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

Tesla Model 3 Highland (2024-present)

Error Codes

1-3 hours

Time

medium

Difficulty

high

Severity

3 min read

527 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

Diagnose and fix the clicking noise when starting your Tesla Model 3 (2017-2023). Step-by-step guide with symptoms, diagnostics, and repair instructions.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the main battery before working on electrical systems.
•Allow the vehicle to sit for a few minutes before servicing to avoid electric shock.

Symptoms

•Clicking noise heard during start-up
•Vehicle fails to start or has slow cranking
•Warning lights illuminated on the dashboard
•Intermittent electrical issues (e.g., lights flickering)
•Reduced battery range displayed

Diagnostic Steps

1
Scan the vehicle's onboard computer using an OBD-II scanner for any error codes.
2
Inspect the 12V battery for proper voltage levels and connections.
3
Check for loose or corroded battery terminals and grounding connections.
4
Examine the starter motor and its connections for wear or damage.
5
Test the main battery pack for any faults or issues using Tesla diagnostics.
6
Verify the state of charge of the 12V battery and perform a load test if necessary.

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

•OBD-II scanner
•Multimeter
•Socket set
•Battery terminal cleaner
•Torque wrench

Parts Required

•12V battery (if replacement is necessary)
•Starter motor (if replacement is necessary)

Related Faults

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Diagnostic Steps

1
Scan the vehicle's onboard computer using an OBD-II scanner for any error codes.
2
Inspect the 12V battery for proper voltage levels and connections.
3
Check for loose or corroded battery terminals and grounding connections.
4
Examine the starter motor and its connections for wear or damage.
5
Test the main battery pack for any faults or issues using Tesla diagnostics.
6
Verify the state of charge of the 12V battery and perform a load test if necessary.

Solution

1. Preparation

Tools Required: OBD-II scanner, multimeter, socket set, battery terminal cleaner, torque wrench.
Ensure the vehicle is in park and turn off all electrical accessories.
Disconnect the main battery by following the manufacturer’s guidelines.

2. Inspect and Replace the 12V Battery

Access the Battery:
- Remove the rear trunk floor cover to expose the 12V battery.
Check Voltage:
- Use a multimeter to measure the battery voltage; it should be above 12.4 volts.
Clean Terminals:
- Use a battery terminal cleaner to remove any corrosion from the terminals.
Replace Battery (if necessary):
- Disconnect the negative terminal first, followed by the positive terminal.
- Remove the battery hold-down bracket and lift the battery out.
- Install the new battery in reverse order, ensuring terminals are tight.
- Torque the battery terminals to specifications (usually around 5-7 ft-lbs).

3. Inspect Starter Motor

Locate the Starter:
- Access the starter motor beneath the vehicle as per service manual instructions.
Check Connections:
- Inspect wiring and connectors for any signs of wear or disconnection.
Test Starter:
- Use a multimeter to check the starter's voltage when attempting to start the vehicle.
Replace Starter (if necessary):
- Remove the mounting bolts and detach the starter from the engine.
- Install the new starter and secure it with bolts to the specified torque.