General Information

Component Location





General Description

The ambient temperature sensor located at the center stay of the condenser detects ambient air temperature.
It is a negative type thermistor whose resistance is inversely proportional to temperature. Its output is used for sensor fail-safe, temperature regulation door lock, blower motor level control, mix mode control and in-car humidity control.

DTC Description

The ECM sets DTC B1237 if there is a short circuit in ambient temp sensor signal harness or the measured voltage value of the sensor is less than the threshold value (0.1V)

DTC Detecting Condition





Schematic Diagram





Signal Waveform

** Resistance value of ambient temp. sensor as a function of temperature.