Front Window Fogging [07/2022 - ]: Procedure
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus UX 250h, 2023 Lexus UX 250h, 2022 Lexus UX 250h, 2021 Lexus UX 250h, and 2020 Lexus UX 250h. However, it is still accessible from the selected car via links, so may be relevant.
- PERFORM REFRIGERANT SHORTAGE CHECK
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Enter the following menus: Body Electrical / Air Conditioner / Utility / Refrigerant Gas Volume Check.
Body Electrical > Air Conditioner > Utility
Tester Display Refrigerant Gas Volume Check - Check that the following conditions are met and perform the refrigerant shortage check according to the display on the Techstream.MEASUREMENT CONDITION:
Item Condition A/C switch On Ambient temperature* 0 to 49°C (32 to 120°F) Blower speed HI *: If the ambient temperature is not within the range shown, do not perform this check.
Result
Result Amount of Refrigerant Refrigerant correct Correct Refrigerant shortage Insufficient OK
"Refrigerant correct" is displayed on the Techstream.
Result
Proceed to OK NG
Result:
NG
CHARGE SYSTEM WITH REFRIGERANT
for HFC-134a(R134a): Refer to REPLACEMENT [07/2022 - ]
for HFO-1234yf(R1234yf): Refer to REPLACEMENT [07/2022 - ]
Result:
OK
See step 2
- CHECK OPERATION
- Press the front defroster switch on the air conditioning control assembly.
OK
The air outlet mode changes to DEF mode.
Result
Proceed to OK NG
Result:
OK
INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET
for HFC-134a(R134a): Refer to ON-VEHICLE INSPECTION [07/2022 - ]
for HFO-1234yf(R1234yf): Refer to ON-VEHICLE INSPECTION [07/2022 - ]
Result:
NG
GO TO DTC B1443. Refer to DTC B1443: Air Outlet Damper Control Servo Motor Circuit [10/2020 - ]
- Press the front defroster switch on the air conditioning control assembly.