Pinpoint Test AH: The Display Screen Is Inoperative

Information and Entertainment System

Pinpoint Tests

Pinpoint Test AH: The Display Screen Is Inoperative

Refer to Wiring Diagram Set 130, Audio System/Navigation for schematic and connector information. Diagrams By Number

Normal Operation

The Audio Control Module (ACM) display screen shows all of the audio system information. The display is part of the ACM and cannot be serviced separately.

This pinpoint test is intended to diagnose the following:

- Audio system concern
- ACM



PINPOINT TEST AH: THE DISPLAY SCREEN IS INOPERATIVE

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AH1 CHECK THE OPERATION OF THE AM/FM AUDIO SYSTEM


- Operate the audio system in radio tuner (AM/FM) mode.
- Does the audio system operate correctly?

Yes
GO to AH2.

No
GO to Symptom Chart - General Audio System. Symptom Related Diagnostic Procedures

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AH2 CHECK THE ACM FOR CORRECT OPERATION


- Ignition OFF.
- Disconnect all the ACM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the ACM 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 ACM. REFER to Audio Control Module (ACM) - Fusion, Milan Audio Control Module (ACM) - Fusion, Milan or Audio Control Module (ACM) - MKZ . 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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