AccuGrade® GPS Using The CD550A Display (GPS/ATS/Sonic/Cross Slope) Caterpillar

MID 114 - CID 0248 - FMI 12

Usage:

12H AMZ

Conditions Which Generate This Code:

This diagnostic code is recorded when the ECM reads a problem that is internal to the ECM.

The CAT data link is an input and an output of all electronic control modules. The data link is designed to carry communications between all electronic control modules. The data link is not a visible component. The data link consists of internal control circuits and the connecting wire harness.

The possible causes of this diagnostic code are listed below:

The part number for the software of the ECM is incorrect.
The ECM has failed. There are no serviceable parts within the ECM.

Test Step 1. VERIFY THE SOFTWARE PART NUMBERS.

Verify that the software part number for the Machine ECM is correct.

Expected Result:

Consult the Business Unit that is producing the product for the correct configuration for the machine.

Results:

OK - The part number is correct. Proceed to test step 2.
NOT OK - The software part number is NOT correct.
Repair: Install the correct software. If any modules have been replaced, ensure that the correct part number was used.
STOP

Test Step 2. VERIFY THAT THE DIAGNOSTIC CODE IS PRESENT.

Disconnect the J1 and J2 machine harness connectors from the ECM. Clean the contacts of the harness connectors.

Reconnect all harness connectors.

Connect ET.

Turn the key start switch to the ON position.

Operate the machine.

By using ET, determine if CID 0248 FMI 12 is present.

Expected Result:

CID 0248 FMI 12 is NOT present.

Results:

OK - The diagnostic code is not present.
Repair: The problem does not exist at this time. The initial problem was probably caused by a poor electrical connection or a short at one of the harness connectors that was disconnected and reconnected. Resume normal machine operation.
STOP
NOT OK - The diagnostic code is present.
Repair: The diagnostic code has not been corrected. It is unlikely that the ECM has failed. Exit this procedure. Perform this procedure again. If the cause of the diagnostic code is not found, replace the ECM. See Testing and Adjusting, "Module - Replace".
STOP