Cherokee 2WD L4-150 2.5L VIN H TBI (1988)
Throttle Position Sensor: Adjustments
Manual Transmission
***UPDATED BY TSB #18-54-88
1.
Turn the ignition switch to the "ON" position.
TPS Terminal Identification
2.
Do Not remove the electrical connector from the TPS. Connect the positive lead of the voltmeter to terminal C and the negative lead to terminal B
of the TPS connector. The leads must be inserted through the back of the connector to make contact with the terminals. The terminal
identification letters are molded into the connector.
3.
With the throttle plate held in the wide open throttle (W.O.T.) position, note the "input" voltage. It should be approximately 5.0 volts.
4.
Remove the voltmeter positive lead from terminal C and connect it to terminal A. The "output" voltage should be 4.6 to 4.7 volts. If this is not the
case, continue with this procedure.
5.
Adjust output voltage as follows:
a.
With the voltmeter leads still attached, carefully loosen the sensor mounting screw.
b.
Slowly rotate the sensor until the output reading is 4.6 to 4.7 volts with the throttle wide open.
c.
Tighten the sensor mounting screws securely. Be sure not to disturb the sensor's position while tightening the screws.
