Pinpoint Test L: The Front Control/Display Interface Module (FCDIM) Illumination Does Not Operate Correctly

Information and Entertainment System

Pinpoint Test L: The Front Control/Display Interface Module (FCDIM) Illumination Does Not Operate Correctly

Normal Operation

The Front Control/Display Interface Module (FCDIM) receives the illumination signal from the Body Control Module (BCM) and dims the illumination based on the position of the dimmer switch. In the event this signal is lost, the FCDIM (Front Control/Display Interface Module) defaults to full nighttime brightness, resulting in a symptom of the FCDIM (Front Control/Display Interface Module) being unable to dim.

This pinpoint test is intended to diagnose the following:

- Backlighting system concern

- FCDIM (Front Control/Display Interface Module)

PINPOINT TEST L : THE FDIM (Front Display Interface Module) ILLUMINATION DOES NOT OPERATE CORRECTLY

L1 CHECK FOR DTC U0140:00

- Carry out the FCDIM (Front Control/Display Interface Module) self-test.

Is DTC U0140:00 present?

Yes
GO to Pinpoint Test P Pinpoint Test P: DTC U0140:00.

No
GO to L2.

L2 CHECK FOR CORRECT FCDIM (Front Control/Display Interface Module) OPERATION

- Disconnect the FCDIM (Front Control/Display Interface Module) connector.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect the FCDIM (Front Control/Display Interface Module) connector and make sure it seats correctly.

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

Is the concern still present?

Yes
INSTALL a new FCDIM (Front Control/Display Interface Module). REFER to Front Controls/Display Interface Module (FCDIM) Front Controls/Display Interface Module (FCDIM). TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.