my Tesla Model S Original (2012-2020) blind spot monitoring not working what should I check

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

550 words

Problem Statement

Learn how to diagnose and fix blind spot monitoring issues in Tesla Model S (2012-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components to prevent shock.

Symptoms

•Blind spot warning indicators not illuminating
•Alerts not sounding when vehicles are in blind spot
•Display screen shows error message related to blind spot monitoring
•System intermittently fails to activate
•Reduced visibility or false activation of alerts

Diagnostic Steps

1
Check the vehicle's software version to ensure it is up to date.
2
Inspect the side mirror sensors for dirt, debris, or damage.
3
Scan the vehicle with a diagnostic tool to check for any error codes related to the blind spot monitoring system.
4
Verify the settings in the vehicle's touchscreen to ensure blind spot monitoring is enabled.
5
Test the system by driving in various conditions to see if it activates correctly.

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

•OBD-II scanner
•Soft cloth
•Glass cleaner
•Trim removal tool

Parts Required

•Blind spot monitoring sensors (if replacement is necessary)

Related Faults

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Diagnostic Steps

1
Check the vehicle's software version to ensure it is up to date.
2
Inspect the side mirror sensors for dirt, debris, or damage.
3
Scan the vehicle with a diagnostic tool to check for any error codes related to the blind spot monitoring system.
4
Verify the settings in the vehicle's touchscreen to ensure blind spot monitoring is enabled.
5
Test the system by driving in various conditions to see if it activates correctly.

Solution

1. Preparation

Ensure the vehicle is parked on a level surface and the ignition is off.
Gather necessary tools and parts before starting the repair.

2. Update Software

Connect the vehicle to a Wi-Fi network.
Access the vehicle settings via the touchscreen.
Navigate to the "Software" section and check for updates.
Follow the prompts to install any available software updates.

3. Inspect and Clean Sensors

Locate the blind spot sensors embedded in the side mirrors.
Use a soft cloth and appropriate glass cleaner to gently clean each sensor.
Inspect the sensors for physical damage or misalignment.

4. Scan for Error Codes

Use an OBD-II scanner compatible with Tesla vehicles.
Connect the scanner to the vehicle's diagnostic port.
Record any error codes related to the blind spot monitoring system.
Refer to the Tesla service manual for further troubleshooting based on the error code.

5. Verify System Settings

Access the vehicle settings from the touchscreen.
Navigate to the "Autopilot" or "Safety" settings.
Ensure that the blind spot monitoring feature is turned on.

6. Replace Sensors (if necessary)

If sensors are found to be damaged or malfunctioning:
- Disconnect the battery to ensure safety during repairs.
- Remove the side mirror covers using a trim removal tool.
- Unplug the faulty sensor and replace it with a new one.
- Reassemble the mirror cover and reconnect the battery.