Corolla, Echo & Highlander

WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2003 Toyota Tacoma, 2003 Toyota RAV4, 2003 Toyota Prius, 2003 Toyota Matrix, and 2003 Toyota MR2. However, it is still accessible from the selected car via links, so may be relevant.

Manufacturer does not list procedure for Throttle Position (TP) sensor adjustment. Only information available is for checking resistance of TP sensor.
Disconnect electrical connector from TP sensor. Note electrical terminals on TP sensor. See Fig 1-Fig 3 .
Using ohmmeter, check resistance between specified terminals in relation to throttle position. See THROTTLE POSITION SENSOR RESISTANCE table. Replace components as necessary if resistance is not within specification.

Fig 1: Identifying Throttle Position Sensor Terminals (Corolla)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Identifying Throttle Position Sensor Terminals (ECHO)

Fig 3: Identifying Throttle Position Sensor Terminals (Highlander)