HOSE AS 3484854 - Caterpillar

Illustration 1 g02108147
Schematic of the action alarmThis diagnostic code is associated with the action alarm. The FMI 3 means that the Advisor module has determined that the voltage of the alarm circuit is above normal.The possible causes of the diagnostic code are listed below:
The action alarm has failed.
The energize circuit of the action alarm is shorted to the +battery circuit.
The display module has failed. This failure 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 271 FMI 3 is active before performing this procedure.Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.Test Step 1. CHECK THE ALARM.
Disconnect the harness connector from the action alarm.
Use jumpers to connect the respective terminals of the action alarm to a + battery and ground.Expected Result:The backup action alarm sounds when power is applied.Results:
OK - The action alarm sounds when power is applied. The alarm functions properly. Proceed to Test Step 2.
NOT OK - The action alarm does NOT sound. The alarm has failed.Repair: Repeat this Test Step "CHECK THE ALARM" in order to verify the failure of the action alarm. Replace the action alarm. Verify that the new alarm corrects the problem.STOPTest Step 2. CHECK THE ENERGIZE CIRCUIT OF THE ALARM FOR A SHORT TO THE +BATTERY CIRCUIT.
Turn the key start switch and the disconnect switch to the OFF position.
The machine harness connector remains disconnected from the action alarm. Disconnect the machine harness from the display module.
At the machine harness connector for the display module, measure the resistance from contact IC-23 (wire 410-WH) to all contacts that are used in the machine harness connectors for the display module.Expected Result:Each resistance measurement is greater than 5000 ohms.Results:
OK - Each resistance measurement is greater than 5000 ohms. The machine harness is correct. Proceed to Test Step 3.
NOT OK - Each resistance measurement is not greater than 5000 ohms. There is a short in the machine harness for the display module. The short is between IC-23 (410-WH) and the circuit that has a low resistance measurement.Repair: Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK THE HARNESS CONNECTORS
Inspect the contacts of the harness connectors. Clean the contacts of the harness connectors.
Reconnect all harness connectors.
Turn the disconnect switch and the key start switch to the ON position.
Operate the machine.
Determine if the CID 271 FMI 3 is active.Expected Result:The CID 271 FMI 3 is active.Results:
YES - The CID 271 FMI 3 is active. The problem has not been corrected. The display module may have failed.Repair: Failure of the display module is unlikely . Perform this procedure again. If the cause of the diagnostic code is not found, replace the display module. See Troubleshooting, "Electronic Control Module (ECM) - Replace".STOP
NO - The CID 271 FMI 3 is not active. The problem does not exist at this time.Repair: The initial diagnostic code was probably caused by a