my Toyota Corolla E210 (2019-2024) is having trouble starting, what could it be?

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure safety by wearing gloves and safety glasses.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Battery Inspection and Replacement

• Check Battery Condition:
  • Clean the battery terminals with a wire brush if corrosion is present.
  • If the battery voltage is below 12.4 volts, consider recharging or replacing the battery.
• Replace Battery (if necessary):
  • Remove the battery hold-down bracket using a socket set.
  • Disconnect the positive terminal first, followed by the negative terminal.
  • Remove the old battery and install a new battery, connecting the terminals (negative first).

3. Starter Motor Inspection and Replacement

• Inspect Starter Motor:
  • Locate the starter motor (usually near the engine block).
  • Check wiring connections for tightness and corrosion.
• Replace Starter Motor (if faulty):
  • Disconnect the wiring harness from the starter.
  • Remove the bolts securing the starter to the engine block using a socket set.
  • Install the new starter motor and torque the bolts to the manufacturer's specifications.
  • Reconnect the wiring harness.

4. Ignition Switch Testing and Replacement

• Test Ignition Switch:
  • Reconnect the negative battery terminal.
  • Use a multimeter to check for continuity in the ignition switch when turned to the "Start" position.
• Replace Ignition Switch (if necessary):
  • Remove any panels covering the ignition switch.
  • Disconnect the wiring harness and unscrew the ignition switch from its mounting.
  • Install the new ignition switch and reconnect all components.