B0910Wiper Motor Rear Circuit
- Generic OBD-II code · Body
- How the car detects it
- A public definition of B0910 is lacking in J2012 extracts as well as in OEM and NHTSA documents. The title refers to the rear window wiper motor circuit. On the second-generation Saab 9-3 the rear electrical centre drives it through a relay and stores B3720: 01 if more than 6 V sits on the output during activation, so the wiper does not work, and 06 if over 6 V is present with the wiper off, where a short to ground makes the wiper run constantly and an open line stops it. In Bosch's rear wiper a single arm is driven directly by a compact drive unit. TI names stall detection and low losses as key requirements for any wiper drive. Unlike the front wiper (B0900) no safety standard prescribes it, so failure is a comfort and visibility issue.
- What you may notice
- Rear wiper does not run when switched on
- Rear wiper keeps running after switching off
- Likely causes
- LikelyWire break in the tailgate hinge harness
- PossibleRear wiper motor or spindle seized by corrosion
- PossibleRear wiper relay faulty
- RareRear module relay driver faulty
- Repair
- Easy · Often possible to do yourself.Typical cost: €20 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.