SEAL-SHAFT 1432821 - Caterpillar

Illustration 1 g02174939
Schematic of the Boom Up Pilot Pressure sensor This diagnostic code is associated with the Boom Up Pilot Pressure sensor. An FMI 06 diagnostic code means the Machine ECM has determined the current in the sensor signal output circuit is above normal. For machines equipped with the E-Fence feature, reference Troubleshooting, " E-Ceiling and Cab Avoidance - Troubleshoot"Possible causes of this diagnostic code are listed below:
The sensor may have failed.
The sensor output signal may be shorted to ground.
The Machine ECM may have failed (unlikely).Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes now, but clear those codes after the original diagnostic code has been corrected. Note: Poor connections are often the cause of a problem in electrical circuits. Before performing this procedure, inspect all of the harness connectors involved in the circuit. Verify that all of the connections in the circuit are clean, secure, and in good condition. If a problem is found with any of the connections: correct the problem and verify that diagnostic code CID 2429 FMI 06 is still active, before performing the following procedures. Test Step 1. CHECK THE SENSOR, THE ECM, AND THE CIRCUIT CONNECTIONS IN THE MACHINE HARNESS.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness connector from the Boom Up Pilot Pressure sensor.
Turn the key start switch and the disconnect switch to the ON position. Do NOT start the engine.
Observe the status of the diagnostic code.Expected Result:The CID 2429 FMI 06 diagnostic code does not change. Results:
YES - The diagnostic code does not change, and remains active. The sensor is NOT the cause of the problem. A machine harness may have failed, or the ECM may have failed. Go to Test Step 2.
NO - The CID 2429 FMI 06 code is no longer active, and has changed into an active CID 2429 FMI 03 diagnostic code. The ECM has detected this valid diagnostic code. The ECM, and the harness, are correct. The sensor has failed. Replace the sensor. Go to