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Diagnostic Routine U




Diagnostic Routine U

Diagnostic Overview

One Or More FCDIM Displays Is Inoperative Or Does Not Operate Correctly

Normal Operation and Fault Conditions

All of the displays on the FCDIM (Front Control/Display Interface Module) screen are controlled through network messages. The modules sending display data to the FCDIM (Front Control/Display Interface Module) are:
- ACM (Audio Control Module): audio system information
- IPC (Instrument Panel Cluster): warning messages and indicators

If the FCDIM (Front Control/Display Interface Module) loses the signal from any of these modules, only those specific displays are inoperative.

Pinpoint Test

1. CHECK FOR SCAN TOOL COMMUNICATION WITH THE FCDIM (Front Control/Display Interface Module)

1. Using a scan tool, perform the network test.

Does the scan tool communicate with the FCDIM (Front Control/Display Interface Module)?






2. CHECK FOR LOST COMMUNICATION DTCs (Diagnostic Trouble Codes) SET IN THE FCDIM (Front Control/Display Interface Module)

1. Using a scan tool, retrieve all continuous DTCs (Diagnostic Trouble Codes).

Is DTC U0140:00 or U0155:00 present in the FCDIM (Front Control/Display Interface Module)?






3. CHECK THE FCDIM (Front Control/Display Interface Module) DISPLAY SEGMENTS

1. Using a scan tool, view the FCDIM (Front Control/Display Interface Module) PIDs (Parameter Identifications).

2. Command all of the LCD (Liquid Crystal Display) segments on using the FCDIM (Front Control/Display Interface Module) active command LCD_SEG (All LCD (Liquid Crystal Display) Segments).

Do all of the FCDIM (Front Control/Display Interface Module) segments illuminate?






4. CHECK FOR CORRECT FCDIM (Front Control/Display Interface Module) OPERATION

1. Disconnect and inspect the FCDIM (Front Control/Display Interface Module) connector.

2. Repair:

- corrosion (install new connector or terminals- clean module pins)
- damaged pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

3. Reconnect the FCDIM (Front Control/Display Interface Module) connector. Make sure it seats and latches correctly.

4. Operate the system and determine if the concern is still present.

Is the concern still present?