Troubleshooting Flowchart - Throttle Position (Tp) Sensor - Honda Prelude 1993 Service Manual

PGM-FI System
Troubleshooting Flowchart - Throttle Position (TP) Sensor
lf1=lllfifl
The Malfunction Indicator Lamp (MlL) indicates Diagnostic Trouble Code IDTC) 7: A problem in
.:.
:
the Throttle Position {TP) Sensor circuit.
The TP Sensor is a potentiometer. lt is connected to the throttle valve shaft. As the throftle position changes, the TP
Sensor varies the voltage signal to the ECM.
ERUSH
HOLDER
OUTPUT VOLTAGE NI
lr6t1
:.t1
- Y r
- t -
BRUSH
RESISTOR
TERMINAL
5
4
3
2
1
o . 5
0
THROTTLE
;;ii-
oPEt{rNG
THROTTLE
INNER
BRUSH
I
i
YES
GNN/
WHT
{ T o p a g e 1 1 - 7 5 }
1 1-7 4
YEL/ RED/
WI{T BLK
- Engino b running.
- Tho MlLhas beon reDorted on.
- With sorvico check connoctot
iumpsd ls6o page 1 142), codo
7 is indicatod.
Do the ECM Reset Procedure (see
p a g e 1 1 - 4 3 ) .
Inlormittont Iailure, systom b OK
at this timo lt6st d.ivs m6y b6
nocossaryl.
Chock tor Dooi connections or
loos€ wiros at O125, g*13 llocat-
od at right shock rowerl, C113
(TP sonsorl, A/T: C4'l l ITCMI
and ECM.
ls the MIL on and does it
indicate code 7?
Turn the ignition switch OFF.
Disconnect the 3P connector from
the TP sensor.
Turn the ignition switch ON.
Measure voltage between YEL/
WHT (+ ) terminal and GRNMHT
(- ) terminal.
Measure voltage between YEL/
WHT (+) rorminal and body
grouno,
ls there approx. 5 V?
(To page 'l1-75)