12V Out3 Short Circuit To Gnd
Disconnect the connector from the subwoofer and check if the DTC remains active. Check the harness between the subwoofer (N16) and the infotainment system for a short circuit to GND. If it becomes passive then check if the subwoofer has an internal short circuit. Note. Before replacing the infotainment system update to the latest available software.
What you'll see
The subwoofer (N16) doesn't work properly since it doesn't receive any signal from the infotainment system (pin E12).
System reaction
External peripheral connected to this line will not work
Diagnostic depth
If the parameter System_Subwoofer = on and When 12V Out3 Line is short circuited to Gnd, provided 12V Out3 Line should be "HIGH". This fault will be checked in run-time but once the fault is SET the digital out line will be disabled. So, scanning of this fault will be stopped for that power cycle and again scanning of fault starts in the next power cycle.
Short Circuit To Gnd