SEAL-O-RING 0951630 - Caterpillar

Illustration 1 g02258796
Schematic of the "Traction Control Selector (TCS)" solenoid valve
This diagnostic code is associated with the left brake section of the Traction Control Selector (TCS) 4-way solenoid valve. The FMI 05 diagnostic code means that the Brake ECM has determined that the current flowing through the solenoid circuit is below normal.Possible causes for this diagnostic code are:
The energize circuit of the solenoid is open.
The return circuit of the solenoid is open.
The solenoid has failed.
The Brake ECM may have failed, but this situation is unlikely.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 0689 FMI 05 is active before performing this procedure.Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.System Response:The diagnostic code will be logged in to memory and the Traction Control Selector (TCS) will be disabled.Test Step 1. CHECK THE SOLENOID.
Turn the disconnect switch and the key start switch to the ON position. Do not start the engine.
Disconnect the solenoid with the active diagnostic code from the machine harness.
At the machine harness connector for the solenoid, place a jumper wire from contact 1 (wire 774-YL(Yellow)) to contact 4 (wire 775-BR(Brown)).
Observe the status of the CID 0689 FMI 05 diagnostic code.Expected Result:The CID 0689 FMI 05 diagnostic code remains active.Results:
YES - The diagnostic code remains active. The jumper wire does not affect the diagnostic code. Go to Test Step 2.
NO - The diagnostic is no longer active. The solenoid has failed.Repair: The solenoid has failed. Repeat this Test Step "CHECK THE SOLENOID" to verify the solenoid failure. Replace the solenoid. Verify that the new solenoid corrects the problem.STOPTest Step 2. CHECK THE HARNESS FOR AN OPEN.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness connectors from the Brake 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 774-YL(Yellow)) to contact J1-62 (wire 775-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. Go 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 774-YL(Yellow)or in wire 775-BR(Brown)of the machine harness. 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 and clean the harness connectors.
Reconnect all harness connectors.
Turn the disconnect switch and the key start switch to the ON position.
Operate the machine.
Check the status of the CID 0689 FMI 05 diagnostic code.Expected Result:The CID 0689 FMI 05 diagnostic code is active.Results:
YES - The CID 0689 FMI 05 diagnostic code is active. The diagnostic code has not been corrected. The ECM may have failed.Repair: A failure of the Brake ECM