The accelerator pedal position sensor converts the amount that the accelerator pedal is depressed (angle) to an electrical signal that is sent to the engine ECU. In addition, to ensure reliability, this sensor outputs signals from two systems with differing output characteristics. There are two types of accelerator pedal position sensors, the linear type and the hall element type.
1. Linear type
The construction and operation of this sensor is basically the same as the linear type throttle position sensor. Of the signals from the two systems, one is a VPA signal that linearly outputs the voltage within the entire range of the accelerator pedal depression. The other is the VPA2 signal, which outputs the offset voltage from the VPA signal.
SERVICE HINT:
Do not remove the sensor. Extremely fine position adjustment is required when installing the sensor. Therefore, replace the accelerator pedal assembly when the sensor malfunctions.
2. Hall element type
The construction and operation of this sensor is basically the same as the hall element type throttle position sensor. To ensure better reliability, an independent electrical circuit is provided for each of the two systems.