Pinpoint Test R: The Audio System Does Not Operate Correctly From The Front Controls Interface Module (FCIM)

Information and Entertainment System

Pinpoint Tests

Pinpoint Test R: 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.

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 (if equipped) continue to operate.

B2924 / U0184-U0256:00:

This pinpoint test is intended to diagnose the following:

- Communication network concern
- ACM



PINPOINT TEST R: THE AUDIO SYSTEM DOES NOT OPERATE CORRECTLY FROM THE FCIM

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R1 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 R2.

No
REFER to Information Bus.

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R2 CHECK FOR DTC B2924


- Clear the FCIM DTCs.
- Repeat the FCIM self-test, making sure no FCIM buttons are pressed during the test.
- Is DTC B2924 present?

Yes
INSTALL a new FCIM. REFER to Front Controls Interface Module (FCIM) Front Controls Interface Module (FCIM). TEST the system for normal operation.

No
GO to R3.

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R3 CHECK FOR CORRECT FCIM OPERATION


- Disconnect the FCIM connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the FCIM 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 FCIM. REFER to Front Controls Interface Module (FCIM) Front Controls Interface Module (FCIM). 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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