Throttle Position Switch: Testing and Inspection

Fig. 7 Throttle switch test connections:

Ensure that throttle plate is properly adjusted as outlined in "THROTTLE PLATE ADJUST" before adjusting throttle switch.
1. Disconnect electrical connector from throttle switch and connect ohmmeter between terminals 3 and 18 on switch, Fig. 7.
2. Meter should indicate continuity at wide open throttle and no continuity with throttle in any other position.
3. Connect ohmmeter between terminals 2 and 18 on switch, Fig. 7.
4. Meter should indicate continuity with throttle closed and infinite resistance as soon as throttle is opened.
5. If readings are not as specified, loosen switch mounting screws, adjust switch position, tighten screws and check switch operation.
6. If switch cannot be adjusted to obtain proper operation, replace switch.