General Information

B1242 Evaporator Sensor Open (High)

General Information

Component Location





General Description

The Evaporator sensor is located on the AC/heater box and it detects the evaporator core temperature. When the core temperature is below the threshold value, the A/C ECU interrupts the compressor relay in order to prevent evaporator freezing.

DTC Description

DTC B1242 sets if Evaporator sensor signal is at or over 4.9 V for 0.3 seconds.

DTC Detecting Condition





Specification

** Resistance value of evaporator sensor as a function of temperature.






Diagnostic Circuit Diagram