Test Point 6

Test point 6

Front left speed sensor, open circuit/ short to ground/ short to B+ Fault code 4205
Wire/plug connection between control module and speed sensor not OK (open circuit, short to B+ or short to ground) or the speed sensor itself is damaged.
- Check the speed sensor wire and plug connection in the wheel area for damage (visual inspection).
- Check the speed sensor signal with the Porsche System Tester 2 via the Actual values menu (see test point 2/diagnostic trouble code 4206). If no speed is displayed when the left front wheel is turned, check the wiring from the control module connector to the speed sensor (following test step).
- Pull off control module connector. Measure internal resistance/ continuity between PIN 6 and PIN 7 on the connector.
Nominal value 1600...1800 Ohms.
If the nominal value is not achieved, check wires and plug connection in the wiring from the front left speed sensor. If the nominal value (1600...1800 Ohms) is not achieved and the wiring /plug connection is in order, replace the speed sensor.
- Check PIN 6 and PIN 7 of the control module connector (visual inspection for deformation).