how to diagnose a faulty ignition coil in Honda Civic 9th Generation (2012-2015)

Solution

1. Preparation

• Gather tools and materials: OBD-II scanner, multimeter, socket set, torque wrench.
• Ensure the vehicle is parked on a flat surface, and the engine is cool.

2. Remove Ignition Coil

• Disconnect the negative battery terminal to prevent electrical shock.
• Remove any engine covers or components obstructing access to the ignition coil.
• Disconnect the electrical connector from the ignition coil.
• Unscrew the ignition coil mounting bolts using the socket set.
• Carefully pull the ignition coil out of the spark plug well.

3. Inspect and Replace

• Inspect the rubber boot and terminal for wear or damage.
• If replacing, install the new ignition coil by reversing the removal steps:
  • Insert the new coil into the spark plug well and tighten the mounting bolts to the manufacturer's specified torque (usually around 8-10 ft-lbs).
  • Reconnect the electrical connector securely.

4. Reassembly

• Reinstall any components or covers that were removed.
• Reconnect the negative battery terminal.