SPRING 5362663 - Caterpillar

New Sensor Not Appearing on the DCU
In the DCU "Troubleshooting" screens, verify that the newly installed sensor is appearing in the appropriate list and showing a value. The sensor should appear under the "Voltage Sensor" troubleshooting menu.If the sensor is not displayed in the list, refer to the Programming Guide, LEBM0063, "Cat A&P Controls Programming Guide".SPN Displayed With No Description
If the alarm list displays an SPN number without a description, ensure the following:
Check that the DCU firmware is up-to-date. If the DCU has outdated firmware, download the latest firmware on SIS web (sisweb.cat.com).
Check if the device has an unrecognized SPN. If a device has been added to the engine/genset with an unrecognized SPN, the customer can submit a request through the Dealer Solutions Network(DSN) to add a new SPN to the DCU firmware.New DCU Configuration File Does Not Appear
If a new DCU configuration file has been loaded and does not appear after rebooting, update the firmware on the DCU. The configuration file was built on firmware that is newer than what is on the DCU.DCU Displays Different Screens or Missing Information
If the DCU displays different screens or is missing information, check the configuration file on the DCU. If the customer has a genset, the configuration file could be a prop file. The same applies to a prop engine. If a genset configuration file has been uploaded to the DCU instead of a prop file, the display will have incorrect or missing information. Use the following steps to find the configuration file on the DCU.
Illustration 1 g06034909
Finding the configuration file
From the "Menu" screen, select the "Help" option.
Select "Version Information". The configuration file will be the bottom line. Refer to Illustration 1.New J1939 Device Does Not Appear on the DCU
Check the DCU programming if a new J1939 device has been added but is not appearing on the DCU. The DCU must be programmed for each J1939 device. Refer to the Programming Guide, LEBM0063, "Cat A&P Controls Programming Guide" for information on programming the DCU.DCU Widgets Display Blank Information
If only some widgets are displaying "- - - -", ensure the following are broadcasting J1939 information
The Engine ECM
The RTD module
CDVR
If most widgets are displaying "- - - -" and the alarm shows "J1939 Bus Disabled", do the following:
Acknowledge the alarm to reset the DCU. Recheck the widgets.
If widgets are still displaying "- - - -", check for damaged or unplugged wiring. Check the resistor at X4 (Schematic - 17R16), and DCU connector #1.Note: The MECPII can have Engine ECM and Powertrain controls. The MGCPII can have controls such as the Engine ECM , PAM, CDVR, and RTD.Jacket Water Heater Control Does Not Work
If the engine speed is greater than "Low Idle", the jacket water heater should be off.
Ensure that the HTC Expansion Water Tank Level is closing. With a multimeter, ensure that there is 24V from the panel on