ORIFICE 3443549 - Caterpillar

Illustration 1 g01278557
Travel Pilot Pressure Solenoid connectionsThis diagnostic code is associated with the Travel Pilot Pressure Solenoid. The FMI 05 means that the Machine Control ECM has determined that the circuit current for the solenoid is below normal.The Travel Pilot Pressure Solenoid is a proportional solenoid that is controlled by a Machine Control ECM PWM driver output. In order to control the solenoid, the ECM will change the current of the PWM output signal for the solenoid.Conditions that could cause this diagnostic code are listed below:
The solenoid has failed.
The energize circuit of the solenoid is open or has a poor connection.
The return circuit of the solenoid is open.
The ECM has failed. This is unlikely. Before performing this procedure, inspect the harness connectors that are involved in the circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all connections in the circuit are clean, secure and in good condition. If a problem with a connection is found, correct the problem and verify that this diagnostic code is active before performing this procedure. Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear these diagnostic codes when the original diagnostic code has been corrected.Test Step 1. CHECK THE SOLENOID
Disconnect the solenoid from the machine harness.
At the machine harness connector for the solenoid, connect a jumper wire from contact 1 (wire K923-PU) to contact 2 (wire H806-OR).
Turn the disconnect switch and the key switch to the ON position. Do not start the engine.
Observe the status of the CID 2149 FMI 05 diagnostic code.Expected Result:The active diagnostic code changes from an FMI "05" to an FMI "06" diagnostic code as the jumper wire is installed.Results:
YES - The active diagnostic code changes from an FMI "05" to an FMI "06" diagnostic code when the jumper wire is installed. The solenoid has failed.Repair: The solenoid has failed. Repeat this Test Step "CHECK THE SOLENOID" in order to verify the solenoid failure. Replace the solenoid. Verify that the new solenoid corrects the problem.STOP
NO - The CID 2149 FMI 05 diagnostic code remains active. The jumper wire does not affect the status of the diagnostic code. The solenoid is not causing the problem. Proceed to Test Step 2.Test Step 2. CHECK THE CIRCUIT FOR AN OPEN
Turn the key switch and the disconnect switch to the OFF position.
The jumper wire that was installed in the previous test step remains in place.
Disconnect the machine harness ECM connector J1 from the Machine Control ECM.
At the machine harness connector J1 for the ECM, measure the resistance from the supply contact J1-49 (wire K923-PU) to the return contact J1-50 (wire H806-OR).
While observing the multimeter resistance measurement, wiggle the machine harness connectors for the ECM. Gently pull on the wires and move the wires around.
While observing the multimeter resistance measurement, wiggle the machine harness connector for the solenoid. Gently pull on the wires and move the wires around. Do not disconnect the jumper wire.Expected Result:The resistance measurement is