W/Electronically Controlled Trans (ECT)

Fig. 74 Throttle position sensor terminal identification:

1. Disconnect throttle position sensor wire connector.
2. Using suitable ohmmeter and feeler gauge inserted between throttle lever and stop screw, take the following resistance measurements:
a. With throttle closed, measure between terminals VTA and E2, Fig. 74. Resistance should be 200-800 ohms.
b. With throttle lever and stop clearance of 0.020 inch (.50 mm), measure between IDL and E2. Resistance should be less than 2300 ohms.
c. With throttle lever and stop clearance of 0.028 inch (.70 mm), measure between IDL and E2. Resistance should be infinity.
d. With throttle valve fully opened, measure between VTA and E2. Resistance should be 3300-10,000 ohms.
e. With throttle valve in any position, measure between VC and E2. Resistance should be should be 3000-7000 ohms.
3. If switch fails to operate as specified, adjust switch as follows:
a. Loosen switch attaching screws, then insert a 0.024 inch (.60 mm) feeler gauge between throttle lever and stop screw.
b. Connect ohmmeter between IDL and E2 terminals.
c. Rotate switch clockwise until ohmmeter needle deflects.
d. Tighten attaching screws.
e. With throttle lever and stop clearance of 0.020 inch (.50 mm), measure between IDL and E2. Continuity should exist.
f. With throttle lever and stop clearance of 0.028 inch (.70 mm), measure between IDL and E2. Continuity should not exist.
4. If switch fails to perform as indicated, switch is defective.