CLAMP 2803765 - Caterpillar

OK - Both of the voltage measurements are less than 8.0 0.4 VDC. The power supply for the sensor is not correct. Repair: If both of the voltage measurements are not correct, the problem is most likely in the wire of the power circuit. This condition will cause multiple diagnostic codes to activate.Refer to the complete Electrical System Schematic for the machine. Examine all of the connectors that are in the power and ground circuits. Ensure that the connections are clean, that the connectors are secure and that the connectors are in good condition.For troubleshooting the ECM power supply, refer to the CID 0041 diagnostic code in the troubleshooting section of the manual for the Implement ECM 2.STOP
NOT OK - One of the voltage measurements is not correct.Repair: If only one of the voltage measurements is correct, a problem exists in the ground circuit that registered the bad measurement. This condition will not cause this diagnostic code to activate. There is another problem that is causing this active diagnostic code. However, the ground circuit must be repaired before proceeding with this procedure.Do not operate the machine with only one ground connection for the left joystick.Repair the faulty ground circuit or the supply circuit for the power before proceeding with this procedure.After repairing the faulty ground circuit, proceed to Test Step 3.Test Step 3. CHECK THE SIGNAL AT THE SENSORThe key start switch and the disconnect switch remain in the OFF position.
At the machine harness connector J1 for the left joystick, use a 151-6320 Removal Tool to remove the signal wire U739-BR(Brown) and the socket at contact J1-2 from the harness connector. The machine harness connector J1 remains connected to the connector for the left joystick.
At the back of the connector for the joystick J1, insert 7X-1710 Multimeter Probes along the sensor signal contact J1-2 and ground contact J1-4.
Turn the disconnect switch and the key start switch to the ON position.
Measure the duty cycle of the sensor at the connector contacts for the joystick J1-2 and J1-4. Move the joystick through the full range of the sensor that is described at the beginning of this procedure. Expected Result:The duty cycle of the "Steering Sensor 1" is correct according to the description at the beginning of this procedure.Results:
OK - The duty cycle of the sensor is correct. The sensor is not the cause of the problem. Reinstall the signal wire U739-BR(Brown) and the socket back to the original location at contact J1-2 in the machine harness connector for the joystick. Verify that all of the wires of the joystick are in the correct locations. Observe that the wires are secure in the connector before proceeding to the next step. Proceed to Test Step 5.
NOT OK - The duty cycle of the "Steering Sensor 1" is not correct according to the description at the beginning of this procedure. The sensor has failed.Repair: Perform this test step again in order to verify that the sensor signal is