HOSE AS 9V9551 - Caterpillar

Illustration 1 g01144436
Schematic of the solenoid valves (parking brake)
This diagnostic code is associated with the remote control parking brake solenoid (No.3). The FMI 05 means that the ECM has determined that the current of the solenoid is below normal. The possible causes of this diagnostic code are listed below:
There is an open in the circuit
The solenoid has failed
The ECM may have failed, but is unlikelyNote: 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 1925 FMI 05 is active before performing this procedure.Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.System Response:When this diagnostic code is active, the ECM will be unable to control the parking brake solenoids. The parking brake will always be engaged.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 machine harness from the solenoid.
At the machine harness connector for the solenoid, place a jumper wire from connector contact 1 (wire F921-BR(Brown)) to connector contact 2 (wire T946-PU(Purple)).
Observe the status of the CID 1925 FMI 05. Expected Result:The CID 1925 FMI 05 remains active. The FMI has not changed and the "05" is still active.Results:
YES - The diagnostic code remains active. The jumper wire does not affect the diagnostic code. Proceed 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NO - The diagnostic is no longer active.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" in order 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 J2 machine harness connector from the ECM.
The jumper wire that was used in the previous Test Step remains in place when testing the solenoid circuit.
At the J2 machine harness connector, measure the resistance from connector contact J2-6 (wire F921-BR(Brown)) to connector contact J2-8 (wire T946-PU(Purple)).
Observe the resistance. Expected Result:The resistance is less than 5 ohms.Results:
YES - The resistance is less than 5 ohms. The machine harness is correct. Proceed to Test Step 3.
NO - The resistance is greater than 5 ohms. There is an open circuit in the machine harness.Repair: The open is in wire F921-BR(Brown) or in wire T946-PU(Purple) 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 1925 FMI 05. Expected Result:The CID 1925 FMI 05 is active. Results:
YES - The CID 1925 FMI 05 is active. The diagnostic code has not been corrected. The ECM may have failed.Repair: The ECM is unlikely to have failed. Exit this procedure