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

465 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 battery before working on electrical systems.
•Use caution when handling the battery, as it contains acid.

Symptoms

•Clicking noise when attempting to start the vehicle
•No engine turnover or cranking
•Dashboard lights dimming or flickering
•Potential loss of power to accessories
•"Ready to Drive" indicator light not illuminated

Diagnostic Steps

1
Check the 12V battery voltage using a multimeter.
2
Inspect the 12V battery connections for corrosion or loose terminals.
3
Scan for any error codes using a Tesla diagnostic tool.
4
Ensure the vehicle is in 'Park' mode and that the key fob is functioning properly.
5
Examine the main battery connections for any signs of damage or loose connections.
6
Test the starter relay to ensure it is functioning correctly.

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
•Wire brush
•Safety gloves

Parts Required

•Replacement 12V battery (if necessary)
•Starter relay (if defective)

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Diagnostic Steps

1
Check the 12V battery voltage using a multimeter.
2
Inspect the 12V battery connections for corrosion or loose terminals.
3
Scan for any error codes using a Tesla diagnostic tool.
4
Ensure the vehicle is in 'Park' mode and that the key fob is functioning properly.
5
Examine the main battery connections for any signs of damage or loose connections.
6
Test the starter relay to ensure it is functioning correctly.

Solution

1. Preparation

Gather necessary tools: multimeter, socket set, and safety gloves.
Ensure the vehicle is parked and in 'Park' mode.
Disconnect the 12V battery for safety.

2. Inspect and Test the 12V Battery

Measure Voltage:
- Reconnect the multimeter to the 12V battery terminals.
- Check the voltage; it should be at least 12.4V.
Clean Connections:
- Disconnect the battery terminals (negative first, then positive).
- Clean any corrosion from the terminals and battery posts using a wire brush.
Reconnect Battery:
- Reconnect the positive terminal first, followed by the negative terminal.

3. Check the Starter Relay

Locate Relay:
- Find the starter relay in the vehicle's fuse box as per the owner's manual.
Test Relay:
- Using the multimeter, check for continuity across the relay terminals while the ignition is in the "On" position.
- Replace the relay if there is no continuity.

4. Inspect Main Battery Connections

Visual Inspection:
- Carefully examine the main battery connections for any loose or damaged wires.
Tighten Connections:
- If connections are loose, tighten them using a socket set as per the torque specifications in the manual.