ELBOW 0029046 - Caterpillar

Illustration 1 g02142413
Connections of the brake pressure solenoid
This diagnostic code is associated with the brake pressure solenoid. The FMI 05 means that the ECM has determined that the current for the solenoid is below normal.The possible causes of this diagnostic code are listed:
The energize circuit of the solenoid is open.
The return circuit of the solenoid is open.
The solenoid has failed.
The ECM has failed. An ECM failure is unlikely.Note: 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, that all connections are secure and that all connections are 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. Ensure that the diagnostic code of CID 2596 - FMI 05 is active before performing this procedure.Note: Use a digital multimeter for the measurements in this procedure.Test Step 1. Check the solenoid
Turn the disconnect switch and the key start switch to the OFF position.
Disconnect the solenoid from the machine harness.
At the machine harness connector for the solenoid, place a jumper wire from contact "1" wire (F792-WH(White)) to contact "2" wire (K952-BR(Brown)).
Turn the disconnect switch and the key start switch to the ON position. Do not start the engine.
Observe the status of the diagnostic code. Expected Result:The diagnostic code changes from FMI 05 to an FMI 06 after the jumper wire is installed.Results:
YES - The FMI 05 diagnostic code remains active. The jumper wire does not affect the diagnostic code. The solenoid is correct. Proceed to Test Step 2.
NO - The diagnostic is no longer active. An FMI 06 diagnostic code is active. The solenoid has failed.Repair: The solenoid has failed. Replace the solenoid. Verify that the new solenoid corrects the problem.STOPTest Step 2. Check the circuit for an open
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness connectors from the ECM.
The jumper wire that was installed in the previous test remains in place.
At the machine harness connector, measure the resistance from signal contact J1-58 wire (F792-WH(White)) to contact J1-60 wire (K952-BR(Brown)). Expected Result:The resistance is less than 5.0 ohms.Results:
YES - The resistance is less than 5.0 ohms. The machine harness is correct. Proceed to Test Step 3.
NO - The resistance is greater than 5000 ohms. The resistance measurement is not correct. There is an open circuit in the machine harness.Repair: The open is in wire (F792-WH(White) or in wire (K952-BR(Brown)) of the machine harness. Repair the machine harness or replace the machine harness.STOPTest Step 3. Check the operation of the ECMThe disconnect switch and the key start switch remain in the OFF position. The machine harness connector for the solenoid and the ECM