why does my Tesla Model S Original (2012-2020) make a strange noise when starting?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

546 words

Problem Statement

Learn how to diagnose and fix strange noises during startup 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

•Always disconnect the 12V battery before working on electrical systems.
•Ensure the vehicle is securely lifted before performing inspections underneath the vehicle.

Symptoms

•Strange noise during vehicle start-up
•Possible reduction in power or responsiveness
•Warning messages displayed on the dashboard
•Abnormal vibrations felt through the vehicle
•No noise or delayed start before the vehicle powers up

Diagnostic Steps

1
Inspect the vehicle's 12V battery for proper voltage and connections.
2
Scan the vehicle's onboard computer for any error codes using an OBD-II scanner.
3
Check the status of the electric motor and associated components visually for signs of wear or damage.
4
Listen closely to the type of noise (e.g., grinding, clicking) to narrow down potential issues.
5
Examine the drive unit and its connections for any loose or damaged wiring.
6
Review recent software updates or recalls that may affect vehicle performance.

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

•Socket set
•Torque wrench
•USB drive
•Jack and jack stands
•OBD-II scanner

Parts Required

•12V battery (if replacement is necessary)
•Drive unit wiring harness (if damaged)

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Diagnostic Steps

1
Inspect the vehicle's 12V battery for proper voltage and connections.
2
Scan the vehicle's onboard computer for any error codes using an OBD-II scanner.
3
Check the status of the electric motor and associated components visually for signs of wear or damage.
4
Listen closely to the type of noise (e.g., grinding, clicking) to narrow down potential issues.
5
Examine the drive unit and its connections for any loose or damaged wiring.
6
Review recent software updates or recalls that may affect vehicle performance.

Solution

1. Preparation

Ensure the vehicle is parked on a level surface and in "Park" mode.
Disconnect the 12V battery to prevent any electrical shorts during the inspection.
Gather necessary tools and parts.

2. Inspect and Replace the 12V Battery

Sub-steps:
1. Remove the service cover securing the 12V battery.
2. Disconnect the negative terminal first, followed by the positive terminal.
3. Carefully remove the old battery and replace it with a new, fully charged battery.
4. Reconnect the positive terminal first, then the negative terminal.
5. Replace the service cover and ensure it is secured.
Tools Required:
- Socket set
- Torque wrench (for tightening terminals)

3. Check and Update Software

Sub-steps:
1. Power on the vehicle and navigate to the software settings on the touchscreen.
2. Check for any available software updates and initiate the update process.
3. Follow the on-screen instructions to complete the update.
4. Restart the vehicle after the update is complete.
Tools Required:
- USB drive (if manual update is necessary)

4. Inspect Drive Unit Connections

Sub-steps:
1. Raise the vehicle using a jack and secure it with jack stands.
2. Inspect the drive unit wiring harness for any signs of wear or damage.
3. Tighten any loose connections and ensure all connectors are seated properly.
4. Lower the vehicle and perform a test start to check for noise.
Tools Required:
- Jack and jack stands
- Socket set