The BSI alert indicator comes on when no other vehicle is in the detectable area (Wrong indication)

Symptom troubleshooting.

The BSI does not come on when other vehicles are in the detectable area (No indication)

Symptom troubleshooting.

The BSI indicator does not go off, or does not come on

The buzzer does not sound

The HDS does not communicate with the BSI system

Symptom troubleshooting.

Incorrect HDS software.

HDS does not communicate with the BSI radar units or the vehicle

Troubleshoot the DLC circuit.