Jonasand

Got the dreaded abs/4x4/flat tire... Checked code and got 6d9b wheel sensor left supply.

Since im not home i could only take off the sensor, the "ring" looks fine, did find some metalrust in the hole i removed, saw one spot on the ring with clean metal, saw nothing on the senor and still protected by rubber, same with connections, looked clean.


Also checked with protool and left front gives no signal for wheel speed.

Weird is i drove several miles with it on, parked it for 2 days and then it was off for a few mile before coming on again.

Is there a way to test the sensor with protool/ista/ inpa or multimeter?

Aswell test for voltage from ecu to sensor?


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seanjordan20

Check resistance 980-2350ohms. If not then replace sensor. If it is then test voltage by turning the wheel

Jonasand

Righty... So the wheel turn, do i just read from the connector from ecu then or all connected to se 12v thrue sensor?

Also i heard bad things from aftermarket sensors?

seanjordan20

Put positive lead on sensor connector while unplugged and negative lead on any ground. Turn wheel and you should get a voltage reading 190-1140mV. If not something is wrong inside and it's not the sensor. If you need a sensor get BMW or OEM only. Bosch is OEM

Jonasand

Thanks, yeah im searching for a bosch. But all here in sweden seem to be out of supply.

seanjordan20

You can get a Delphi one also

donpb

Did you attempt to calibrate the FTM?