Upstop Switch / Mechanical-Electrical Tests
UPSTOP SWITCHMechanical Test
1. Raise vehicle on hoist.
2. Start engine and operate speed control to maintain speed.
3. Depress clutch pedal at least 33 mm (1.30 inch). Speed control operation should terminate. If speed control does not terminate, the upstop switch is defective or the related wiring is shorted. Proceed to the upstop switch electrical test.
Electrical Test
1. Move ignition key to the "OFF/LOCK" position and remove key.
2. Set park brake.
3. Disconnect the clutch interlock/upstop switch connector.
4. Using an ohmmeter, check for continuity between terminals 1 & 2 (Fig. 18) with the upstop switch depressed (clutch pedal at rest). The ohmmeter should show continuity (0 ohms).
5. Depress the clutch pedal at least 33 mm (1.30 inch) check for continuity between terminals 1 & 2. There should be no continuity between the terminals (open circuit).
6. If ohmmeter readings do not fall within these ranges, the switch assembly is defective and should be replaced. If the switch tests ok, wiring is defective.