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Home >> Lexus >> 1990 >> LS 400 V8-4.0L (1UZ-FE) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Throttle Position Sensor >> Adjustments
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Throttle Position Sensor: Adjustments

Throttle Body And TPS:





- Remove throttle body, refer to COMPONENT REPLACEMENT AND REPAIR PROCEDURES.

Throttle Stop Screw:






- Check that there is no clearance between throttle stop screw and lever with throttle plate in the fully closed position.

TPS Screws:






- Loosen throttle position sensor set screws.






- Connect ohmmeter across throttle sensor terminals E2 and IDL.
- Insert a 0.0157 inch (0.40 mm) feeler gauge between throttle stop screw and lever.

TPS Adjustment:






- Slowly turn sensor clockwise until ohmmeter shows no continuity.
- Tighten sensor set screws.






- Check adjustment with the following feeler gauges and note ohm reading:

0.0157 inch (0.40 mm) - Continuity
0.0335 inch (0.85 mm) - No continuity

- If desired results cannot be achieved, readjust sensor. If readings still cannot be achieved, replace sensor.