B1275Średni
Usterka obwodu pozycji 'OFF' przełącznika świateł głównych. Układ sterowania oświetleniem nie wykrywa prawidłowo sygnału wyłączenia świateł.
Nadwozie
Sprawdź szczegóły →B1270
ŚredniShort to Power Supply in the Defrost Servo Motor Potentiometer Circuit. The fault concerns the HVAC climate control system – specifically the air mixing flap control circuit.
OBD-II (EN): Defrost Motor Potentiometer Circuit Short to Battery
Code B1270 indicates a short to power supply in the potentiometer circuit of the servo motor responsible for defrosting in the HVAC system. It most often manifests as incorrect climate control operation or lack of window defrost function. Diagnosis by a mechanic using an OBD-II scanner is recommended, as determining the specific cause requires electrical measurements and knowledge of the specific vehicle model's schematics.
Symptoms
- Incorrect heating or climate control operation (lack of temperature regulation) - Air mixing flap stuck in a fixed position (e.g., only cold or only hot air) - Lack of rear or front window defrost function - Climate control fault indicator or MIL may be illuminated - Noises or lack of movement from the servo motor in the dashboard
Possible causes
- Damaged or shorted HVAC flap servo motor potentiometer - Open circuit or short to +12V in the defrost circuit wiring harness - Corrosion or damage to the servo motor electrical connector - Damaged climate control module (HVAC control module) - Mechanical jamming of the mixing flap causing motor overload
Affected systems
HVAC (ogrzewanie i klimatyzacja)Układ odszraniania szybSilniczek serwomechanizmu klapy mieszającejModuł sterowania klimatyzacją
Related codes
Suggested Hybspec services
Based on the systems affected by this code, we will most likely start with:
Does code B1270 require professional diagnostics?
The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.