Pinpoint Test I: An Individual Front Display Interface Module (FDIM) Display Is Inoperative (Vehicles Without Navigation)
Information and Entertainment System
Pinpoint Tests
Pinpoint Test I: An Individual Front Display Interface Module (FDIM) Display Is Inoperative (Vehicles Without Navigation)
Normal Operation
The Front Display Interface Module (FDIM) receives inputs via the Medium Speed Controller Area Network (MS-CAN) from the following modules:
- Audio Control Module (ACM): audio system information
- Instrument Panel Cluster (IPC): compass heading information
- Accessory Protocol Interface Module (APIM): SYNC system information
- HVAC module: climate control system information
If the FDIM loses the signal from any of these modules, only that specific display is inoperative.
For the compass display, this pinpoint test is intended to diagnose a concern of the compass display being blank. For any other concerns with the compass display, including the compass being inaccurate, refer to Compass.
U0155-U0256:
This pinpoint test is intended to diagnose the following:
- Communication network concern
- FDIM
PINPOINT TEST I: AN INDIVIDUAL FDIM DISPLAY IS INOPERATIVE (VEHICLES WITHOUT NAVIGATION)
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I1 OBSERVE THE FDIM DISPLAY
- Turn the audio system on and observe the FDIM screen.
- Is the FDIM display completely inoperative?
Yes
Go To Pinpoint Test G. Pinpoint Test G: The Front Display Interface Module (FDIM) Is Completely Inoperative (Vehicles Without Navigation)
No
GO to I2.
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I2 CHECK THE FDIM DISPLAY SEGMENTS
- Enter the following diagnostic mode on the scan tool: Audio Display Test.
- Follow the scan tool instructions to carry out the Audio Display Test.
- Do all of the FDIM segments illuminate?
Yes
GO to I3.
No
GO to I4.
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I3 OBSERVE THE SPECIFIC INOPERATIVE DISPLAY
- Observe the inoperative FDIM display while carrying out the indicated diagnostic method as follows:
- Does the inoperative display confirm the expected results?
Yes
The system is operating correctly at this time. INFORM the customer on the operation of the FDIM displays.
No
If the compass heading is inaccurate or indicates a calibration error, REFER to Compass to continue diagnosis of the compass.
For all other concerns, GO to I4.
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I4 CHECK FOR LOST COMMUNICATION DTCs
- Ignition ON.
- Clear continuous DTCs from all modules.
- Ignition OFF.
- Ignition ON.
- Wait at least 10 seconds.
- Carry out the FDIM self-test.
- Is DTC U0155, U0164, U0184, or U0197 present?
Yes
GO to I5.
No
GO to I6.
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I5 CHECK FOR SCAN TOOL COMMUNICATION WITH THE TRANSMITTING MODULE
- Carry out the network test using the scan tool.
- Does the scan tool communicate with the IPC, the ACM, the APIM, and the HVAC module?
Yes
GO to I6.
No
REFER to Information Bus.
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I6 CHECK FOR CORRECT FDIM OPERATION
- Ignition OFF.
- Disconnect the FDIM connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the FDIM 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 FDIM. REFER to Front Display Interface Module (FDIM) - Without Navigation Front Display Interface Module (FDIM) - Without Navigation.
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.
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