Warning Lights On? An Expert Guide to Volvo Blind Spot Monitoring System Issues

The Blind Spot Monitoring (BSM) feature is meant to observe traffic within the lane next to you and the lane behind you in order to alert you of approaching vehicles before you attempt to make any lane changes.

It should also be noted that as an electronic system it has a few inherent weaknesses in its structure. These weaknesses include instances where it fails to function properly or displays false warning messages. In most situations the problems can be resolved.

What do the Warning Lights Mean?

The warning lights could include the BSM symbol being steady or flashing or a warning reading showing up on the display for the driver which would be "Blind Spot Information System unavailable." This is because the BSM system works alongside the lane-change and cross-traffic alert systems.

A steady warning light indicates that the system is simply deactivated by the driver. If there is a flash or a warning sign then it means that the system is malfunctioning or the sensors have not detected anything.

Common causes of blind spot system issues

Sensor obstruction - Dirt, salt from the road, mud and ice can get into the radar sensors that are positioned near the rear bumper as well as the side housing parts. A small amount is needed to disrupt detection ability.

Damage to sensors - Parking mishaps can scratch up the sensors or the installation of a new bumper may render them improperly positioned.

Wiring - Issues such as corrosion in wires and loose connections would make communication between the computer and sensors impossible.

Software issues - Bugs and incorrect recalibration after bodywork can render the system inoperable due to errors.

Battery - Voltage drops and weak batteries cause failure in certain electronic systems.

Interference - Too many things stored on the rear bumper as well as additional equipment could make the radar function poorly. Weather conditions such as thick fog, strong precipitation and snow can reduce efficiency and trigger warnings.

DIY Quick Troubleshooting

Clear areas where there are any sensors installed

Inspect the back bumper and side panels where the sensors will be found as part of their housing in the form of a circular seal. Clean out all the dirt on these sensors without damaging them using a gentle cleaning agent with a clean soft fabric.

Inspect vehicle settings

Some features will not work when turned off accidentally. It is advised that you inspect whether Blind Spot Monitoring and other alerts are enabled in the car’s central display and driver menus. Inspect your personal driving profiles.

Turn the engine ON and OFF again

This method will remove temporary errors. The reset will help in initializing the modules in case they have recently undergone a reset or the backup power.

Remove aftermarket blockages

Assuming that you haven't added bike racks, magnetic stickers, large bumper guards and metallic strips so get rid of them and see if the issue disappears. The easy offenders include all trailer hitches and metallic mounts.

When to scan

In case the indicator is not turned off after doing some tests then it makes sense to go ahead with scanning. Fault codes could be retrieved by Volvo mechanics from the Blind Spot Information Module to see if there are any issues with sensors, harnesses, software or settings.

• The fault codes indicate some specific malfunction in a certain sensor, communications error or calibration error.

• When a sensor fails or shorts then a replacement of this particular component becomes necessary.

• After either repairing the bumper or replacing the sensors the calibration procedure must be performed using factory-calibration equipment.

Preventive Maintenance

• Make sure that sensors are regularly cleaned especially during winter.

• Do not wear any metal add-ons to the bumper if they are incompatible.

• Take out everything that blocks data from the body and check if calibration will be needed.

• Make sure to service the Battery or Charging system since they cause intermittent failures if the voltage is too low.

• During repairs always make sure you update the software whenever you can.

Conclusion

Blind Spot Monitoring is one of the most efficient elements of safety offered by your Volvo vehicle and all problems associated with it can be easily solved through either cleaning, resetting or professional diagnosis and calibration. If you want to receive proper service and genuine spare parts then visit our professional Volvo center.

We have access to special diagnostic and calibration tools along with genuine sensors and software. Our service center has everything required to bring your safety systems back to life for your next ride. Get in touch with our Volvo center and book an appointment today and we will ensure that Blind Spot Monitoring works perfectly.

Auto Scandia is one of the most sought-after high-end European car maintenance and repair facility located in Herndon, VA that is having over 40 years of experience in looking after luxury cars like BMW, Mercedes, Porsche, Volkswagen, and Volvo.