AM/FM 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 AM/FM 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 AM/FM radio.
System reaction
No system-reaction text recorded.
Diagnostic depth
When No AMFM Antenna is connected and if the paramter "System_AM_FM_FM2 Antenna Type" = Active. 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