Test 11/Fault Code 25
Test point 11Front left speed sensor, open circuit/ short to ground/ short to B+
Fault code 25
Wire/plug connection between control module and speed sensor not in order (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 System Tester 9288 via the Actual Values menu (see test point 7/fault code 21). 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 36 and PIN 10 or between PIN 35 and PIN 10 on the plug (refer to "Connector Pin Assignment"). Control Unit Pin Assignment Nominal value 1600...1800 W. 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 W) is not achieved and the wiring /plug connection is in order, replace the speed sensor. if speed sensors were installed before 24.11.1995, both speed sensors on an axle must be replaced.
- Check PIN 10, 35 or 36 (depending on model / Model Year) of control unit connector (check visually for deformation).