my Tesla Model S Original (2012-2020) emits a strange smell while accelerating

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

480 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix strange smells during acceleration in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the vehicle to cool before inspecting components to prevent burns.

Symptoms

•Strange or burnt smell while accelerating
•Reduced acceleration power
•Warning messages on the dashboard
•Increased heat in the cabin
•Possible electrical burning smell

Diagnostic Steps

1
Inspect for any visible damage or burnt components under the hood, especially around the electrical connections and battery.
2
Check for any error codes using an OBD-II scanner or Tesla-specific diagnostic tool.
3
Evaluate the battery temperature and performance through the vehicle's onboard diagnostics.
4
Inspect the motor for any signs of overheating or mechanical failure.
5
Check the condition of wiring harnesses and connectors for fraying or short circuits.

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
•Multimeter
•Socket set
•Torque wrench
•Inspection mirror
•Flashlight

Parts Required

•Replacement wiring and connectors (if damaged)
•New motor (if necessary)

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Diagnostic Steps

1
Inspect for any visible damage or burnt components under the hood, especially around the electrical connections and battery.
2
Check for any error codes using an OBD-II scanner or Tesla-specific diagnostic tool.
3
Evaluate the battery temperature and performance through the vehicle's onboard diagnostics.
4
Inspect the motor for any signs of overheating or mechanical failure.
5
Check the condition of wiring harnesses and connectors for fraying or short circuits.

Solution

1. Preparation

Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, inspection mirror, flashlight.
Disconnect the vehicle's battery to ensure safety while inspecting electrical components.

2. Inspect Electrical Components

Sub-steps:
1. Remove the battery cover using a socket set.
2. Visually inspect all wiring and connectors for signs of melting, burning, or corrosion.
3. Use a multimeter to check for continuity in critical wiring and connections.

3. Check Motor and Battery

Sub-steps:
1. Disconnect the motor connections and inspect for overheating.
2. Measure the resistance of the motor windings to ensure they are within specifications.
3. If the battery is overheating, consider consulting a professional for battery health assessment.

4. Repair or Replace Damaged Components

Sub-steps:
1. Replace any damaged wiring or connectors identified during the inspection.
2. If the motor shows signs of failure, remove it using the socket set and replace it with a new or refurbished unit.
3. Reinstall the battery cover securely and reconnect the battery.

5. Finalize Repair

Sub-steps:
1. Recheck all connections and components to ensure everything is secure.
2. Reconnect the battery and perform a systems check.
3. Test drive the vehicle to confirm the issue has been resolved.