Pinpoint Test K: The ACM (Audio Front Control Module) Illumination Is Inoperative Or Does Not Dim

Refer to AUDIO SYSTEM/NAVIGATION for schematic and connector information.
Normal Operation and Fault Conditions

REFER to: Instrument Panel and Interior Switches Illumination - System Operation and Component Description .

Possible Sources
- Communication network concern
- Wiring, terminals or connectors
- ACM

K1 PERFORM A NETWORK TEST

Ignition ON.

Using a diagnostic scan tool, perform a network test.

Does the ACM pass the network test?

Yes

GO to K2

No	DIAGNOSE a concern with the network. REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

K2 CHECK FOR CORRECT ACM (AUDIO FRONT CONTROL MODULE) OPERATION

Disconnect and inspect all ACM and related in-line connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect the ACM and related in-line connectors and all previously disconnected illumination system connectors. Make sure all connectors seat and latch correctly.

Operate the system to determine if the concern is still present.

Is the concern still present?

Yes	CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new ACM. REFER to: Audio Front Control Module (ACM)

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.