General Information

Air Conditioner
B1257 AQS Sensor Open - General Information

Component Location





General Description

The 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. The AQS sensor is located at front side of condensor and once hazardous gas is detected, it delivers the voltage signal to ECU for closing intake door.

DTC Description

DTC B1257 sets if AQS sensor signal is at or over 4.9V 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