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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 B147D-11: Rear Right Room Temperature Sensor Circuit Short to Ground [11/2023 - ] >> Description

DTC B147D-11: Rear Right Room Temperature Sensor Circuit Short to Ground [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 deck trim side panel assembly RH 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 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 DTC Output from Priority
B147D-11 Rear Right Room Temperature Sensor Circuit Short to Ground Diagnosis Condition:
  1. Ignition switch ON

Malfunction:

  1. Short (GND) in rear room temperature sensor circuit

Detection Time:

  1. Continuously for 4 seconds or more
  • No. 2 room temp. sensor (cooler thermistor)
  • Harness or connector
  • Air conditioning amplifier assembly
 Memorized Air Conditioner A
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