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Home >> Lexus >> 1997 >> SC 400 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Engine Sensors & Switches >> Throttle Position (TP) Sensor
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Throttle Position (TP) Sensor

NOTE: Vehicles with Traction Control System (TRAC) are equipped with a main TP sensor and a sub-TP sensor. The following procedure applies to main TP sensor. For sub-TP sensor, see SUB-THROTTLE POSITION (SUB-TP) SENSOR.

Disconnect TP sensor connector. Measure resistance between specified terminals of TP sensor connector. See TP SENSOR RESISTANCE  table. See Figure. If resistance is not as specified, adjust TP sensor. See THROTTLE POSITION (TP) SENSOR in ADJUSTMENTS article. Recheck resistance. If resistance is still not as specified, replace TP sensor.

TP SENSOR RESISTANCE

Application & Throttle Plate Position (1) TP Sensor Terminals Ohm Readings
Throttle Fully Closed VTA1 & E2 340-6300
.016" (.40 mm) (2) IDL1 & E2 500 Or Less
*(3) IDL1 & E2 Infinite (Open)
Throttle Fully Open VTA1 & E2 2400-11,200
All Positions VC & E2 3100-7200
(1) Disconnect vacuum hose from throttle opener. Apply vacuum to throttle opener to allow throttle to fully seat.
(2) Insert feeler gauge between throttle lever and throttle stop screw.
(3) Insert a .026" (.65 mm) feeler gauge between throttle lever and throttle stop screw.
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