AP-1000D, AP-1055D, AP-655C, BG-2255C, BG-2455D and BG-260D Asphalt Pavers MID 030 - CID 0263 - FMI 03 Caterpillar

Conditions Which Generate This Code:

Illustration 1	g00530637
Schematic for the sensor power supply

This diagnostic code is recorded when the main display module reads an above normal sensor supply voltage (+8 DCV).

Note: The procedures that are used to troubleshoot this diagnostic code may cause additional diagnostic codes to be logged. Find the cause and repair the cause of this diagnostic code before you troubleshoot any new diagnostic codes.

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

1. Use the 7X-1710 Multimeter Probe in order to check the voltage at the connector for the main display module. Measure the voltage from the contact 24 to the contact 2 (ground). DO NOT disconnect the harness from the module.

Expected Result:

The supply voltage that is measured is 8.0 ± 0.5 DCV.

Results:

• YES - The voltage is 8.0 ± 0.5 DCV. The sensor supply voltage is correct. Verify that the diagnostic code is still present. If the diagnostic code is still present 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 module. See Troubleshooting, "Main Display Module - Replace".

  Stop.

• NO - The voltage is NOT 8.0 ± 0.5 DCV. The sensor supply voltage is NOT correct. Proceed to test step 2.

Test Step 2. CHECK FOR A SHORT TO +BATTERY

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

2. At the machine harness connector for the main display module, measure the voltage from the connector contact 24 to 2 (ground).

Expected Result:

The voltage that is measured should be approximately 0 DCV.

Results:

• YES - The voltage is approximately 0 DCV. The voltage 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 module. See Testing and Adjusting, "Main Display Module - Replace".

  Stop.

• NO - The voltage is NOT approximately 0 DCV. The harness or a sensor has failed. Stop.