AP-1000D, AP-1055D, AP-655C, BG-2255C, BG-2455D and BG-260D Asphalt Pavers MID 030 - CID 0248 - FMI 02 Caterpillar


MID 030 - CID 0248 - FMI 02
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Conditions Which Generate This Code:




Illustration 1g00530708

Schematic for the AVSpare data link

This diagnostic code is recorded when the main display module does not receive expected information. The following example shows a possible diagnostic code. The information from the actual gear status is not being received from other electronic control modules through the AVS data link. The information from the AVS data link indicates the abnormal values in the readout. The possible causes of this diagnostic code are listed below. The causes are listed in order of probability:

  • Poor electrical connection at a machine harness connector

  • The circuit for the AVS data link in the machine harness is shorted to ground.

  • The circuit for the AVS data link in the machine harness is shorted to the +battery.

  • The circuit for the AVS data link in the machine harness is open.

Service Notes: Ensure that the desired diagnostic code (CID and FMI) is on hold. Ensure that the service code indicator shows "SERV CODE".

An electronic control module which uses the AVS data link has failed. If the main display module was recently replaced, see Troubleshooting, "Main Display Module Initialization - Adjust".

Test Step 1. CHECK FOR OTHER CODES.

  1. Check other electronic control modules for a similar diagnostic code. If a similar diagnostic code is found, exit this test. Perform the corresponding procedures for the other diagnostic codes that are shown.

Expected Result:

There are other diagnostic codes that are showing.

Results:

  • YES - Exit this procedure and perform the other procedures for the diagnostic codes that are shown. Stop.

  • NO - There are not any other diagnostic codes that are shown. Proceed to test step 2.

Test Step 2. INSPECT THE HARNESS CONNECTORS.

  1. Turn the disconnect switch to the OFF position.

  1. Inspect the connections for the machine harness that are related to the AVS data link.

  1. Make sure that connectors are clean and tight.

Expected Result:

The machine harness is correct.

Results:

  • OK - The machine harness is correct. Proceed to test step 3.

  • NOT OK - The machine harness is not correct.

    Repair: Repair the machine harness or replace the machine harness.

    Stop.

Test Step 3. CHECK FOR A SHORT TO GROUND.

  1. The disconnect switch remains OFF.

  1. Disconnect the machine harness from all the electronic control modules that use the AVS data link.

  1. At the machine harness connector for the main display module, measure the resistance between frame ground and the AVS data link circuits (contacts 5 and 14).

Expected Result:

The resistance that is measured is less than 5000 ohms.

Results:

  • YES - The resistance is less than 5000 ohms. The machine harness has failed. There is a short between the frame ground and the AVS data link circuit in the machine harness.

    Repair: Repair the machine harness or replace the machine harness.

    Stop.

  • NO - The resistance is greater than 5000 ohms. The harness circuit resistance is correct. Proceed to test step 4.

Test Step 4. CHECK FOR A SHORT TO +BATTERY

  1. The disconnect switch remains OFF.

  1. All related control modules remain disconnected from the machine harness.

  1. At the machine harness connector for the main display module, measure the resistance between the +battery (contact 1) and the AVS data link circuits (contacts 5 and 14).

Expected Result:

The resistance is greater than 5000 ohms.

Results:

  • OK - The resistance is greater than 5000 ohms. The harness circuit resistance is correct. Proceed to test step 5.

  • NOT OK - The resistance is less than 5000 ohms. The machine harness has failed. There is a short between the +battery and the AVS data link circuit in the machine harness.

    Repair: Repair the machine harness or replace the machine harness.

    Stop.

Test Step 5. CHECK FOR AN OPEN HARNESS.

  1. The disconnect switch remains OFF.

  1. All related control modules remain disconnected from the machine harness.

  1. Check the continuity of the AVS data link circuit in the machine harness.

  1. Measure the resistance from the connector of the main display module (contact 5 and 14) to the connector for each of the related electronic control modules.

Expected Result:

The resistance is less than 5 ohms.

Results:

  • YES - The resistance is less than 5 ohms. The AVS data link circuit in the machine harness is correct.

    Repair: It is unlikely that the main display module has failed. Exit this procedure and perform this procedure again. Also, recheck if the diagnostic code indicator is illuminated for this diagnostic code. If the cause of the diagnostic code is not found, replace the main display module. See Troubleshooting, "Main Display Module - Replace".

    Stop.

  • NO - The resistance is greater than 5 ohms. The machine harness has failed. The AVS data link circuit is open in the machine harness.

    Repair: Repair the machine harness or replace the machine harness.

    Stop.

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