Pinpoint Test F: The Audio System Does Not Operate Correctly From The Front Controls Interface Module (FCIM)
Information and Entertainment System
Pinpoint Tests
Pinpoint Test F: The Audio System Does Not Operate Correctly From The Front Controls Interface Module (FCIM)
Normal Operation
When a button is pressed on the Front Controls Interface Module (FCIM), a signal is sent over the Medium Speed Controller Area Network (MS-CAN) to the modules in the audio system. For vehicles with navigation, the FCIM is also the customer interface with the HVAC module.
If the FCIM can no longer communicate on the MS-CAN (due to loss of power, ground, etc.), the audio system remains in the operating state it was in prior to the failure. The steering wheel controls continue to operate.
- DTC U0184:00 (Lost Communication With Radio) - set by the FCIM when it is missing status messages from the ACM for greater than 5 seconds with the ignition in the RUN position. If the status message is missing, the FCIM controls may be inoperative for controlling audio system functions.
- DTC U0255:00 (Lost Communication With Front Controls Interface Module "A": No Sub Type Information) - set by the ACM if it is missing status messages from the FCIM for greater than 5 seconds with the ignition in the RUN position. If the status message is missing, the controls on the FCIM are inoperative, as the signal never gets to the designated module.
- DTC U2013:63 (Switch Pack: Circuit / Component Protection Time-Out) - set by the FCIM if a button is detected as active for greater than 3 seconds during the self-test, or for greater than 2 minutes during normal operation. When this occurs, the FCIM disables the button until it detects the button as no longer active.
This pinpoint test is intended to diagnose the following:
- Communication network concern
- FCIM
PINPOINT TEST F: THE AUDIO SYSTEM DOES NOT OPERATE CORRECTLY FROM THE FCIM
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F1 CHECK FOR SCAN TOOL COMMUNICATION WITH THE FCIM AND THE ACM
- Carry out the network test using the scan tool.
- Does the scan tool communicate with both the FCIM and the ACM?
Yes
GO to F2.
No
REFER to Information Bus.
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F2 CHECK FOR DTC U2103:63
- Clear the FCIM DTCs.
- Repeat the FCIM self-test, making sure no FCIM buttons are pressed during the test.
- Is DTC U2103:63 present?
Yes
INSTALL a new FCIM. REFER to Front Controls Interface Module (FCIM) - Without Navigation Front Controls Interface Module (FCIM) - Without Navigation or Front Controls Interface Module (FCIM) - With Navigation Front Controls Interface Module (FCIM) - With Navigation. TEST the system for normal operation.
No
GO to F3.
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F3 CHECK FOR CORRECT FCIM OPERATION
- Disconnect all the FCIM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the FCIM connectors and make sure they seat correctly.
- Operate the system and determine if the concern is still present.
- Is the concern still present?
Yes
INSTALL a new FCIM. REFER to Front Controls Interface Module (FCIM) - Without Navigation Front Controls Interface Module (FCIM) - Without Navigation or Front Controls Interface Module (FCIM) - With Navigation Front Controls Interface Module (FCIM) - With Navigation. CLEAR any DTCs present. 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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