Component Tests and General Diagnostics

Throttle Valve Control Module -J338, Checking

The throttle valve control module housing contains the following components:

CAUTION! The housing should NOT be opened.

- Throttle drive -G186 (power accelerator actuation) (This is an electric motor activated by the engine control module. The motor opens the throttle valve by applying force to overcome the spring pressure.)
- Angle sensor -1- for throttle drive (power accelerator actuation) -G187
- Angle sensor -2- for throttle drive (power accelerator actuation) -G188


NOTE:
- The angle sensors are in the form of potentiometers (variable resistors). Each sends its own separate signal to inform the engine control module of the position of the throttle valve (i.e. one of the signals is redundant).
- The potentiometers cannot be adjusted mechanically. Settings are made using the "Basic Setting" function (function 04) with VAG1551 scan tool or VAG1552.