Fuel Pump (For High Pressure) On-Vehicle Inspection

Check fuel pressure.

1. Connect the intelligent tester to the DLC3.
   

2. Start the engine.
   

3. Turn the tester ON.
   

4. Enter the following menus: Power train / Engine / Active Test / Control the target fuel pressure.
   

5. Check that the fuel pressure fluctuates when the target fuel pressure changes.
   

   HINT:

   The Control the target fuel pressure operation lowers the target fuel pressure by 12.5% or increase the target fuel pressure by 25%.

   Standard:

   Fuel pressure fluctuates in accordance with tester operation.
   

   If the result is not as specified, replace the fuel pump or fuel pressure sensor.
   

Check operating sound.

1. Remove the V-bank cover.
   

2. Start the engine.
   





3. Using a sound scope, check the operating sound of the pump.
   If no sound can be heard, check the fuel pump, wire harness and ECM.
   

4. Stop the engine.
   

5. Reinstall the V-bank cover.
   

Measure the resistance between the terminals.

Standard resistance:

1.19 to 1.39 Ω at 20°C (68°F)