voltage at the R wire and ground.
If OK, then measure the voltage at the R wire and B/Br
wire.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
(B): 09900–25009 (Needle pointed probe set)
Tester knob indication
Voltage (
)
IAP sensor input voltage
4.5 – 5.5 V
((+) terminal: R – (–) terminal: Ground, (+) terminal: R
– (–) terminal: B/Br)
Is the voltage OK?
Go to Step 3. • Loose or poor
contacts on the ECM
coupler.
• Open or short circuit
in the R wire or B/Br
wire.
I933H1110027-01
(A)
V
(B)
I933H1110028-01
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