On-Vehicle Inspection

3MZ-FE ENGINE CONTROL SYSTEM: THROTTLE BODY:

ON-VEHICLE INSPECTION

1. INSPECT THROTTLE BODY ASSEMBLY
(a) Listen to the throttle control motor operating sounds.
(1) Turn the ignition switch to ON.
(2) When pressing the accelerator pedal position sensor lever, listen to the running motor. Make sure no friction noise comes from the motor.
If friction noise exists, replace the throttle body assembly.
(b) Inspect the throttle position sensor.
(1) Connect the Techstream to the DLC3.
(2) Turn the ignition switch to ON.
(3) Check that the MIL turns off.
(4) Turn the Techstream main switch on.
(5) Select the menu items: Powertrain / Engine and ECT / Data List / Throttle Position.
(6) Check the value of throttle valve angle is within the standard range below.
Standard throttle valve opening percentage:
60% or more
If the percentage is less than 60%, replace the throttle body assembly.
NOTE: When checking the throttle valve opening percentage, the transmission should be in neutral.