BAR AS 8V8500 - Caterpillar

Illustration 1 g02119113
Schematic of the steering pilot oil pressure sensor
Sales models 854K/992K and 854G/992G
This diagnostic code is associated with the steering pilot oil pressure sensor. The FMI 04 means that the ECM has determined that the voltage of the circuit for the sensor is below normal. The pressure sensors are PWM sensors. The PWM signal is dependent on the input pressure and the signal will vary.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. This 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 0430 FMI 04 is active before performing this procedure. Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.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 Result: