Throttle Position Switch: Testing and Inspection
MANUAL TRANSMISSIONEnsure that throttle plate is properly adjusted as outlined in "THROTTLE PLATE ADJUST" before adjusting throttle switch.
Fig. 7 Throttle switch test connections:
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.
AUTOMATIC TRANSMISSION
Ensure that throttle plate is properly adjusted as outlined in "THROTTLE PLATE ADJUST" before adjusting throttle switch.
Pin Designations (Throttle Valve View):
Throttle Switch Pin ID - Automatic Transmission:
1. With throttle valve closed, check resistance between connections.
#4 and #6 0 ohms (closed circuit)
#5 and #6 infinity (open circuit)
2. When throttle is opened, check resistance between connections.
#4 and #6 infinity (open circuit).
#5 and #6 0 ohms (closed circuit)
3. If operation is not satisfactory, replace switch.