Engine General Information and Diagnosis: 1A-46
3 1) Turn the ignition switch OFF.
2) Connect the ECM coupler. Refer to “ECM Removal and
Installation in Section 1C (Page 1C-1)”.
3) Connect the special tool between the TP sensor and its
coupler.
4) Turn the ignition switch ON.
5) Measure the TP sensor output voltage between the P/W
wire terminal (+) and B/Br wire terminal (–) with turning
the throttle grip open and close.
Special tool
(C): 09900–28630 (TPS test wire harness)
: 09900–25008 (Multi-circuit tester set)
Tester knob indication
Voltage ( )
TP sensor output voltage
Throttle valve is closed: Approx. 1.1 V
Throttle valve is opened: Approx. 4.3 V
((+) terminal: P/W – (–) terminal: B/Br)
Is the voltage OK?
Replace the ECM with a
new one. Refer to “ECM
Removal and
Installation in Section
1C (Page 1C-1)”.
If check result is not
satisfactory, replace TP
sensor with a new one.
Refer to “Throttle Body
Disassembly and
Assembly in Section 1D
(Page 1D-11)”.
Step Action Yes No
ECMTPS
P/W
R
B/Br
(C)
I944H1110028-01
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