Pinpoint Test M: The ACM (Audio Front Control Module) Illumination Is Inoperative Or Does Not Dim
- Refer to Audio System/Navigation - Navigator
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
- M1 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 M2 No DIAGNOSE a concern with the network. REFER to: Controller Area Network (CAN) Module Communications Network . - M2 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: Information and Entertainment System - Component Location . 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.