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Throttle Position Sensor (TPS)

Turn Ignition Off and disconnect electrical connector at TPS. Insert a thickness gauge between throttle stop screw and throttle lever. Using an ohmmeter, check resistance values. See Fig 1. If values are not as specified in chart, adjust or replace TPS.

Fig 1: Checking Throttle Position Sensor
G45986Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TPS RESISTANCE SPECIFICATIONS

Throttle Clearance Terminals Ohmmeter Reading
.020" (.50 mm) IDL - TL Low Value
" PSW - TL Infinity
" IDL - PSW Infinity
.035" (.90 mm) IDL - TL Infinity
" PSW - TL Infinity
" IDL - PSW Infinity
Fully Open IDL - TL Infinity
" PSW - TL Low Value
" IDL - PSW Infinity