AP-1000D, AP-1055D, AP-655C, BG-2255C, BG-2455D and BG-260D Asphalt Pavers MID 030 - CID 0821 - FMI 04 Caterpillar


MID 030 - CID 0821 - FMI 04
`

Conditions Which Generate This Code:




Illustration 1g00928894

Schematic for a typical display power supply AP-655C




Illustration 2g01112818

Schematic for a typical display power supply AP-1000D, AP-1055D

This diagnostic code is recorded when the main display module reads the voltage of the display power supply circuit and the voltage is below normal. Normal display power supply voltage is 9.0 ± 0.5 DCV. The schematic that is shown above represents a typical installation of the component. Verify the connector contact and the wire numbers by utilizing the Electrical System Schematic for the machine that is being serviced.

Test Step 1. CHECK THE VOLTAGE AT THE MAIN DISPLAY MODULE.

  1. DO NOT disconnect the harness from the module.

  1. Use the 7X-1710 Multimeter Probe Group. Check the voltage at the connector for the main display module. Measure the voltage from contact 34 to contact 2 (ground).

Expected Result:

The voltage measures 9.0 ± 0.5 DCV.

Results:

  • OK - The voltage is 9.0 ± 0.5 DCV. The display power supply voltage is correct. Check the main display module for the same diagnostic code. If the service code indicator is still ON, the main display module has failed.

    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.

  • NOT OK - The voltage is NOT 9.0 ± 0.5 DCV. The display power supply voltage is NOT correct. Proceed to test step 2.

Test Step 2. DISCONNECT THE MODULES.

  1. Use the 7X-1710 Multimeter Probe Group. Check the voltage at the connector for the main display module. Measure the voltage from contact 34 to contact 2 (ground).

  1. Disconnect a display module from the machine harness one at a time.

  1. Continue to measure the voltage at the connector for the main display module. Measure the voltage from contact 34 to contact 2.

Expected Result:

The voltage that is measured is 9.0 ± 0.5 DCV.

Results:

  • OK - The voltage is 9.0 ± 0.5 DCV. The power supply to the module is correct. The module that was just disconnected has failed.

    Repair: Replace the module that was disconnected.

    Stop.

  • NOT OK - The voltage is NOT 9.0 ± 0.5 DCV. The display power supply voltage is not correct. Repeat this test step again. All the modules have been disconnected from the machine harness and the voltage is NOT 9.0 ± 0.5 DCV. Proceed to test step 3.

Test Step 3. CHECK FOR A SHORT TO GROUND.

  1. Turn the disconnect switch and the key start switch to the OFF position.

  1. Disconnect the machine harness from the main display module.

  1. At the machine harness connector for the main display module, measure the resistance. Measure the resistance between harness connector contact 34 and harness connector contact 2.

Expected Result:

The resistance that is measured is greater than 5000 ohms.

Results:

  • OK - The resistance that is measured is greater than 5000 ohms. Stop.

  • NOT OK - The resistance is less than 5000 ohms. The harness has failed.

    Repair: Repair the harness or replace the harness.

    Stop.

Information System:

AP-1000D, AP-1055D, AP-655C, BG-2255C, BG-2455D and BG-260D Asphalt Pavers MID 030 - CID 0821 - FMI 03
AP-655C and BG-2255C Asphalt Pavers Propel System Piston Pump Flow - Test
AP-1000D, AP-1055D, AP-655C, BG-2255C, BG-2455D and BG-260D Asphalt Pavers MID 030 - CID 0819 - FMI 02
IT38G Series II Integrated Toolcarrier and 938G Series II Wheel Loader Visual Inspection
IT38G Series II Integrated Toolcarrier and 938G Series II Wheel Loader Operational Checks (Hydraulic System)
AP-1000D, AP-1055D, AP-655C, BG-2255C, BG-2455D and BG-260D Asphalt Pavers MID 030 - CID 0600 - FMI 04
3524B Engine for Caterpillar Built Machines Camshaft - Remove
773D, 773E, 775D and 775E Off-Highway Trucks Machine Systems Summary of Revisions
Product Link 151/201 Reference Parts Information
TK711, TK721, TK722 and TK732 Track Feller Bunchers Hydraulic System Parking Brake (Travel)
AP-1000D, AP-1055D, AP-655C, BG-2255C, BG-2455D and BG-260D Asphalt Pavers MID 030 - CID 0324 - FMI 06
AP-1000D, AP-1055D, AP-655C, BG-2255C, BG-2455D and BG-260D Asphalt Pavers MID 030 - CID 0324 - FMI 05
3054E Industrial Engine Introduction
3524B Engine for Caterpillar Built Machines Camshaft - Install
D350E and D400E Articulated Trucks Power Train Center Axle
G3304 and G3306 Engines Visual Inspection
14H and 16H Motor Graders Power Train Introduction
AP-1000D, AP-1055D, AP-655C, BG-2255C, BG-2455D and BG-260D Asphalt Pavers Monitoring System - Self Test
Installation of New Restriction Orifice for the Unit Injector Pump
AP-1000D, AP-1055D, AP-655C, BG-2255C, BG-2455D and BG-260D Asphalt Pavers Electrical Connector - Inspect
3054E Industrial Engine Basic Engine
AP-1000D, AP-1055D, AP-655C, BG-2255C, BG-2455D and BG-260D Asphalt Pavers Main Display Module Initialization - Adjust
Installation Instructions for the Machine Security System on the Small Wheel Loaders{7631}
3524B Engine for Caterpillar Built Machines Accessory Drive (Front) - Remove