my Toyota Corolla E140 (2006-2013) won’t start and there’s no sound what to do

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, socket set, and a screwdriver.
• Ensure you have safety gear such as gloves and safety glasses.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Battery Inspection

• Check battery terminals:
  • Remove the negative terminal first, then the positive terminal.
  • Clean the terminals with a wire brush if corroded.
  • Reconnect terminals, starting with the positive, then the negative.
• Test the battery:
  • Use the multimeter to check the voltage.
  • If voltage is below 12.4 volts, jump-start the vehicle or replace the battery.

3. Fuse and Relay Check

• Inspect the ignition fuse:
  • Locate the fuse box under the dashboard or hood.
  • Remove the ignition fuse and inspect for continuity using a multimeter.
  • Replace the fuse if it is blown.
• Check the starter relay:
  • Locate the starter relay in the fuse box.
  • Remove and visually inspect it or swap with a similar relay.
  • If the vehicle starts after swapping, replace the faulty relay.

4. Starter and Wiring Inspection

• Check wiring to the starter:
  • Locate the starter motor and inspect the connections.
  • Ensure that the starter motor wires are secure and undamaged.
• Test the starter:
  • If accessible, use a multimeter to check for voltage at the starter solenoid when the ignition is turned.
  • If voltage is present and the starter does not engage, replace the starter motor.

5. Neutral Safety Switch Test

• For automatic transmissions:
  • Locate the neutral safety switch.
  • Disconnect the wiring harness and use a jumper to bypass it temporarily.
  • Attempt to start the vehicle. If it starts, replace the neutral safety switch.