Blind Spot Information (BSI) System Symptom Troubleshooting Index (Blind Spot Information (BSI) System) (2019 2020 2021)

Symptom	Diagnostic procedure	Also check for
The BSI alert indicator comes on when no other vehicle is in the detectable area (Wrong indication)	Symptom troubleshooting Refer to: Blind Spot Information (BSI) System Symptom Troubleshooting - The BSI alert indicator comes on when no other vehicle is in the detectable area (Wrong indication) .
The BSI does not come on when other vehicles are in the detectable area (No indication)	Symptom troubleshooting Refer to: Blind Spot Information (BSI) System Symptom Troubleshooting - The BSI Does Not Come ON When Other Vehicles Are In The Detectable Area (No Indication) (2019 2020 2021) .
The BSI indicator does not come on	Symptom troubleshooting Refer to: Blind Spot Information (BSI) System Symptom Troubleshooting - The BSI indicator does not come on .
The BSI indicator does not go off	NOTE: If any of the CAN communication failure DTCs are indicated in other systems, troubleshoot the DTC first. Check for open wire or shorted wire in the B-CAN circuit; Between the gauge control module and BSI radar unit (B-CAN_H, B-CAN _L) Check the right and/or left side BSI radar unit power circuit (IG1_BACKUP(VST)) Check the right and/or left side BSI radar unit ground circuit (GND) Do the gauge control module self-diagnostic function .	Refer to the following about the indicator operating condition; How to Troubleshoot - Go to: How to Troubleshoot the Blind Spot Information (BSI) System (2019 2020 2021) Refer to the following about the circuit troubleshooting; Gauge control module connector for inputs and outputs BSI radar unit connector for inputs and outputs BSI system circuit diagram - Go to: Blind Spot Information (BSI) System Circuit Diagram (2019 2020 2021) . Fuse to components index Ground to components index
The buzzer does not sound	Symptom troubleshooting Refer to: Blind Spot Information (BSI) System Symptom Troubleshooting - The buzzer does not sound .
The HDS does not communicate with the BSI system	Symptom troubleshooting Refer to: Blind Spot Information (BSI) System Symptom Troubleshooting - The HDS does not communicate with the BSI system .	Incorrect HDS software.
HDS does not communicate with the BSI radar units or the vehicle	Troubleshoot the DLC circuit Refer to: DLC Circuit Troubleshooting (2019 2020 2021)	Incorrect HDS software. Shorted reference voltage.