how to fix the dashboard lights flickering in Toyota RAV4 XA50 (2019-2024)

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, socket set, screwdriver set
• Disconnect the negative battery terminal to prevent electrical shock.
• Allow the vehicle to cool if recently driven.

2. Inspect Battery Connections

• Sub-steps:
  1. Locate the battery under the hood.
  2. Remove the negative terminal using the appropriate socket.
  3. Clean any corrosion on the terminals with a wire brush.
  4. Ensure the terminals are tightened securely before reconnecting.

3. Test the Alternator Voltage

• Sub-steps:
  1. Reconnect the battery.
  2. Start the engine and use a multimeter to measure the voltage across the battery terminals.
  3. Voltage should read between 13.8V and 14.4V. If lower, the alternator may need to be replaced.

4. Check Instrument Cluster Wiring

• Sub-steps:
  1. Remove the instrument cluster (consult the vehicle service manual for specific instructions).
  2. Inspect all connectors and wiring for signs of wear or damage.
  3. Re-seat any loose connections and replace damaged wiring if necessary.

5. Test and Replace Dimmer Switch

• Sub-steps:
  1. Locate the dashboard light dimmer switch.
  2. Disconnect the switch and use a multimeter to test for continuity.
  3. If the switch is faulty, replace it with a new one.