Component Tests and General Diagnostics

Throttle Valve Control Module -J338-, Checking

The following components are accommodated in the housing of the throttle valve control module:
- Throttle valve drive -G186- (this is an electric motor actuated by the engine control module which opens the throttle valve by overcoming a spring force)
- Angle sensor 1 for throttle valve drive -G187-
- Angle sensor 2 for throttle valve drive -G188-

NOTE:
- The housing of the throttle valve control module is not to be opened.
- The angle sensors take the form of potentiometers (variable resistors). They provide the engine control module with an independent indication of the throttle valve position.
- The potentiometers cannot be mechanically adjusted. Settings are made as part of basic setting (function 04) using the vehicle diagnostic, testing and information system VAS 5051.