General Information

B1238 Ambient Temperature Sensor Open (High)

General Information

Component Location





General Description

The ambient temperature sensor is located at the center stay of the condenser 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 4.9 V for 0.3 seconds.

DTC Detecting Condition





Specification

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






Diagnostic Circuit Diagram