P0535 · blink 44 – Air Conditioner Evaporator Temperature Sensor Circuit

System: Engine control (EFI)
Dashboard light: Check engine light (MIL)
Check-engine blink code: 44
Applies to: 1KR-FE: M300 (Sirion export = JDM Boon M300S/M301S(4WD? see gaps) & Passo KGC10/KGC15). JDM-spec ECU not separately documented | K3-VE: M301 (Sirion 1.3 = JDM Boon M310S? / Passo QNC10)
Description: Air Conditioner Evaporator Temperature Sensor Circuit
Detection / symptoms: Detection: 1.When the signals from the air conditioner evaporator temperature sensor are not outputted continu- ously over a certain length of time after starting with the air conditioner switch turned "ON"
Possible causes: Trouble area: 1.Air conditioner (A/C) evaporator temperature sensor 2.Open wire or short circuit for the air conditioner evaporator temperature sensor 3.EFI ECU
What to check: Checking points: 1.Are the signals from the air conditioner evaporator temperature sensor inputted to the EFI ECU? 2.Is the harness between the air conditioner evaporator temperature sensor and the EFI ECU normal? 3.Is the output of the air conditioner evaporator temperature sensor normal?
Confidence: high (factory manual, export spec)

From the factory service material. Clear the code and test-drive to confirm it returns. Search all fault codes · Common problems · Warning lights