how to fix Honda Civic 9th Generation (2012-2015) that doesn't respond when I turn the key

Solution

1. Preparation

• Tools Required: Multimeter, socket set, screwdriver set, battery terminal cleaner, fuse puller.
• Ensure the vehicle is parked on a flat surface and in "Park" or "Neutral."
• Disconnect the negative battery terminal to prevent any electrical shorts.

2. Battery Check and Cleaning

• Sub-steps:
  1. Remove the battery terminals using a socket set.
  2. Clean the battery posts and terminals with a battery terminal cleaner.
  3. Reconnect the terminals securely, starting with the positive terminal first, followed by the negative.

3. Ignition Switch Inspection

• Sub-steps:
  1. Remove the steering column cover using a screwdriver.
  2. Locate the ignition switch; disconnect the wiring harness.
  3. Use a multimeter to check for continuity when the key is turned to the "Start" position.
  4. If there is no continuity, replace the ignition switch.

4. Starter Relay Replacement

• Sub-steps:
  1. Locate the starter relay in the fuse box (refer to the owner's manual for the exact location).
  2. Remove the starter relay by pulling it straight out of the socket.
  3. Replace it with a known-good relay or a similar relay from another function in the fuse box.
  4. Reassemble the fuse box cover.

5. Wiring Inspection

• Sub-steps:
  1. Inspect the wiring harness connected to the starter for any visible damage or loose connections.
  2. If damage is found, repair or replace the affected wiring.
  3. Reconnect any loose connectors securely.