what causes my Toyota RAV4 XA40 (2013-2018) to stall when stopping

Solution

1. Preparation

• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the battery to prevent any electrical shorts.

2. Clean or Replace the Idle Air Control Valve (IACV)

• Tools Required: Socket set, cleaning solvent, toothbrush or small brush.
• Sub-steps:
  1. Locate the IACV, usually found on the intake manifold.
  2. Remove the electrical connector and mounting screws.
  3. Clean the valve using a suitable cleaning solvent.
  4. If cleaning does not resolve the issue, replace the IACV with a new unit.

3. Throttle Body Cleaning

• Tools Required: Throttle body cleaner, soft cloth, socket set.
• Sub-steps:
  1. Remove the air intake duct connected to the throttle body.
  2. Spray throttle body cleaner onto the throttle plate and around the bore.
  3. Use a soft cloth to wipe away carbon deposits.
  4. Reassemble the air intake duct securely.

4. Inspect and Repair Vacuum Leaks

• Tools Required: Smoke machine or soapy water solution, hose clamps.
• Sub-steps:
  1. Inspect all vacuum hoses for cracks or disconnections.
  2. Use a smoke machine or spray soapy water to identify leaks.
  3. Replace any damaged hoses and ensure all connections are tight.

5. Fuel System Check

• Tools Required: Fuel pressure gauge.
• Sub-steps:
  1. Locate the fuel pressure test port on the fuel rail.
  2. Connect the fuel pressure gauge and turn the ignition to the "ON" position without starting the engine.
  3. Check the fuel pressure reading; it should be within the manufacturer's specifications.
  4. If pressure is low, inspect the fuel pump and fuel filter for issues.