WHEEL-REAR 3083168 - Caterpillar

Illustration 1 g01079534
Schematic for Hydraulic SensorThis diagnostic code is associated with the hydraulic pressure sensor. This diagnostic code indicates that the ECM has determined that the signal of the sensor is above the normal range. The possible causes of this diagnostic code are listed below:
The sensor has failed.
The signal circuit of the sensor is shorted to the positive battery circuit.
The ECM has failed. This is unlikely.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.Use the 146-4080 Digital Multimeter for the measurements in this procedure.System Response:When this diagnostic code is active the mode for the hydraulic control system should not change.Test Step 1. INSPECT THE SENSOR.
Perform a visual inspection of the sensor, the wiring for the sensor and the hardware that is associated with the sensor.Expected Result:There is no apparent damage to the sensor, the wiring for the sensor or the hardware that is associated with the sensor.Results:
OK - There is no damage to the sensor, the wiring for the sensor or the hardware that is associated with the sensor. Proceed to Test Step 2.
NOT OK - There is apparent damage to the sensor, the wiring for the sensor or the hardware that is associated with the sensor. Repair: Replace the damaged part.STOPTest Step 2. 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 7X-1710 Multimeter Probe along contact "A" of the supply wire.
Turn the key start switch and the disconnect switch to the ON position.
Measure the voltage from contact "A" to frame ground.Expected Result:The voltage measurement is 5 VDC.Results:
OK - The voltage measurement is 5 VDC. Proceed to Test Step 3.
NOT OK - The voltage measurement is NOT 5 VDC. The circuit is open. Repair: Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK THE WIRING HARNESS OF THE SENSOR FOR AN OPEN CIRCUIT.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness from the sensor.
At the harness connector, connect a jumper wire between contact "B" and contact "C".
Disconnect the machine harness connector(s) from the ECM.
At the harness connector for the ECM, measure the resistance between contact J1-21 (L731-BR wire) and contact J1-36 wire (Y920-BU).Expected Result:The resistance is less than 5 ohms.Results:
OK - The resistance is less than 5 ohms. The circuit is correct. Proceed to Test Step 4.
NOT OK - The resistance is greater than 5 ohms. The ground circuit is not correct. There is an open circuit in the wiring harness.Repair: Replace the wiring harness or repair the wiring harness.STOPTest Step 4. CHECK THE SIGNAL OF THE SENSOR.
Turn the key start switch and the disconnect switch to the OFF position.
The 7X-1710 Multimeter Probe remains on ground wire contact "B".Note: ET MAY ALSO BE USED IN ORDER TO CONFIRM THAT THE SENSOR IS OPERATING CORRECTLY.
At the back of the harness connector for the sensor, insert