Pinpoint Test 10: An Individual Front Display Interface Module (FDIM) Display Is Inoperative/Does Not Operate Correctly
PINPOINT TEST 10: AN INDIVIDUAL FRONT DISPLAY INTERFACE MODULE (FDIM) DISPLAY IS INOPERATIVE/DOES NOT OPERATE CORRECTLY
Normal Operation
The front display interface module (FDIM) receives inputs from multiple modules, and displays that information on the screen. The input is in the form of a message delivered via the medium speed controller area network (MS-CAN).
- DTC U0155 (Lost Communication With Instrument Panel Cluster [IC] Control Module) - sets when the compass heading message is not received by the FDIM for greater than 5 seconds. When this message is missing, the FDIM will not display compass information.
- DTC U0184 (Lost Communication With Radio [ACM]) - sets when the audio control module (ACM) status message is not received by the FDIM for greater than 5 seconds. When this message is missing, the FDIM will not display audio information.Any of these DTCs can be set when the vehicle experiences a low battery voltage condition, which should also set DTC B1318 in at least one module. The low battery voltage condition must be corrected before an accurate diagnosis of a missing message can be made.Also, if there are no symptoms present, these DTCs can be ignored.
Possible Causes
- Interior lamps system concern
- Audio system concern
- FDIM
Diagnostic Procedure
CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
