Circuit Description

The throttle position sensor is mounted on the throttle body and detects the throttle valve opening angle. When the throttle valve is fully closed, a voltage of approximately 0.3 to 0.8 V is applied to terminal VTA of the ECM. This voltage increases in proportion to the opening angle of the throttle valve, and reaches approximately 3.2 to 4.9 V when the throttle valve is fully open. The ECM determines the vehicle driving condition through signals transmitted from terminal VTA, and uses this information in calculations such as air-fuel ratio correction, power increase correction and fuel-cut control.

Fig 1: Throttle/Pedal Position Sensor/Switch "A" Circuit Description (M/T)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: DTC Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

After confirming DTCs, confirm the throttle valve position (expressed as on opening percentage) using the hand-held tester or the OBD II scan tool.

Fig 3: Throttle/Pedal Position Sensor/Switch "A" Chart (Using Hand-Held Tester Or OBD II Scan Tool)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002