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Home >> Fiat >> 2016 >> 500L Lounge >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> (Audio (Radio) - Electrical Diagnostics - 500L) >> DTC Troubleshooting >> B1408-13-Rear Left Audio Speaker Output-Circuit Open >> Theory Of Operation

Theory Of Operation

The radio is provided with a fused Battery and Ground circuit. When the Ignition is turned on, the BCM transmits a wake up signal over the CAN bus to the Radio. The Radio monitors the Speaker circuits for electrical failures.