A/C Switch Indicator does not Turn On [10/2018 - 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.
- CHECK MALFUNCTION STATUS
- Check the malfunction status of switch indicators on the air conditioning control assembly.
Result
Result Proceed to Indicators are not always illuminated A Indicators are not illuminated only immediately after starting the engine B
Result:
B
GO TO INITIALIZATION. Refer to INITIALIZATION [10/2018 - ]
Result:
A
See step 2
- Check the malfunction status of switch indicators on the air conditioning control assembly.
- READ VALUE USING TECHSTREAM
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Enter the following menus: Body Electrical / Air Conditioner / Data List.
- Read the Data List according to the display on the Techstream.
Body Electrical > Air Conditioner > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note Ambient Temp Sensor Thermistor assembly Min.: -23.30°C (-9.94°F)
Max.: 65.95°C (150.71°F)Actual ambient temperature displayed Thermistor assembly circuit malfunction - When open circuit: -23.30°C (-9.94°F)
- When short circuit: 65.95°C (150.71°F)
Body Electrical > Air Conditioner > Data List
Tester Display Ambient Temp Sensor OK
The value displayed is 0°C (32°F) or higher.
Result
Proceed to OK NG
Result:
OK
INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET. Refer to ON-VEHICLE INSPECTION [10/2018 - 07/2022]
Result:
NG
GO TO OTHER DIAGNOSIS PROCEDURE (Ambient Temperature Display System). Refer to Ambient Temperature Display System [10/2018 - ]