DTC B1A05 (2017 2018 2019)

DTC B1A05  : High beam support system internal system failure

DTC (Auto High-Beam Control Unit)

NOTE:  If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .

1. Problem verification

   -1. Clear the DTCs with the HDS.

   -2. Turn the vehicle to the OFF (LOCK) mode and then the ON mode.

   -3. Wait for at least 10 seconds.

   -4. Check for DTCs with the HDS.

   DTC Description	DTC
   B1A05 High beam support system internal system failure

   Is DTC B1A05 indicated?

   YES 

   Faulty auto high-beam control unit, replace the rearview mirror .

   NO 

   Intermittent failure, the system is OK at this time.