Golf III L4-2.0L (ABA) (1995)
Throttle Position Sensor: Testing and Inspection
Without VAG
WIRING CHECK
Digifant I 38 Pin Control Unit Connector
1. With the ignition "OFF", disconnect the Motronic control unit harness connector. The Motronic control unit is located beneath the drip tray, at the
left rear (drivers side) of the engine compartment. For these tests it may be easier to remove the control unit from its mount, this will allow better
access to the harness connector pins.
Special Tools
CAUTION: Avoid damaging the delicate connectors within the control unit harness connector. A simple set of test leads can be fabricated using
flat connectors (part # VW N 17 457 2) or equivalent, and a pair of alligator clips.
Digifant I Throttle Valve Potentiometer
2. Disconnect Throttle Position Sensor harness connector, which is located on the throttle body.
3. Using a suitable digital multimeter set on ohms, measure the resistance between Motronic harness connector pin 34 and Throttle Position Sensor
harness connector pin 1:
^
The correct measurement should be continuity (1.5 ohms maximum).
CAUTION: Always turn the ignition switch "OFF" before changing meter ranges, and before disconnecting or connecting the meter probes.
Doing so with the ignition switch turned "ON" risks permanent control unit damage.