CHECK MODE PROCEDURE
REFRIGERANT SHORTAGE CHECK IN NORMAL OPERATION (CHECK A/C SWITCH INDICATOR AND DTC)
(a) Start the engine.
(b) Check that the A/C switch indicator remains on when the following conditions are met.
*a | A/C Switch (Multi-display) |
Item | Condition |
---|---|
A/C switch | On |
A/C operation time | 15 minutes or more |
Ambient temperature* | 0 to 49°C (32 to 120°F) |
Engine coolant temperature | 45°C (113°F) or more |
*: If the ambient temperature is not within the range shown, do not perform this check.
HINT:
The A/C switch indicator and air conditioning system turn off if the amount of refrigerant in the system is insufficient.
(c) Connect the Techstream to the DLC3.
(d) Check for DTC B14B8.
Click here
Result | Amount of Refrigerant | Corrective Action |
---|---|---|
DTC B14B8 is output | Empty or nearly empty | Check for refrigerant leaks using a halogen leak detector, and repair if necessary. Click here |
DTC B14B8 is not output | Correct or insufficient | Perform a refrigerant shortage check using the Techstream. |
REFRIGERANT SHORTAGE CHECK USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Air Conditioner / Utility / Refrigerant Gas Volume Check.
Body Electrical > Air Conditioner > Utility Tester Display |
---|
Refrigerant Gas Volume Check |
(e) According to the display on the Techstream, perform the refrigerant shortage check when the following conditions are met.
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.
HINT:
Result | Amount of Refrigerant | Corrective Action |
---|---|---|
Refrigerant shortage | Insufficient or leakage |
|
Refrigerant correct | Correct | - |
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Telematics System: Problem Symptoms Table
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Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Lighting System (w/ Automatic Headlight Beam Level Control System): CAN Communication Failure (Message Registry) (U1000)
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