my Toyota Camry won't start and just clicks what could be the issue

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.

2. Battery Inspection and Replacement

• Tools Required: Wrench or socket set
• Inspect the battery terminals for corrosion; clean them with a wire brush if necessary.
• If the battery shows low voltage (<12.4 volts), replace it:
  • Remove the battery hold-down bracket and disconnect the positive terminal followed by the negative terminal.
  • Lift the old battery out and replace it with a new one, ensuring correct terminal connections (positive first, then negative).
  • Reconnect the battery terminals and tighten securely.

3. Starter Motor Testing and Replacement

• Tools Required: Socket set, multimeter
• If the battery is functioning well and the issue persists, remove the starter motor:
  • Disconnect the battery again before working on the starter.
  • Locate the starter motor, and remove the necessary components for access (like the air intake if applicable).
  • Unplug the electrical connector and remove the mounting bolts from the starter.
  • Test the starter motor by bench testing it or replace it if it fails to engage.
  • Install the new or tested starter motor by reversing the removal process. Torque bolts to manufacturer specifications.

4. Final Checks

• Reconnect the battery terminals. Ensure all connections are tight.
• Conduct a final visual inspection of all replaced components.