DTC B1417: Evaporator Temperature Circuit [12/2019 - 11/2023]: Description
The rear evaporator temp. sensor (No. 2 air conditioning harness assembly) is installed on the evaporator in the rear cooling 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 rear evaporator temp. sensor (No. 2 air conditioning harness assembly) 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 rear evaporator temp. sensor (No. 2 air conditioning harness assembly) and reads voltage changes as the resistance of the rear evaporator temp. sensor (No. 2 air conditioning harness assembly) changes. This sensor is used for frost prevention.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Memory |
|---|---|---|---|---|
| B1417 | Evaporator Temperature Circuit | Open or short in rear evaporator temperature sensor circuit |
|
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.