PIPE-EXHAUST 8B8795 - Caterpillar

Illustration 1 g02796698
Schematic of the Steering Charge Press SensorThis diagnostic code is associated with the pressure sensor (charge). The FMI 04 means that the ECM has determined that the voltage of the circuit for the position sensor is below normal. The pressure sensor is an analog sensor with operating range of 0.0 (0.0) to 3160 kPa (458 psi). The sensor varies the voltage in relation to the pressure from 0.045 V to 5 V. Use the following formula for an output for a given pressure:Volts out = 5 x [(Pressure (kPa) x 0.00030178) + 0.0454]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. ECM failure 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 0473 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