General Information

Air Conditioner

B1257 AQS Sensor Open - General Information

Component Location





General Description

AQS (Air Quality System) keeps air inside in the most suitable state for driver. In polluted area AQS detects hazardous gas and intercepts inflow automatically, Inversely, In fresh area it allows the inflow of air to prevent the shortage of air and the accumulation of carbon dioxide. AQS sensor is located at front side of condenser and once hazardous gas is detected, it delivers the voltage signal to ECU for closing intake door.

DTC Description

Air conditioner Control Module sets DTC B1257 if Feedback signal of AQS sensor has been detected over 4.9 V for 0.3 seconds.

DTC Detecting Condition





Specification

** Voltage value of AQS sensor as a function of position of operating condition.





Preheating Time : (35 ± 2 sec.)

Diagnostic Circuit Diagram