B0710Sunroof Position Sensor Circuit
- Generic OBD-II code · Body
- How the car detects it
- Nothing public confirms B0710: it is missing from J2012 extracts, workshop manuals and recall bulletins alike. The title refers to the position feedback of a power sunroof. Typical designs count pulses from a Hall sensor at the motor shaft: Nedap's NL1001829C2 derives panel position and speed from the pole changes, and Bosch's DE19815960A1 resets such a counter at a mechanical stop and uses it to separate sliding from tilting travel. Without valid pulses neither the anti-trap function required by FMVSS 118 nor one-touch travel can work. In the 2011 Saab 9-5 the motor unit reports an unlearned calibration as B3697 4B; the 9-3 disables express operation with B3696 0B when the motor is misfitted or the mechanism blocked. Drive circuit: B0700.
- What you may notice
- One-touch opening or closing no longer works
- Roof stops short of its end position or reverses unexpectedly
- Roof can only be moved step by step until reinitialised
- Likely causes
- LikelyEnd positions not relearned after battery disconnection or motor replacement
- PossibleHall sensor or motor electronics faulty
- PossibleBinding mechanism or misfitted motor
- RareSignal wire or connector at the motor damaged
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.