DTC B1413: Evaporator Temperature Circuit or Evaporator Fin Thermistor [12/2019 - 11/2023]: Description

WARNING: This page is about a different variant/trim than selected.

The evaporator temp. sensor (No. 1 cooler thermistor) is installed to the evaporator in the air conditioner unit to detect the temperature of the cooled air that has passed through the evaporator, which is used to control the air conditioning system. It sends signals to the air conditioning amplifier assembly. The resistance of the evaporator temp. sensor (No. 1 cooler thermistor) changes in accordance with the temperature of the cooled air that has passed through the evaporator. As the temperature decreases, the resistance increases. As the temperature increases, the resistance decreases.

The air conditioning amplifier assembly applies voltage (5 V) to the evaporator temp. sensor (No. 1 cooler thermistor) and reads voltage changes as the resistance of the evaporator temp. sensor (No. 1 cooler thermistor) changes. This sensor is used for frost prevention.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Memory
B1413	Evaporator Temperature Circuit or Evaporator Fin Thermistor	Open or short in evaporator temperature sensor circuit	Evaporator temp. sensor (No. 1 cooler thermistor) Air conditioning harness assembly Air conditioning amplifier assembly	Memorized (4 sec. or more)*

*: The air conditioning amplifier assembly stores this DTC if the malfunction has occurred for the period of time indicated in the brackets.