Diagnostic Aids
- If DTC B390A 58 is set, check for anything that can interfere with the radar signal. Verify area in front of radar is clean of mud, ice, snow, etc. Also verify the fascia panels in front of the radar are damage-free and not obstructed by any add-on accessories such as emblems, etc.
- Once the vehicle fascia is clean, unobstructed, and damage free, and B390A 58 is still active, it means radar sensor has declared a blockage condition and has not been able to clear it until certain conditions are met. It is necessary to test drive the vehicle to a speed greater than 9 km/h (6 mph) and allow the radar sensor to be exposed to other vehicles and traffic in the direction of the radar sensor field of view. Usually, a short drive in real life conditions will allow the radar sensor to clear the B390A 58 blockage condition.
- The B233 Radar Sensor Module - Short Range modules cannot be swapped from side to side once they have been installed. Failure type byte 67 can occur if a module is reinstalled on the incorrect side of the vehicle.