Lost Communication with Antenna Control Module
The infotainment system has lost the antenna / tuner amplifier controller. Radio reception drops, navigation may lose GPS, and connected services can fail.
Affected components
- Antenna module
- Infotainment bus
Common causes
- High likelihood: Antenna module unpowered
- Low likelihood: Gateway module routing CAN messages incorrectly
- Low likelihood: CAN terminating resistor (120 Ω) drifted out of spec
Possible symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.