my Tesla Model S Original (2012-2020) shows C1002 code, what does it indicate?

Learn how to diagnose and fix C1002 electrical issue in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Ensure the vehicle is on a flat surface and power down the vehicle completely.
• Disconnect the 12V battery to prevent electrical shock.
• Gather necessary tools and replacement parts.

2. Inspect and Clean Battery Connections

• Use a socket set to remove the battery cover.
• Inspect all battery terminals and connectors for corrosion or damage.
• Clean any corrosion using a mixture of baking soda and water, and a wire brush.
• Reconnect the battery terminals securely, ensuring they are tight.

3. Check and Update Software

• Connect the vehicle to Wi-Fi to check for software updates.
• Navigate to the software section in the vehicle settings and initiate any available updates.
• Follow on-screen instructions to complete the update process.

4. Inspect and Test Inverter

• Remove the inverter cover using a socket set.
• Inspect the inverter for any visible damage or loose wiring.
• Use a multimeter to test the inverter output voltage; compare it to Tesla's specifications.
• Replace the inverter if it fails the voltage test or shows signs of damage.

5. Battery Health Diagnostic

• Use Tesla's diagnostic tool to run a complete battery health check.
• Record any findings and address any issues indicated by the diagnostics.
• If the battery is found to be failing, consider contacting Tesla for assistance with replacement.