-> Fig.8 Throttle valve potentiometer -G69-
Locations:
On a petrol engine the potentiometer is a component part of the throttle valve control part -J338-. It can be
found on the throttle valve housing (engine).
On a Diesel engine the "Throttle valve signal" is generated in the sender for accelerator pedal position -G79-.
The sender can be found near the accelerator pedal.
For self-diagnosis:
The throttle valve potentiometer is one of the engine control unit sensors. However the gearbox control unit
also requires the throttle valve potentiometer signal.
For this reason the signal from the engine control unit is transmitted to the automatic gearbox control unit.
On vehicles with Data bus the automatic gearbox control unit receives the throttle valve potentiometer signal
from the Data bus.
On vehicles without Data bus the signal is made available via a wire from the engine control unit.
The self-diagnosis of the automatic gearbox only checks the signal, not the potentiometer! On vehicles without
Data bus the wire for the signal is also checked.
The signal can only be read-out in measured value block.
=> Read measured value block =>Page
; Display group number 001 and 003
It is therefore imperative that the self-diagnosis of the engine control unit is also carried out when the self-
diagnosis indicates that the throttle valve potentiometer is faulty.
Checking and adjusting or removing and installing throttle valve potentiometer
Petrol engine
=> Repair group 24; depending on engine code depending on engine code
Diesel engine
=> Repair group 20
Golf 1998 ➤
Automatic gearbox 01M self-diagnosis - Edition 10.1997
2.1 - Locations of electrical/electronic components
11
