Testing TP Sensor

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2003 Lexus SC 430, 2003 Lexus RX 300, 2003 Lexus LX 470, 2003 Lexus LS 430, and 2003 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect electrical connector from TP sensor. Note electrical terminals on TP sensor. See Fig 1-Fig 2 .

Using ohmmeter, check resistance between terminals VC and E2 on TP sensor. See Fig 1-Fig 2 . Replace TP sensor if resistance is not within specification. See THROTTLE POSITION SENSOR RESISTANCE (ES300, GS300, IS300, GS430 & LS430 table.

THROTTLE POSITION SENSOR RESISTANCE (ES300, GS300, IS300, GS430 & LS430

Application

Terminals

Ohms @ 68°F (20°C)

ES300, GS300 & IS300

VC & E2

⁽¹⁾ 1200-3200

GS430 & LS430

VC & E2/ETA

⁽¹⁾ 1250-2350

⁽¹⁾	Resistance at 68°F (20°C).

Fig 1: Identifying Throttle Position (TP) Sensor Terminals (ES300, GS300 & IS300)

Fig 2: Testing Throttle Position (TP) Sensor (GS430 & LS430)