Page 1256 - Workshop Manual - Tunland (2017)

11-68 ENGINE CONTROL SYSTEM - ACCELERATOR CONTROL SYSTEM

11
ACCELERATOR CONTROL SYSTEM
HOW IT WORKS

The accelerator pedal assembly is mounted in the cab.The throttle position sensor is a Holzer
effect sensor and connected to the accelerator pedal.When the accelerator pedal is lowered
or released, the signal voltage generated by the throttle position sensor to the engine control
module (ECM) will change. When the accelerator pedal is at 0%, the ECM will receive a low
signal voltage. When the accelerator pedal is at 100%, the ECM will receive a high signal
voltage. The accelerator pedal position circuit comprises an accelerator pedal position 5V
power supply circuit, an accelerator pedal position loop circuit and an accelerator pedal
position signal circuit. The accelerator pedal has two position sensors which are used to
measure the throttle position. The two position sensors receive the 5V power supplied by
the ECM and also receive the corresponding signal voltage supplied by the ECM according
to the accelerator pedal position.The throttle position NO.1 signal voltage is two times of the
throttle position NO.2 signal voltage.