TTS Quattro Roadster L4-2.0L Turbo (CDMA) (2009)
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Electronic Throttle Control Module: Testing and Inspection
Throttle Valve Control Module, Checking
Observe all safety precautions: => [ Safety Precautions ] See: Computers and Control Systems/Service Precautions/Safety Precautions
View clean working conditions: => [ Clean Working Conditions ] See: Computers and Control Systems/Service Precautions/Clean Working
Conditions
Use only gold-plated terminals when servicing any component with gold-plated electrical harness connector terminals.
For wiring diagrams, component locations, and connector views, Refer to the applicable wiring diagram.
Special tools, testers and auxiliary items required
‹› multimeter.
‹› Wiring diagram.
‹›
Test requirements
‹› The Motronic Engine Control Module (ECM) ( J623 ) fuses OK.
‹› Battery voltage at least 12.5 volts.
‹› All electrical consumers such as, lights and rear window defroster, switched off.
‹› Vehicles with automatic transmission, shift selector lever into position " P" or "N".
‹› A/C switched off.
‹› Ground (GND) connections between engine/transmission/chassis OK.
‹› Throttle valve must not be damaged or dirty.
‹› Coolant Temperature at least 80° C.
Function
Throttle valve operation occurs by an electric motor (Throttle Drive (for Electronic Power Control (EPC)) (G186)) in the Throttle Valve Control
Module ( J338). It is operated by the Motronic Engine Control Module (ECM) (J623) and the Throttle Position (TP) Sensor (G79)/Accelerator Pedal
Position Sensor 2 (G185).
The Throttle Valve Control Module (J338) is made up of the following components:
