General Information

B1238 Ambient Temperature Sensor Open (High)

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

Air conditioner Control Module sets DTC B1238 if Ambient sensor has been detected over 4.9 V for 0.3 seconds.

DTC Detecting Condition





Specification

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






Diagnostic Circuit Diagram