why does my Toyota RAV4 Fifth Generation (2019-present) have a sudden loss of steering assist

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, power steering fluid.
• Disconnect the negative battery terminal to prevent electrical shorts and ensure safety.

2. Check and Replace Power Steering Fluid

• Sub-steps:
  1. Locate the power steering reservoir and remove the cap.
  2. Inspect the fluid level; if low, top it off with the manufacturer-recommended power steering fluid.
  3. If the fluid is dirty or contaminated, drain the reservoir and replace it with new fluid.
  4. Recheck the fluid level after topping off.

3. Inspect and Repair Electrical Connections

• Sub-steps:
  1. Visually inspect the wiring harness connected to the EPS motor for any signs of damage or corrosion.
  2. Disconnect the connectors and clean them with electrical contact cleaner.
  3. Reconnect the wiring and ensure all connections are secure.

4. Test and Replace EPS Motor (if necessary)

• Sub-steps:
  1. Use a multimeter to test the EPS motor for resistance and functionality according to the service manual specifications.
  2. If the motor is defective, remove it by unscrewing the mounting bolts and disconnecting the electrical connector.
  3. Install the new EPS motor, ensuring it is properly aligned and secured with the correct torque specifications.
  4. Reconnect the electrical connectors.

5. Reset Error Codes

• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Use the OBD-II scanner to clear any stored error codes related to the EPS system.