GAUGE AS-OIL LEVEL 9R1043 - Caterpillar

Illustration 1 g02575881
Schematic for the Implement Left Main Valve Supply Pressure Sensor
This diagnostic code is recorded when the ECM reads the input signal from the Implement Left Main Valve Supply Pressure Sensor and the PWM duty cycle is above normal.The sensor is a PWM sensor that operates at a frequency of approximately 500Hz 100Hz. The sensor sends a PWM input signal to the ECM. The duty cycle of the signal will vary from 2% to 98%.The possible causes of this diagnostic code are listed below:
There is an open in the sensor circuit.
The signal circuit is shorted to another circuit.
The sensor has failed.
The ECM has failed. This condition is unlikely.System Response:
Hydraulic performance may be reduced at lower engine speeds.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 2415 FMI 03 is active before performing this procedure.Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.Test Step 1. CHECK FOR POWER AT THE SENSOR
Do not disconnect the harness connector from the sensor.
At the back of the harness connector for the sensor, insert a multimeter probe along contact 1 wire X800-OR(Orange)for the voltage supply.
Turn the key start switch and the disconnect switch to the ON position.
Measure the voltage from contact 1 wire X800-OR(Orange)to contact 2 wire X998-BR(Brown).Expected Result:The voltage is 8 VDC 0.4 VDC.Results:
OK - The voltage is 8 VDC 0.4 VDC. Proceed to Test Step 3.
NOT OK - The voltage is not 8 VDC 0.4 VDC. The circuit is open.Repair: Repair the machine harness or replace the machine harness.STOPTest Step 2. CHECK THE SIGNAL CIRCUIT OF THE SENSOR
Turn the key start switch and the disconnect switch to the OFF position.
At the back of the harness connector for the sensor, remove the multimeter probe from contact "1" and insert the probe along the signal wire (contact "3").
At the back of the harness connector for the sensor, insert the multimeter probe along the ground wire (contact "2").
Turn the disconnect switch and the key start switch to the ON position.
Monitor the signal of the sensor with the