77050017 Spring Caterpillar parts Spring
Alternative (cross code) number:
Illustration 1 g00779650
Position Sensor (Left Brake Pedal)
The position sensor for the left brake pedal sends an input to the ECM. The sensor will continuously update the power train ECM on the position of the left pedal. The ECM records the change of position. Then, the ECM activates the appropriate solenoid valve.The position sensor for the left brake pedal is a PWM sensor. The sensor continuously generates a PWM signal. The duty cycle varies in proportion to the position of the pedal. The ECM receives the PWM signal from the position sensor. The ECM measures the duty cycle in order to determine the position of the pedal. The frequency of the sensor signal is constant at 5000 Hz. The machine electrical system provides +battery voltage to the pedal position sensor for operating power.