Toyota Tundra Service Manual: On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. CHECK THROTTLE BODY ASSEMBLY

(a) Check the throttle control motor operating sounds.

(1) Turn the ignition switch to ON.

(2) When depressing the accelerator pedal, check the operating sound of the running motor. Make sure that no friction noises emit from the motor.

If friction noise exists, replace the throttle body.

(b) Check the throttle position sensor.

(1) Connect the Techstream to the DLC3.

(2) Turn the ignition switch to ON.

(3) Turn the Techstream main switch ON.

(4) Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Throttle Sensor Position.

(5) 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

HINT:

When checking the standard throttle valve opening percentage, the shift lever should be in the N position.

If the percentage is less than 60%, replace the throttle body assembly.