Throttle Position Sensor: Testing and Inspection

Adjustment
1) Warm up engine to normal operating temperature.
2) Check to make sure that fast idle cam and cam follower lever are not in contact with each other. It they are, check fast idle control system.
3) Loosen TP sensor screws.





4) Remove ECM, Service and Repair and with couplers connected to ECM, connect digital type voltmeter as shown.





5) Turn TP sensor clockwise or counterclockwise and tighten TP sensor screw at a position where voltage as specified below is obtained at coupler terminal E33-17 (E175-25).





NOTE: If tech 1 and cartridge are available, it is not necessary to remove ECM. Make an adjustment while observing TP sensor voltage displayed on tech-1.

TP sensor voltage when throttle is fully closed:
0.50 1 0.15 V

Tightening Torque
(a): 2.5 N.m (0.25 kg-m, 1.8 lb-ft)

6) Check to make sure that when throttle is fully open TP sensor voltage is as shown below.

TP sensor voltage when throttle is fully open :
4.0 ± 0.5 V

7) Install ECM.
8) With ignition switch OFF, disconnect battery negative cable from battery for one minute or more.
9) Connect negative cable to battery.