Network
generic / SAE
U0185
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.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number1 / 85
Possible causes
- Antenna module unpowered high
- Gateway module routing CAN messages incorrectly low
- CAN terminating resistor (120 Ω) drifted out of spec low
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
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 80–600 €
- Estimated time: 0.5–2 h
- Component: antenna module
- Component: infotainment bus
Sources
References
sae:J2012