On-Vehicle Inspection

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUEL PUMP OPERATION
1. Check the fuel pressure
  1. Connect the Techstream to the DLC3
  2. Start the engine.
  3. Turn the Techstream ON
  4. Enter the following menus Powertrain / Engine / Active Test / Control the Target Fuel Pressure / User Data / Fuel Press.
  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 increases the target fuel pressure by 25%.
    
    Standard: Fuel pressure fluctuates in accordance with Techstream operation.
    
    If the result is not as specified, replace the fuel pump assembly or fuel pressure sensor.

INSPECT FUEL PUMP ASSEMBLY

Measure the resistance of the fuel pump assembly

Standard Resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
1 - 2	20°C (68°F)	1.19 to 1 39 Ω

If the result is not as specified, replace the fuel pump assembly

Fig 1: Measuring Resistance Of Fuel Pump Assembly