Turn the ignition switch OFF, if STV synchronization is performed on the vehicle.
Turn the STVA shaft with a finger so that the throttle valve height (A) will be same as (B).
Caution! Do not use the tool for turning the STVA shaft to prevent breakdown.
Note: Measure the throttle valve height (A), (B) from top of the throttle body (1) to the throttle valve (2).
While holding above No.1 STV position, turn the adjust screw (3) so that the throttle valve height (C) will be same as (D).