Jeep Grand Cherokee Blind Spot Detection Not Working

When your trusty sidekick, the Blind Spot Detection system in your Jeep Grand Cherokee, starts giving you the silent treatment, it’s not just frustrating—it’s a safety concern. You rely on this feature to alert you of vehicles lurking in those hard-to-see areas while you navigate busy roads. If it’s not working, you’re missing critical information that could prevent a collision.

Common symptoms of a malfunction include no alert when a vehicle is in your blind spot or false alarms when there’s nothing there. The cause might be as simple as dirt on a sensor or as complex as a misaligned radar.

Before you head to the mechanic, check the basics: ensure your sensors are clean and your system settings are correct. If the problem persists, it’s time to consider professional diagnosis and repair to get your blind spot detection back in action.

Key Takeaways

  • The blind spot monitoring system in the Jeep Grand Cherokee alerts you of vehicles in blind spots using radar sensors.
  • Malfunctions in the system can be caused by sensor misalignment, dirt accumulation, or damage to outside mirrors.
  • Common failure symptoms include error messages, intermittent activation of warning lights, and complete shutdown of alerts.
  • Troubleshooting steps include inspecting the rear bumper, using a scan tool to monitor data communication, checking connections and cleaning radar sensors, and visiting a Jeep Dealership for professional diagnosis and recalibration.

Understanding Blind Spot Monitoring

While you’re driving, the blind spot monitoring system in your Jeep Grand Cherokee works tirelessly to alert you of vehicles that may be hidden in your blind spots. Utilizing advanced radar sensors, the system scans the areas beside and just behind your vehicle.

If a car enters these zones, the blind spot sensors trigger a warning. You’ll notice blind spot alerts, usually in the form of illuminated icons on your side mirrors or an auditory signal, to caution you.

When the Blind Spot Detection malfunctions, it’s often due to issues such as sensor misalignment or dirt accumulation. Addressing these problems typically involves cleaning the sensors or ensuring they’re correctly positioned. For persistent blind spot system issues, recalibration or professional technical support may be required to restore your blind spot assist functionality.

Common Failure Symptoms

In light of the crucial role your Jeep Grand Cherokee’s blind spot monitoring system plays, you’ll quickly notice when something’s amiss, such as a sudden lack of alerts or erratic warning lights on your mirrors.

  • Error Messages & Alerts
  • Blind Spot Alert Unavailable’: This error message on your dashboard indicates potential electrical issues or obstructions affecting the rear sensors.
  • Intermittent Activation: Unpredictable behavior of the warning lights could point to a faulty blind spot module.
  • Complete Shutdown: No alerts or lights suggest a system failure.
  • Physical Damage
  • Collision Impact: Damage to the side rear mirrors may disrupt the system’s functionality.
  • Diagnostic Indicators
  • Check Engine Light: Could illuminate due to related electrical issues impacting the blind spot detection system.

Addressing these symptoms promptly can safeguard the comprehensive safety features of your Jeep Grand.

Potential Causes of Malfunction

You’ll find that a malfunctioning blind spot detection system in your Jeep Grand Cherokee can stem from a variety of issues, ranging from painted-over sensors to faulty wiring.

If the sensors on your bumper were inadvertently covered with paint during reassembly, this could interfere with the radar signals necessary for the blind spot system to function accurately.

Damage to the outside mirrors, perhaps from a collision, might’ve compromised the system’s integrity.

It’s also crucial to confirm whether the right rear blind spot module was correctly replaced, as any fault here could trigger an ‘Unavailable Wipe Rear’ or ‘Service required’ message.

Additionally, if the sensors were misplaced or improperly mounted after bodywork, this could lead to persistent blind spot indicator problems.

Step-by-Step Troubleshooting Guide

Begin your troubleshooting process by checking the dashboard for any error messages that may indicate a problem with the blind spot detection system.

Inspect the rear bumper:

  • Look for ‘Blind Spot Assist Unavailable’ messages.
  • Check for obstructions or dirt on the sensors.
  • Examine for signs of damage or incorrect paintwork.

Utilize a scan tool:

  • Monitor data communication from the right rear blind spot module.
  • Drive and scan simultaneously to identify intermittent issues.

Check connections and power sources:

  • Reattach the door harness if necessary.
  • Clean the radar sensors carefully.
  • Ensure fuses and relays are properly seated.

If these steps don’t resolve the issue, it’s time to visit a Jeep Dealership for professional diagnosis and potential recalibration.

Professional Repair Options

If your Jeep Grand Cherokee’s blind spot detection remains faulty after basic troubleshooting, a certified mechanic should be your next stop for a comprehensive repair.

Your professional technician will inspect the system, focusing on the right rear and left side sensors that may have sustained damage or misalignment. They’ll check the part numbers to ensure compatibility and the absence of internal electrical faults.

Repair options may include recalibration of the system or replacement of faulty modules.

When you drive the vehicle to the shop, the mechanic can also perform a dynamic test, scanning data in real time to pinpoint communication loss or erratic sensor behavior.

Trusting a professional’s technical expertise ensures your Grand Cherokee’s blind spot detection is restored to its optimal functionality.

Preventative Maintenance Tips

To keep your Jeep Grand Cherokee’s blind spot detection system in top condition, it’s crucial to perform regular maintenance checks and cleanings. Here’s how to ensure your system remains reliable:

Regularly Check and Clean Radar Sensors

  • Locate sensors on the right and left sides, near the tail light and quarter panel.
  • Remove obstructions such as dirt or excessive paint.
  • Gently wipe the sensor surface with a soft cloth.

Ensure Sensor Placement and Mounting

  • Post-body work, verify sensors are aligned and properly mounted on the front bumper.
  • Check for secure fittings* to prevent misalignment and electrical issues.

Check Fuses and Relays

  • Locate and reseat fuses and relays related to the blind spot system.
  • Ensure connections are snug to avoid sensor failures.

Avoid aftermarket accessories that may obstruct the sensors, and seek professional assistance for recalibration when needed.


In conclusion, you’ve now grasped the intricacies of your Jeep Grand Cherokee’s Blind Spot Monitoring system. If it’s acting up, you know the symptoms to watch for and the potential culprits behind the malfunctions.

Follow the troubleshooting steps diligently, but don’t hesitate to seek professional help for complex issues or recalibration. Stick to regular maintenance to minimize future glitches.

With your proactive approach, you’ll enhance your system’s reliability and your on-road safety.

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