PLATE 4Z9344 - Caterpillar

Temperature Sensor (Transmission Oil)
Illustration 10 g01120194
Temperature SensorNote: A machine is equipped with a transmission oil temperature sensor and a torque converter temperature sensor. Both sensors are similar, but the location is different. Other machines use the transmission oil temperature sensor which is located below the pump on the suction side. The temperature sensor for the steering oil informs the ECM of the temperature of the steering system oil. The ECM uses the information about the temperature in order to adjust the commands for braking control. The adjustment compensates for the effect of cold oil on the brake valve. The ECM reduces the command for the brake pressure for full retraction when the steering oil temperature is below a certain temperature.The transmission oil temperature sensor informs the ECM of the temperature of the transmission oil. The ECM uses the information for the temperature to adjust shifting time of the transmission. The adjustment will provide smooth shifting over the full range of the transmission oil temperature. On some machines, the ECM also uses transmission oil temperature in order to perform adjustments on the commands for brake control. The temperature sensor is a resistive sender. The higher resistance reading will output a higher temperature reading.Pressure Sensor (Steering Charge)
Illustration 11 g01135291
The steering charge pressure sensor is located on the rear of the tractor under the fuel tank. The sensor is located on the inlet side of the filter housing. The pressure sensor informs the ECM of system pressure. The position sensor outputs a pulse width modulated signal. The duty cycle of the signal will vary in proportion to the system pressure. The PWM signal is an input to the ECM. The ECM uses the signal in order to monitor the pressure of the steering system. The ECM provides an 5 volt supply to the sensor.The charge pressure sensor connects to the ECM through contact J1-36.Position Sensor (Service Brake Pedal)
Illustration 12 g00904530
Position Sensor (Service Brake Pedal)The position sensors inform the ECM of the position of the pedals that are controlled by the operator. The position sensors output a pulse width modulated signal. The duty cycle of the signal will vary in proportion to the position of the pedal. These PWM signals are inputs to the ECM. The ECM uses the signals in order to determine the position of the pedal. The frequency of this signal is constant at approximately 500 Hz. The ECM provides an 8 volt supply to the sensor. The position sensor for the service brake pedal continuously informs the ECM of the position of the service brake pedal. The ECM uses the duty cycle of the signal in order to determine the position of the pedal. The ECM uses the position of the pedal in order to determine the desired speed of the machine and the desired state of the parking brake. The duty cycle of the sensor signal decreases as the pedal is depressed. Position Sensor (FNR Shifter)
Illustration 13 g01135559
The sensor informs the ECM of the position of the direction/speed control lever