DRIVEABILITY AND EMISSIONS 6E1-255
THROTTLE POSITION SENSOR
(TPS)
Removal
1. Disconnect the negative battery cable.
2. Disconnect the TPS electrical connector.
3. Remove the two screws and TP sensor from the throttle
body.
Notice: Do not clean the TP sensor by soaking it in solvent.
The sensor will be damaged as a result.
Function Check
Use a Scan Tool to check the TP sensor output voltage at
closed throttle.
• The voltage should be under 0.25 volts.
• If the reading is greater than 0.25 volts, check the throttle
shaft to see if it is binding. Check that the throttle cable is
properly adjusted, also. Refer to Throttle Cable
Adjustment.
• If the throttle shaft is not binding and the throttle cable is
properly adjusted, install a new TP sensor.
Installation
1. Install the TP sensor on the throttle body with two screws.
2. Connect the electrical connector.
3. Connect the negative battery cable.
VEHICLE SPEED SENSOR (VSS)
Removal
1. Disconnect the negative battery cable.
2. VSS is located on the right side of the transmission case
just ahead of the rear propeller shaft. Disconnect the
VSS electrical connector.
3. Remove the bolt and the VSS from the transmission case
by wiggling it slightly and pulling it straight out.
Important: Have a container ready to catch any fluid that leaks
out when the VSS is removed from the transfer case.
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