my Toyota RAV4 won't start but has power what could be wrong

Solution

1. Preparation

• Tools Required: Multimeter, socket set, OBD-II scanner, jumper cables.
• Disconnect the negative battery terminal to ensure safety during repairs.

2. Inspect and Clean Battery Connections

• Remove the positive and negative battery terminals using a socket wrench.
• Clean any corrosion from the battery terminals and cable ends using a wire brush.
• Reconnect the battery terminals, starting with the positive terminal followed by the negative terminal.

3. Check and Replace the Starter Relay

• Locate the starter relay in the fuse box.
• Remove the relay and inspect its condition.
• Swap with a similar relay to test functionality.
• If the vehicle starts, replace the faulty relay.

4. Test and Replace the Starter Motor (if necessary)

• If the relay is functional, use jumper cables to connect the starter motor directly to the battery.
• If the starter motor engages and the engine starts, replace the starter motor.
• If it does not engage, further diagnose the wiring and ignition switch.

5. Reassemble and Test

• Reconnect any removed components.
• Ensure all connections are secure.
• Reconnect the negative battery terminal.
• Attempt to start the vehicle.