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FRM ? Doesn't make sense
This solution of replacing FRM doesn't make sense to me.
I thought that servotronic control is coded into DME.
I know my FRM pretty well and I know that there are servotronic settings in there, but if I understand correctly for an M3 it's N/A and the mapping is in the DME.
I think DME tunes often include servotronic coding for this reason.
I have lack of assist in normal mode and only sometimes I feel that the steering returns to normal assist. So it's like an intermittent issue without fault codes.
Switching to Sport and back to Normal gives no noticeable change in assist or feel. I checked the level of fluid which is ok.
The way I see it one of four options:
1. pump is degraded
2. servotronic is jammed in sport mode
3. some blockage in the lines
4. previous owner had servotronic remapped.
Obviously I would have options 2,3,4 checked first.
DME: When my DME was reflashed to 240E it made no change. Maybe mapping will not be reset to OEM defaults by flashing ?
Servotronic : This is a solenoid , right ? everyone calls this a sensor but it should actuate/regulate oil pressure I think. Are there diagnostics in INPA/ISTA-D ?
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