LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2019 >> Highlander Limited, FWD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Air Conditioning System (Manual A/C) - Diagnostic Codes & Circuit Tests - (Except Hybrid) >> AIR CONDITIONING SYSTEM (for Manual Air Conditioning System) >> DTC B1417: Evaporator Temperature Circuit [12/2013 - 11/2016] >> Description

DTC B1417: Evaporator Temperature Circuit [12/2013 - 11/2016]: Description

The No. 2 air conditioning harness assembly is installed on the evaporator in the rear 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 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 No. 2 air conditioning harness assembly and reads voltage changes as the resistance of the 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
  • No. 2 air conditioning harness assembly
  • Harness or connector between No. 2 air conditioning harness assembly and air conditioning amplifier assembly
  • Air conditioning amplifier assembly
Memorized
(4 sec. or more)*1
*1: The air conditioning amplifier assembly stores this DTC if the malfunction has occurred for the period of time indicated in the brackets.