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

Tesla Model 3 Highland (2024-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

487 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 during startup in 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 12V battery before working on electrical components.

Symptoms

•Clicking noise when attempting to start the vehicle
•Dashboard warning lights illuminated
•Failure to start or power on
•Reduced power or unresponsive controls
•Unusual behavior of electrical components (e.g., lights flickering)

Diagnostic Steps

1
Inspect the 12V battery for voltage level using a multimeter.
2
Check the battery terminals for corrosion or loose connections.
3
Scan the vehicle's system for error codes using an OBD-II scanner.
4
Test the main fuses related to the starting system for continuity.
5
Examine the contactor and relay for signs of failure or damage.
6
Check for software updates or issues using the Tesla service menu.

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
•Socket set
•OBD-II scanner
•Wire brush

Parts Required

•12V battery (if replacement is necessary)
•Fuses (as needed)
•Relay (if replacement is necessary)

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Diagnostic Steps

1
Inspect the 12V battery for voltage level using a multimeter.
2
Check the battery terminals for corrosion or loose connections.
3
Scan the vehicle's system for error codes using an OBD-II scanner.
4
Test the main fuses related to the starting system for continuity.
5
Examine the contactor and relay for signs of failure or damage.
6
Check for software updates or issues using the Tesla service menu.

Solution

1. Preparation

Tools Required: Multimeter, socket set, OBD-II scanner
Disconnect the 12V battery to ensure safety during inspection.
Wear safety gloves and goggles.

2. Inspect and Test the 12V Battery

Sub-steps:
1. Remove the battery cover to access the 12V battery.
2. Use a multimeter to measure the voltage; it should be above 12.4 volts for a healthy battery.
3. If the voltage is low, replace the battery with a new one rated for the Tesla Model 3.

3. Clean and Secure Battery Connections

Sub-steps:
1. Disconnect the negative terminal first, then the positive terminal.
2. Clean any corrosion from the terminals with a wire brush or battery cleaner.
3. Reconnect the terminals securely, starting with the positive terminal followed by the negative.

4. Inspect Fuses and Relays

Sub-steps:
1. Locate the fuse box and remove the cover.
2. Check the relevant fuses for continuity using a multimeter.
3. Replace any blown fuses with new ones of the same amperage.
4. Inspect the relay for the starting system and replace if necessary.

5. Update Software (if applicable)

Sub-steps:
1. Connect the vehicle to Wi-Fi.
2. Navigate to the software update section in the vehicle settings.
3. Follow prompts to install any available updates.