As I replaced suspension parts on my 1998 Omega B 2.0 16V, I tried removing the front ABS/wheel speed sensors. They broke, on both sides... and I learned that you simply do not remove them.
Note that the ABS-light was not on before the sensors were replaced.
After having installed everything, along with the new sensors, the ABS-light went on after having driven a few hundred meters.
The best deal I could find on new sensors was from USA. These sensors was specified to fit 1997 Cadillac Catera, but the OEM part number (90509421) matched. Could this be an issue?..
Measuring the sensors with a multimeter shows a resistance of ~1520 Ohm, on both sides. The sensors both react to waving a magnetic material past them. Rotating the wheel hubs slowly results in a voltage of 0.1-0.2 VDC, both sides, but it does not seem consistent.. I do not get any reading measuring ADC.
I have tried thoroughly cleaning the teeth on both wheel hubs.
I have tried connecting an ELM327 OBD, but it tells me that there is no communication with the ECU (the ELM327 works with other cars). I also tried getting codes by shorting pin 5 & 6 in the OBD-connector, but there is no flashing of codes (should ABS-related codes flash here as well?..).
I have had the battery negative terminal disconnected for a few minutes -> the ABS-light is on as soon as I connect it again and start the car.
I installed a coilover-kit on the car, which made it substantially lower than stock. But this should not be related, I suppose.
I suppose the problem have nothing to do with the rear wheel speed sensor, since the speedometer is working as normal.
Anyone have any ideas? Thanks in advance!