Toyota 89452-30150
Throttle Position Sensor

The replacement process for the throttle position sensor begins by unscrewing the 2 set screws followed by sensor removal before sensor installation which requires the throttle valve at an opening angle of 3.5 degrees and sensor positioning 150 degrees right from the specification with counterclockwise shaft rotation until touch is achieved followed by set screw torque. Starting from 150 degrees right of the designated position the sensor needs to be turned counterclockwise slowly until it contacts the throttle valve shaft before temporarily tightening the set screws. The first step involves connecting only the throttle position sensor connector and plugging the TOYOTA hand-held tester to DLC3 followed by turning ON the ignition without pressing the accelerator pedal. Adjust the sensor so that the CURRENT DATA shows the standard throttle valve opening percentage at its center position before torquing the screws to 1.7 N.m (17.5 kgf.cm, 15 in.lbf) while maintaining a standard valve opening percentage of 14.8 plus or minus 0.8%. Check the sensor position and throttle valve opening percentage of 10 - 14% through use of a screwdriver to close the valve fully after assembly. Repetition of the adjustment steps is necessary if the achieved percentage differs from the specified value. As the last step paint the sensor set screws and turn the ignition switch OFF followed by disconnecting the TOYOTA hand-held tester from the DLC3 and removing the throttle position sensor connector.

Remove the 4 bolts and the sensor, then reinstall the sensor with the 4 bolts, tightening to a torque of 5.4 N.m (55 kgf.cm, 48 in.lbf).