1994 Lexus SC 400FACTORY OEM SERVICE PROCEDURE

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 across specified terminals of TP sensor connector. See TP SENSOR RESISTANCE  table. See Fig 1. If resistance is not as specified, adjust TP sensor. See THROTTLE POSITION (TP) SENSOR in ADJUSTMENTS article in the ENGINE PERFORMANCE section. Recheck resistance. If resistance is still not as specified, replace TP sensor.

TP SENSOR RESISTANCE

Application & Throttle Plate Position TP Sensor Terminals Ohm Reading
Throttle Fully Closed VTA1 & E2 340-6300
.016" (.40 mm) (1) IDL1 & E2 500 Or Less
* (2) IDL1 & E2 Infinite (Open)
Throttle Fully Open VTA1 & E2 2400-11,200
All Positions VC & E2 3100-7200
(1) Insert feeler gauge between throttle lever and throttle stop screw.
(2) Insert a .026" (.65 mm) feeler gauge between throttle lever and throttle stop screw.
Fig 1: Identifying Terminals Of Sub-TP Sensor & TP Sensor
G94I45268Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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