I've got the dreaded DSC light coming on on my 2004 E46 325i.
I hooked up INPA. It says brake circuit 2 error code. When I look at the analog readout, brake circuit 2 shows ranges between 4.5-5.5 bar when I have my foot off the brake pedal (it moves a little on its own), while brake circuit 1 is consistently around -0.9 bar. Both the circuits stay within 4-5 bar of each other as I depress the pedal both with engine running and off.
The brake sensor 2 offset though is consistently in the 5-6 bar range which is in the red zone. It looks to me like the offset is where the computer thinks "no pedal pushed" pressure is - is that right? If it is, it would indicate that there is consistently around 5 bar too much pressure in circuit 2, which is enough to trigger the DSC light.
The question is whether the problem is the sensor or something else? it seems to me unlikely the sensor is gone - the ones I've seen on the internet seem to read out clearly spurious readings (e.g. 250bar) - my reading might well be believable given how it behaves. But if it's not the sensor, what else could be causing a 5 bar minimum in one of the brake circuits? A stuck caliper (I'm not feeling it)? Something else?
Any thoughts much appreciated!
I hooked up INPA. It says brake circuit 2 error code. When I look at the analog readout, brake circuit 2 shows ranges between 4.5-5.5 bar when I have my foot off the brake pedal (it moves a little on its own), while brake circuit 1 is consistently around -0.9 bar. Both the circuits stay within 4-5 bar of each other as I depress the pedal both with engine running and off.
The brake sensor 2 offset though is consistently in the 5-6 bar range which is in the red zone. It looks to me like the offset is where the computer thinks "no pedal pushed" pressure is - is that right? If it is, it would indicate that there is consistently around 5 bar too much pressure in circuit 2, which is enough to trigger the DSC light.
The question is whether the problem is the sensor or something else? it seems to me unlikely the sensor is gone - the ones I've seen on the internet seem to read out clearly spurious readings (e.g. 250bar) - my reading might well be believable given how it behaves. But if it's not the sensor, what else could be causing a 5 bar minimum in one of the brake circuits? A stuck caliper (I'm not feeling it)? Something else?
Any thoughts much appreciated!
