DTC : B18B4, B1E64

DTC B18B4  : Left Side BSI Radar Unit Dirty

DTC B1E64  : Right Side BSI Radar Unit Dirty

NOTE: 

• Before you troubleshoot, review the general troubleshooting information - Refer to:

  How to Troubleshoot the Blind Spot Information System/Cross Traffic Monitor (2016 2017 2018)  or

  How to Troubleshoot the Blind Spot Information System/Cross Traffic Monitor (2019 2020 2021) .

• DTC B18B4 or DTC B1E64 may store due to environment (including weather, a traffic condition, and the drive situation) or temporary contamination around the rear bumper.

DTC (BSI)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   - 2. Clear the DTC with the HDS.

   Clear DTCs

   - 3. Turn the vehicle to the OFF (LOCK) mode.

   - 4. Turn the vehicle to the ON mode, then wait for at least 5 seconds.

   - 5. Check for DTCs with the HDS.

   DTC Description	DTC
   B18B4 Left Side BSI Radar Unit Dirty
   B1E64 Right Side BSI Radar Unit Dirty

   Are any DTCs indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Go to intermittent failures troubleshooting - Refer to:

   How to Troubleshoot the Blind Spot Information System/Cross Traffic Monitor (2016 2017 2018)  or

   How to Troubleshoot the Blind Spot Information System/Cross Traffic Monitor (2019 2020 2021) .

2. Outside rear bumper check

   -1. Check the outside of rear bumper for snow, ice, dirt, contaminants, or stickers.

   Is it OK?

   YES 

   Go to step 3.

   NO 

   Completely wipe off any dirt or contaminants from the rear bumper.

3. Inside rear bumper check

   -1. From the rear wheel arch, remove the appropriate side of the rear bumper.

   - 2. Check the inside of the rear bumper for snow, ice, dirt, or contaminants. Also, check the appropriate BSI radar unit surface for dirt or contaminants.

   Is it OK?

   YES 

   Replace the appropriate BSI Radar Unit - Removal and Installation .

   NO 

   Clean the inside of the rear bumper for dirt or contaminations around the BSI radar unit.