my Tesla Model S Plaid/Refresh (2021-present) blind spot monitoring not working what to check

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

562 words

Problem Statement

Learn how to diagnose and fix blind spot monitoring issues in Tesla Model S Plaid. Step-by-step guide with symptoms, diagnostic steps, and solutions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is in 'Park' and the ignition is off before working on electrical components

Symptoms

•Blind spot monitoring indicator lights do not illuminate
•Warning chimes for blind spot detection are absent
•No visual alerts on the side mirrors when a vehicle is in the blind spot
•Error messages related to the blind spot monitoring system may display on the dashboard
•Reduced or absent functionality in Autopilot features that rely on blind spot detection

Diagnostic Steps

1
Check for any software updates available for the vehicle through the Tesla app or touchscreen
2
Inspect the side mirror sensors for any obstructions or damage (e.g., dirt, ice, or physical damage)
3
Perform a visual inspection of the wiring and connectors associated with the blind spot monitoring system
4
Use the Tesla diagnostic tool to scan for error codes related to the blind spot monitoring system
5
Reset the vehicle’s systems by performing a soft reset of the touchscreen and controllers

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Tesla diagnostic tool
•Microfiber cloth
•Basic hand tools

Parts Required

•Replacement sensors (if defective)
•Wiring harness (if damaged)

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Symptoms

•Blind spot monitoring indicator lights do not illuminate

•Warning chimes for blind spot detection are absent

•No visual alerts on the side mirrors when a vehicle is in the blind spot

•Error messages related to the blind spot monitoring system may display on the dashboard

•Reduced or absent functionality in Autopilot features that rely on blind spot detection

Diagnostic Steps

1
Check for any software updates available for the vehicle through the Tesla app or touchscreen
2
Inspect the side mirror sensors for any obstructions or damage (e.g., dirt, ice, or physical damage)
3
Perform a visual inspection of the wiring and connectors associated with the blind spot monitoring system
4
Use the Tesla diagnostic tool to scan for error codes related to the blind spot monitoring system
5
Reset the vehicle’s systems by performing a soft reset of the touchscreen and controllers

Solution

1. Preparation

Tools Required: Tesla diagnostic tool, microfiber cloth, basic hand tools (if needed).
Ensure the vehicle is parked on a flat surface and turned off.

2. Software Update

Connect the vehicle to Wi-Fi.
Navigate to 'Software' on the touchscreen.
Check for updates and install any pending updates.
Restart the vehicle after the update.

3. Inspect Sensors and Wiring

Locate the blind spot monitoring sensors on the rear side of the vehicle (typically integrated into the side mirrors).
Use a microfiber cloth to clean the sensors gently, removing any dirt or debris.
Visually inspect the wiring harness for any signs of wear, corrosion, or disconnection.
If any damage is detected, replace or repair the affected wiring.

4. Diagnostic Tool Scan

Connect the Tesla diagnostic tool to the vehicle’s OBD-II port.
Run a full system scan to check for any error codes related to the blind spot monitoring system.
Document any error codes for further investigation.

5. Reset System

Perform a soft reset by holding down the two scroll wheels on the steering wheel until the touchscreen reboots.
Verify if the blind spot monitoring system resumes normal operation post-reset.