Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Lexus >> 2021 >> NX 300 Base, AWD >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Control System - Service Information >> Throttle Body >> On-Vehicle Inspection [10/2014 - ] >> Procedure

On-Vehicle Inspection [10/2014 - ]: Procedure

  1. INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY 
    NOTE:

    Be sure to check functions after cleaning and replacing the throttle body with motor assembly.

    1. After installing the throttle body with motor assembly to the vehicle, turn the engine switch on (IG) without operating the accelerator pedal.
      NOTE:

      If the accelerator pedal is operated, perform the above steps again.

    2. Connect the DLC3 to the Techstream and clear the DTCs.

      Refer to DTC CHECK / CLEAR [10/2014 - 05/2019] , or refer to DTC CHECK / CLEAR [05/2019 - ]

    3. Enter the following menus: Powertrain / Engine / Data List / Engine Speed.

      Powertrain > Engine > Data List 

      Tester Display
      Engine Speed
    4. Start the engine and check that the MIL is not illuminated. After the engine is warmed up, check that the idle speed is within the specified range when the A/C is switched off.

      Standard

      Condition Engine Idle Speed
      A/C switched off 750 to 850 rpm
      NOTE:
      • Be sure to perform this step with all accessories off.
      • Make sure that the shift lever is in P on N.
    5. Enter the following menus: Powertrain / Engine / Data List / Throttle Sensor Position.

      Powertrain > Engine > Data List 

      Tester Display
      Throttle Sensor Position
    6. Depress the accelerator pedal. When the throttle valve is fully opened, check that the value of "Throttle Sensor Position" is within the specification.

      Standard throttle valve opening percentage

      60% or more

    7. Perform a drive test, and check for any abnormal feeling in the engine speed.