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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 91 (Heating / Air Conditioning System (HV) - Diagnostic Codes (2 Of 3)) >> AIR CONDITIONING SYSTEM (for HV Model) >> DTC P0535-11: Evaporator Temperature Sensor Circuit Short to Ground [11/2023 - ] >> Description

DTC P0535-11: Evaporator Temperature Sensor Circuit Short to Ground [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 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 DTC Output from Priority
P0535-11 Evaporator Temperature Sensor Circuit Short to Ground Diagnosis Condition:
  1. Ignition switch ON

Malfunction:

  1. Short (GND) in evaporator temperature sensor circuit

Detection Time:

  1. Continuously for 4 seconds or more
  • Evaporator temp. sensor (No. 1 cooler thermistor)
  • Air conditioning harness assembly
  • Air conditioning amplifier assembly
 Memorized Air Conditioner A
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