Touareg V8-4.2L (BHX) (2004)
Electronic Throttle Control Module: Testing and Inspection
Diagnostic Procedures
Throttle Valve Control Module, Checking
‹› Use only gold-plated terminals when servicing terminals in harness connector of throttle valve control module.
Function
The throttle valve activation occurs via an electric motor (throttle drive) in the throttle valve control module. It is activated by the Engine Control
Module (ECM) according to specifications of the two sensors, Throttle Position (TP) Sensor (G79) and Sender -2- for accelerator pedal position
(G185) --> [ Electronic Engine Power Control ] See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Electronic Engine Power
Control, function of the EPC system.
Components of Throttle Valve Control Module (J338):
‹› Throttle drive (G186) (power accelerator actuation)
‹› Angle sensor -1- for throttle drive (power accelerator actuation) (G187)
‹› Angle sensor -2- for throttle drive (power accelerator actuation) (G188)
Special tools, testers and auxiliary items required
‹› Multimeter (VAG1526) or multimeter (VAG1715)
‹› Connector test kit (VAG1594)
‹› Wiring diagram
Test requirements
‹› Fuses in E-box (in plenum chamber, left) must be OK:
‹› Battery voltage must be at least 11.5 volts.
‹› All electrical consumers such as, for example, lights and rear window defroster must be switched off.
‹› Parking brake must be engaged or else daylight driving lights will be switched on.
‹› If vehicle is equipped with an A/C system, it must be switched off.
‹› Ground (GND) connections between engine and chassis must be OK.
‹› Throttle valve must not be damaged or dirty.