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Step
4
1) Turn the ignition switch OFF.
2) Connect the ECM coupler.
3) Remove the right air cleaner box. Refer to "Air Cleaner
Element Removal and Installation in Section 1D
(Page 1D-6)".
4) Connect the special tool between the STP sensor and its
coupler.
Special tool
(A): 09900–28630 (TPS test wire harness)
5) Disconnect the STVA lead wire coupler (1).
6) Turn the ignition switch ON.
7) Measure the STP sensor output voltage at the coupler
(between the Y wire (+) and B wire (–)) by turning the
secondary throttle valve (close and open) with your
finger. Refer to "STP Sensor Adjustment in Section 1C
(Page 1C-6)".
Special tool
(B): 09900–25008 (Multi-circuit tester set)
Tester knob indication
Voltage (
)
STP sensor output voltage
Secondary throttle valve is closed: Approx. 0.6 V
Secondary throttle valve is opened: Approx. 4.2 V
((+) terminal: Y/W – (–) terminal: B/BW)
Is the voltage OK?
Action
(B)
(A)
1
Engine General Information and Diagnosis:
Yes
• R, Y/W or B/Br wire
open or shorted to
ground, or poor "5",
"14" or "12"
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)".
I940H1110055-02
I940H1110056-01
1A-68
No
If check result is not
satisfactory, replace the
STP sensor with a new
one. Refer to "STP
Sensor Removal and
Installation in Section
1C (Page 1C-7)".
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