my Toyota Highlander XU70 (2020-Present) won't start and just clicks, what should I do?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is in park or neutral with the parking brake engaged.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Battery Inspection and Replacement

• Inspect Battery:
  • Remove the battery terminals (negative first, then positive).
  • Clean any corrosion from the terminals and battery posts using a wire brush.
• Replace Battery (if necessary):
  • If battery voltage is low (below 12.4 volts), replace with a new battery (ensure it matches OEM specifications).
  • Connect the new battery (positive first, then negative) and ensure all connections are tight.

3. Starter Motor Inspection and Replacement

• Inspect Starter:
  • Locate the starter motor (usually found near the transmission).
  • Check wiring connections to the starter for tightness and corrosion.
• Replace Starter (if necessary):
  • Disconnect the battery again.
  • Remove the bolts securing the starter motor to the engine.
  • Disconnect the electrical connections from the starter.
  • Install the new starter by reversing the removal process, ensuring all connections are secure.
  • Reconnect the battery.

4. Check Ignition Switch

• If the problem persists, test the ignition switch for continuity.
• Replace the ignition switch if it is faulty.