what should I do if my Tesla Model S Original (2012-2020) won’t start but just clicks?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

578 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 S (2012-2020). Step-by-step guide with symptoms, diagnostic steps, 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.
•Ensure the vehicle is in a safe location away from traffic before performing any repairs.

Symptoms

•Clicking sound when attempting to start the vehicle
•Dashboard lights may illuminate but engine does not turn over
•Possible loss of power to accessories
•No response from the motor or drivetrain
•Warning messages on the display (e.g., 'Power Reduced')

Diagnostic Steps

1
Check the 12V battery voltage using a multimeter.
2
Inspect the 12V battery connections for corrosion or looseness.
3
Verify the state of charge of the main battery pack through the vehicle’s display.
4
Run a diagnostic scan using Tesla's service tools to check for error codes.
5
Check for any recent software updates or resets that may have been needed.

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
•Jumper cables
•Tesla service tool

Parts Required

•12V battery

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Diagnostic Steps

1
Check the 12V battery voltage using a multimeter.
2
Inspect the 12V battery connections for corrosion or looseness.
3
Verify the state of charge of the main battery pack through the vehicle’s display.
4
Run a diagnostic scan using Tesla's service tools to check for error codes.
5
Check for any recent software updates or resets that may have been needed.

Solution

1. Preparation

Ensure the vehicle is in a safe location and is powered off.
Gather tools and parts required for the repair.
Tools Required: Multimeter, socket set, jumper cables (if needed), Tesla service tool (if available).

2. Inspect the 12V Battery

Sub-steps:
- Open the front trunk (frunk) to access the 12V battery compartment.
- Disconnect the negative terminal first, then the positive terminal to ensure safety.
- Use a multimeter to measure the voltage of the 12V battery; it should ideally be above 12.4 volts.
- If the voltage is low, proceed to jump-start the battery or replace it if necessary.

3. Check Battery Connections

Sub-steps:
- Inspect both the positive and negative battery terminals for corrosion, loose connections, or damage.
- Clean the terminals with a wire brush if corrosion is present.
- Reconnect the terminals, starting with the positive terminal, then the negative terminal. Ensure they are securely tightened.

4. Charge or Replace the 12V Battery

Sub-steps:
- If the battery is found to be defective or unable to hold a charge, replace it with a new 12V battery that meets Tesla specifications.
- If jump-starting, connect jumper cables to the 12V battery and allow it to charge sufficiently before attempting to start the vehicle again.

5. Reset the Vehicle's Systems

Sub-steps:
- After resolving the 12V battery issue, perform a soft reset of the vehicle. This can usually be done by holding down the two scroll wheels on the steering wheel until the touchscreen reboots.
- Once the system is back online, check for any error messages or alerts.