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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 B1474-4B: A/C Inverter Cooling/Heating Over Temperature [11/2023 - ] >> Description

DTC B1474-4B: A/C Inverter Cooling/Heating Over Temperature [11/2023 - ]: Description

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

The temperature sensor of the compressor with motor assembly detects the A/C inverter temperature.

If the temperature exceeds the maximum, operation of the compressor with motor assembly will be stopped, and this DTC will be stored.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory DTC Output from Priority
B1474-4B A/C Inverter Cooling/Heating Over Temperature Diagnosis Condition:
  1. Ignition switch ON

Malfunction:

  1. A/C inverter temperature is outside the specified range (temperature too high)

Detection Time:

  1. -
  • Cooling fan system
  • Refrigerant volume
  • Compressor with motor assembly
Memorized Air Conditioner A