B2403moderate severityBody
Blind Spot Monitor Calibration Required
on 2010 Toyota 4Runner 4.0L V6 · 4WD
What this code means
The blind spot monitoring system requires recalibration after sensor replacement or rear body repair.
Symptoms
- BSM system not functioning after repair
- Sensors not detecting vehicles
- False alerts or missed detections
- Calibration warning message
Common causes
- Sensor replaced without calibration
- Rear bumper repair altered sensor alignment
- Rear collision shifted sensor mounting
- Sensor firmware update needed
Diagnostic steps
- Verify sensor mounting alignment
- Perform BSM sensor calibration
- Check for rear body damage affecting sensor angle
- Use manufacturer calibration procedure
- Test system with dynamic road test
Repair notes
Perform blind spot monitor calibration per manufacturer procedure.
Other Body codes on this vehicle
B0001
Driver Frontal Stage 1 Deployment Control
B0002
Driver Frontal Stage 2 Deployment Control
B0003
Passenger Frontal Stage 1 Deployment Control
B0004
Passenger Frontal Stage 2 Deployment Control
B0005
Driver Knee Airbag Deployment Circuit
B0006
Passenger Knee Airbag Deployment Circuit
B0007
Rear Left Side Airbag Deployment Circuit
B0008
Rear Right Side Airbag Deployment Circuit
B0010
Driver Side Airbag Deployment
B0011
Driver Side Airbag Deployment Circuit Open