U0532Invalid Data Received From Rain Sensing Module
- Generic OBD-II code · Network
- How the car detects it
- The rain sensing module behind the windshield measures how much infrared light wet glass scatters and, in most designs, also reads ambient light for automatic headlamps. Melexis describes such a unit as an optical front end, a microcontroller and a LIN system basis chip linking it to the body controller. U0532 is logged when that controller or a gateway receives the module's frames but rejects them, for example an impossible rain intensity, a parity or checksum error or a response of the wrong length. Jeep shows the related loss case: on the 2021 Grand Cherokee (WL) the body controller could store U0231-00 for the LIN rain sensing module without a MIL, corrected by a BCM flash (08-050-22, with sister bulletins for Wagoneer and 4xe). With bad data, automatic wipers fall back to manual or run at odd intervals.
- What you may notice
- Automatic wipers do not react to rain or wipe on a dry screen
- Automatic headlamps switch late, early or not at all
- Likely causes
- PossibleRain and light sensor electronics faulty
- PossibleSensor badly coupled to the glass or wrong variant after windshield replacement
- PossibleCorroded connector or chafed LIN wire at the windshield headliner
- RareBody controller software evaluating the sensor frames incorrectly
- Repair
- Medium · Often possible to do yourself.Typical cost: €0 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.