CAB AS 3840943 - Caterpillar

The CID 0820 diagnostic code is associated with the Keypad Datalink. The FMI 02 diagnostic code means that the Advisor module determines that information on the "keypad data link" is erratic.System Response:This condition causes the keypad to operate erratically or the keypad may not function at all.Test Step 1. INSPECT THE BUTTONS ON THE KEYPAD.
Turn the disconnect switch to the OFF position.
Inspect the buttons for the keypad in order to ensure that the buttons operate smoothly.
Toggle each button on the keypad. Expected Result:The buttons appear to move smoothly.Results:
OK - The buttons appear to move smoothly. Proceed to test step 2.
NOT OK - One or more of the buttons appear to be improperly activated. The face plate of the Advisor module is causing one or more of the buttons to be improperly activated.Repair: Manipulate the buttons in order to ensure smooth operation. If the buttons do not operate smoothly, remove the face plate and reinstall the face plate.STOPTest Step 2. CHECK IF THE DIAGNOSTIC CODE REMAINS.
Turn the disconnect switch and the key start switch to the ON position.
Clear all inactive diagnostic codes.
Operate the machine.
Check the status of CID 0820 FMI 02 diagnostic code. Expected Result:The CID 0820 FMI 02 diagnostic code is NO longer active.Results:
OK - The diagnostic code is NO longer active. The diagnostic code does NOT exist at this time. The initial diagnostic code was probably caused by a poor electrical connection of the buttons for the Advisor.Repair: Resume normal machine operation.STOP
NOT OK - The diagnostic code remains active. The Advisor module may have failed.Repair: Exit this procedure and perform the diagnostic code procedure again. If the problem persists, contact the Technical Communicator at your dealership for a possible consultation with Caterpillar. This consultation may greatly reduce repair time. If the Advisor module needs to be replaced, refer to Troubleshooting, "Electronic Control Module (ECM) - Replace".STOP