my Toyota RAV4 won't start and makes a clicking noise, what should I check

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, socket set, wrenches, and safety gloves.
• Ensure the vehicle is in park (automatic) or neutral (manual) and the parking brake is engaged.
• Disconnect the negative (-) battery cable to avoid electrical shocks.

2. Battery Inspection and Replacement

• Sub-steps:
  1. Remove the battery terminals, starting with the negative (-) terminal followed by the positive (+) terminal.
  2. Clean any corrosion from the terminals using a battery cleaning brush or a mixture of baking soda and water.
  3. Test the battery with a multimeter; if below 12.6 volts, consider replacing the battery.
  4. Install a new battery (if needed) by connecting the positive (+) terminal first, then the negative (-) terminal.

3. Starter and Relay Check

• Sub-steps:
  1. Locate the starter relay in the fuse box; consult the owner's manual for exact location.
  2. Remove the starter relay and visually inspect for damage or corrosion.
  3. Substitute with another relay from the fuse box (if applicable) to test functionality.
  4. If the relay is faulty, replace it with an OEM relay.

4. Starter Motor Inspection

• Sub-steps:
  1. Locate the starter motor; it is typically mounted on the engine near the transmission.
  2. Disconnect the electrical connector and the power cable from the starter.
  3. Use a multimeter to check for voltage at the starter terminal when the ignition key is turned.
  4. If no voltage is present, trace back to the ignition switch and check for continuity.
  5. If voltage is present but the starter does not engage, replace the starter motor.