why won't my Tesla Model 3 Original (2017-2023) start and just clicks when I turn the key

Tesla Model 3 Highland (2024-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

499 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 starting issues 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 to prevent electric shock.
•Ensure the vehicle is in 'Park' to avoid accidental movement during repair.

Symptoms

•Clicking noise when attempting to start the vehicle
•No engine turnover or cranking sound
•Dashboard lights may illuminate briefly
•Possible 'Power Off' message displayed on the screen
•Reduced battery range indicated on the display prior to the issue

Diagnostic Steps

1
Check the vehicle's key fob battery to ensure it has sufficient charge.
2
Inspect the 12V battery voltage using a multimeter; a reading below 12.4 volts may indicate a weak battery.
3
Use the Tesla app to check for any alerts or notifications regarding battery health or power issues.
4
Verify that the vehicle is in 'Park' mode; the vehicle must be in 'Park' to start.
5
Perform a reset of the vehicle's systems by holding down the two scroll wheels on the steering wheel until the screen reboots.

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
•Basic hand tools

Parts Required

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

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Diagnostic Steps

1
Check the vehicle's key fob battery to ensure it has sufficient charge.
2
Inspect the 12V battery voltage using a multimeter; a reading below 12.4 volts may indicate a weak battery.
3
Use the Tesla app to check for any alerts or notifications regarding battery health or power issues.
4
Verify that the vehicle is in 'Park' mode; the vehicle must be in 'Park' to start.
5
Perform a reset of the vehicle's systems by holding down the two scroll wheels on the steering wheel until the screen reboots.

Solution

1. Preparation

Tools Required: Multimeter, socket set, basic hand tools.
Ensure the vehicle is in a safe and well-ventilated area.
Disconnect the vehicle from any charging source.

2. Inspect and Replace 12V Battery

Locate the 12V battery under the front trunk (frunk) panel.
Remove the frunk cover using a socket set to access the battery.
Disconnect the negative terminal first, followed by the positive terminal to prevent short circuits.
Use the multimeter to confirm the voltage of the battery.
- If the voltage is below 12.4V, proceed to replace the battery.
Remove the old battery by unscrewing any retaining brackets.
Install the new 12V battery, ensuring correct polarity (positive to positive, negative to negative).
Reconnect the terminals, starting with the positive terminal followed by the negative.

3. Test the System

Reconnect the frunk cover and ensure it is secured.
Attempt to start the vehicle again by pressing the brake pedal and using the key fob.
If the vehicle starts, proceed to monitor the battery's performance.