DTC B1419: Rear Room Temperature Sensor Circuit [12/2019 - 11/2023]: Description

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

The No. 2 room temp. sensor (cooler thermistor) is installed in the rear panel to detect the rear cabin temperature, which is used to control the air conditioning system. The resistance of the No. 2 room temp. sensor (cooler thermistor) changes in accordance with the rear cabin temperature. 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 No. 2 room temp. sensor (cooler thermistor) and reads voltage changes due to changes in the resistance of the No. 2 room temp. sensor (cooler thermistor).

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Memory
B1419	Rear Room Temperature Sensor Circuit	Open or short in rear room temperature sensor circuit	No. 2 room temp. sensor (cooler thermistor) Harness or connector 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.