Pinpoint Test D: The Audio Control Module (ACM) Display Screen Is Inoperative - Vehicles With Navigation

Information and Entertainment System

Pinpoint Tests

Pinpoint Test D: The Audio Control Module (ACM) Display Screen Is Inoperative - Vehicles With Navigation

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 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:

- Wiring, terminals or connectors
- ACM



PINPOINT TEST D: THE ACM DISPLAY SCREEN IS INOPERATIVE - VEHICLES WITH NAVIGATION

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

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D1 VERIFY 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 D2.

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

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D2 CHECK FOR CORRECT ACM OPERATION


- Connect: All Disconnected Connectors.
- Disconnect all the ACM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all 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) Audio Control Module (ACM). 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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