DAB Antenna open circuit or short circuit to Ubat
Note! Make sure the battery voltage is above the limit of detection. Restart the system and check is the DTC remains active. Disconnect the DAB antenna power cord (white connector) from the antenna (U26). Inspect all connectors visually. Measure the wiring between ground and signal. The measurement result should be between 8 and 16 V. Disconnect the antenna from the infotainment system. Inspect wire for any broken part or short circuit. Note. Before replacing the infotainment system update to the latest available software.
What you'll see
The infotainment system cannot receive signals from the antenna. Very bad or no reception on the DAB radio.
System reaction
No system-reaction text recorded.
Diagnostic depth
If parameter System_DAB = on and When no DAB Antenna is connected. This fault will be checked during run-time. Note! Antenna supervision only works above 12.6V for the following HW assy: 2490025, 2551941, 2551942.
Antenna malfunction is triggered by any of the following conditions: - Faulty connector - Faulty wire harness - Faulty antenna U26