SEAL-RING 3338007 - Caterpillar

Illustration 1 g02598216
Schematic of the "Stick Angle" SensorThis diagnostic code is recorded when the ECM reads the voltage of the circuit for the "Stick Angle" Sensor as being below normal. The signal circuit of the sensor may be shorted to ground.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. A failure of the Machine ECM 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.Note: Ensure that the diagnostic code of CID 2426 FMI 04 is active before performing 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:The CID 2426 FMI 04 diagnostic code remains active. Results:
OK - The diagnostic code remains active. The sensor is correct. Proceed to Test Step 2.
NOT OK - The diagnostic code is no longer active. The sensor has failed.Repair: Replace the entire sensor.STOPTest Step 2. CHECK THE WIRING HARNESS OF THE SENSOR FOR A SHORT TO GROUND.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness from the sensor.
Disconnect machine harness connectors from the ECM.
At the machine harness connector for the ECM, measure the resistance from the signal contact J1-47 (wire J851-BR) of the machine harness to all possible sources of ground. Measure the resistance to all contacts that are used in the J1 and J2 harness connectors.Expected Result:Each resistance measurement should be greater than 5000 ohms.Results:
OK - Each resistance measurement is greater than 5000 ohms. The machine harness is correct. Proceed to Test Step 3.
NOT OK - One or more of the measurements are not correct. There is a short in the machine harness. The short is between signal contact J1-47 (wire J851-BR) and the circuit with the low resistance measurement. Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK IF THE DIAGNOSTIC CODE REMAINS.
Inspect the contacts of the harness connectors. Clean the contacts of the harness connectors.
Reconnect all harness connectors.
Turn the disconnect switch and the key start switch to the ON position.
Enter the service mode of the Monitoring System and clear all of the inactive diagnostic codes.
Operate the machine.
Check the status of the CID 2426 FMI 04 diagnostic code.Expected Result:The CID 2426 FMI 04 diagnostic code is not active. Results:
YES - The CID 2426 FMI 04 diagnostic code is not active. The diagnostic code does not exist at this time. The initial diagnostic code was probably caused by a poor electrical connection or a short at one of the harness connectors. Resume normal machine operation.STOP
NO - The CID 2426 FMI 04 diagnostic code is active. The diagnostic code has not been corrected. A failure of the ECM is unlikely.Repair: Exit this procedure and perform this