how to fix Tesla Model 3 Original (2017-2023) that won’t start and just clicks?

Tesla Model 3 Highland (2024-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

452 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 a Tesla Model 3 that won't start and just clicks. 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 systems.
•Allow the vehicle to cool before performing any work on the battery.

Symptoms

•Clicking noise when the ignition is attempted
•Dashboard lights flickering or dim
•No response from the vehicle's power systems
•Possible 'Battery Low' warning displayed on the screen
•Unable to engage the drive mode

Diagnostic Steps

1
Check the 12V battery voltage using a multimeter.
2
Inspect the connections to the 12V battery for corrosion or looseness.
3
Verify the state of charge of the main battery pack using the vehicle’s display.
4
Attempt to jump-start the 12V battery with an external power source.
5
Use a diagnostic tool to check for any error codes in the vehicle's system.

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
•Wrench set
•Jumper cables

Parts Required

•New 12V battery (specific to Tesla Model 3)

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Diagnostic Steps

1
Check the 12V battery voltage using a multimeter.
2
Inspect the connections to the 12V battery for corrosion or looseness.
3
Verify the state of charge of the main battery pack using the vehicle’s display.
4
Attempt to jump-start the 12V battery with an external power source.
5
Use a diagnostic tool to check for any error codes in the vehicle's system.

Solution

1. Preparation

Tools Required: Multimeter, socket set, wrench set, jumper cables.
Ensure the vehicle is in a safe location and the parking brake is engaged.

2. Check and Replace 12V Battery

Sub-steps:
1. Open the front trunk (frunk) and locate the 12V battery.
2. Disconnect the negative (-) terminal first, followed by the positive (+) terminal.
3. Remove the old 12V battery using a socket set.
4. Install the new 12V battery by connecting the positive (+) terminal first, followed by the negative (-) terminal.
5. Ensure all connectors are tightened and secure.

3. Inspect and Clean Battery Connections

Sub-steps:
1. Clean any corrosion from the battery terminals using a mixture of baking soda and water.
2. Use a wire brush to scrub the terminals and connectors until clean.
3. Rinse with water and dry thoroughly before reconnecting.

4. Reset Vehicle Systems

Sub-steps:
1. Once the new battery is installed, perform a system reset by holding down the brake pedal and pressing and holding the steering wheel scroll buttons until the screen reboots.
2. Wait for the display to restart and check if the vehicle starts normally.