140
NOTE: When replacing the sensor after testing
make sure the arrow is directed up.
WC159A
Throttle Position Sensor
(TPS)
NOTE: Preliminary checks may be performed on
this component using the diagnostic mode on the
LCD gauge (see EFI Diagnostic System in this sec-
tion).
INSPECTING
PR544
1.
Remove the seats and
rear body panel
; then remove the
two top radiator mounting cap screws and tilt the radia-
tor rearward to access the throttle body.
Remove the
TPS connector plug from the TPS.
NOTE: Prior to testing the TPS, inspect the three-
wire plug connector on the main harness and the
three-pin plug on the TPS for contamination, broken
pins, and/or corrosion.
2. Make sure the ignition switch is in the OFF position;
then select the DC Voltage position on the meter.
3. Connect the red tester lead to terminal B and the black
tester lead to terminal A. Turn the ignition switch to
the ON position. The meter should read approximately
5.0 DC volts.
PR538A
NOTE: If the meter does not read as specified,
check for poor connections at the ECM or open/bro-
ken wires in the wiring harness.
4. Turn the ignition switch to the OFF position.
5. Select the OHMS position on the meter; then perform
the following resistance tests on the TPS.
A. Pin (B) to ground - infinity (open circuit).
B. Pin (A) to pin (C) - approximately 1k ohms (throt-
tle closed).
C. Pin (A) to pin (C) - approximately 5k ohms (throt-
tle full-open).
D. Pin (A) to pin (B) - approximately 5k ohms.
PR535A
NOTE: If any meter reading is not as specified,
replace or adjust the TPS (see INSTALLING/ADJUST-
ING in this sub-section).
6. Connect the positive lead to the battery; then connect
the negative lead.
7. Connect the main harness TPS connector to the TPS;
then using MaxiClips, connect the black tester lead to
the black/green wire and the red tester lead to the
green/black wire.
CAUTION
Always make sure the ignition switch is in the OFF
position before disconnecting the ECM.