General Information

Air Conditioner
B1238 Ambient Temperature Sensor Open (High) - General Information

Component Location





General Description

The ambient temperature sensor is located at the center stay of the condensor and detects ambient air temperature. It is a negative type thermistor whose resistance is inversely proportional to the 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

DTC B1238 sets if Ambient Temperature sensor signal is at or over 4.9V for 0.3 seconds.

DTC Detecting Condition





Specification

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






Diagnostic Circuit Diagram