Engine General Information and Diagnosis: 1A-46
4 1) Turn the ignition switch OFF.
2) Connect the special tool between the TP sensor and its
coupler.
3) Turn the ignition switch ON.
4) Measure the TP sensor output voltage between the P/B
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/B – (–) terminal: B/Br)
Is the voltage OK?
• P/B, R or B/Br wire
open or shorted to
ground, or poor “8”,
“11” or “29”
connection.
• If wire and
connection are OK,
intermittent trouble or
faulty ECM.
• Recheck each
terminal and wire
harness for open
circuit and poor
connection.
• Replace the ECM
with a known good
one, and inspect it
again. 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-12)”.
Step Action Yes No
ECM
TPS
P/B
R
B/Br
(C)
I822H1110031-03
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