Component Tests and General Diagnostics

Throttle valve control module -J338-, checking

The following components are located in the housing of the throttle valve control module:

(This housing must not be opened)

- Throttle drive (power accelerator actuation) - G186- (This is an electric motor which is activated by the engine control module. The electric motor opens the throttle valve against the force of a spring).
- 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 resistances). They provide the position of the throttle valve to the engine control module completely independently of one another (redundant system).
- The potentiometers cannot be adjusted mechanically. The settings are made as part of basic setting (function 04) using the vehicle diagnostic, testing and information system VAS 5051 or the V.A.G 1551 Scan Tool.