CONTROL GP-PARKING BRAKE 2132359 - Caterpillar

Illustration 1 g02572818
Schematic of the rod end pressure sensor (Ejector cylinder)This diagnostic code is associated with the Rod End Pressure Sensor (Ejector Cylinder). The FMI 04 means that the ECM has determined that the voltage of the circuit for the pressure sensor is below normal.The output frequency of the pressure sensor is approximately 500 100 Hz. The duty cycle of the signal changes as the pressure sensor moves.The possible causes of this diagnostic code are listed below:
The signal circuit for the sensor is shorted to ground.
The sensor has failed.
The ECM has failed. The failure of ECM is unlikely.Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear the diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 3496 FMI 04 is active before performing this procedure. Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.System Response:When this diagnostic code occurs, a warning (Category 1) is shown on the monitor. The diagnostic code will cause the solenoids for the ejector control to be set to the minimum command. Control of the ejector cylinder will not return until the diagnostic code is inactive. The signal from the pressure sensor must be in the neutral position for at least 2 seconds.Test Step 1. CHECK THE SENSOR
Turn the disconnect switch and the key start switch to the ON position.
Ensure that the diagnostic code is active.
Observe the status of the diagnostic code. Disconnect the sensor from the machine harness.Expected