why does my Tesla Model 3 Original (2017-2023) make a clicking noise when starting

Tesla Model 3 Highland (2024-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

481 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 the clicking noise when starting your Tesla Model 3 (2017-2023). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the high-voltage battery before working on electrical components
•Always wear safety gloves and goggles when handling batteries

Symptoms

•Clicking noise when the vehicle attempts to start
•Dashboard lights flickering
•No engine start or cranking sound
•Possible error message on the display
•Reduced battery range or warnings related to battery health

Diagnostic Steps

1
Inspect the 12V battery voltage using a multimeter to check if it is within the normal range (12.4V - 12.7V)
2
Check battery connections for corrosion or loose terminals
3
Use an OBD-II scanner to check for any fault codes related to the starting system
4
Inspect the main battery contactors for proper operation and connection
5
Verify the software is up to date to rule out any software-related issues

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

•Multimeter
•OBD-II scanner
•Socket set
•Wire brush

Parts Required

•Replacement 12V battery (if needed)
•Battery terminals (if corrosion is severe)

Related Faults

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Diagnostic Steps

1
Inspect the 12V battery voltage using a multimeter to check if it is within the normal range (12.4V - 12.7V)
2
Check battery connections for corrosion or loose terminals
3
Use an OBD-II scanner to check for any fault codes related to the starting system
4
Inspect the main battery contactors for proper operation and connection
5
Verify the software is up to date to rule out any software-related issues

Solution

1. Preparation

Tools Required: Multimeter, OBD-II scanner, socket set.
Ensure the vehicle is in Park mode and the emergency brake is engaged.
Disconnect the high-voltage battery pack for safety.

2. Inspect and Test the 12V Battery

Sub-steps:
1. Remove the access panel to the 12V battery located in the front trunk.
2. Disconnect the negative terminal first, followed by the positive terminal.
3. Use a multimeter to measure the voltage of the 12V battery.
4. If the voltage is below 12.4V, consider replacing the battery.

3. Clean and Tighten Battery Connections

Sub-steps:
1. Clean the battery terminals using a wire brush to remove any corrosion.
2. Tighten the battery terminal connections securely.
3. Reconnect the positive terminal first, then the negative terminal.

4. Inspect the Main Battery Contactors

Sub-steps:
1. Reconnect the high-voltage battery pack.
2. Access the contactor assembly as per the service manual.
3. Check for any signs of damage or corrosion.
4. Test the contactors with a multimeter to ensure they are functioning correctly.

5. Update Software

Sub-steps:
1. Connect the vehicle to Wi-Fi.
2. Check for any available software updates through the vehicle's settings menu.
3. Install any updates and restart the vehicle.