Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Check Mode Procedure
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.
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| 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:
- Refer to the Techstream operator's manual for further details.
- A message indicating a refrigerant shortage is displayed on the Techstream and the air conditioning system turns off if the amount of refrigerant in the system is insufficient.
- DTCs are not stored when performing the refrigerant shortage check using the Techstream.
| Result | Amount of Refrigerant | Corrective Action |
|---|---|---|
| Refrigerant shortage | Insufficient or leakage |
|
| Refrigerant correct | Correct | - |
Terminals Of Ecu
TERMINALS OF ECU AIR CONDITIONING AMPLIFIER ASSEMBLY (w/o Rear Air Conditioning System) *A w/o Seat Heater *B w/ Seat Heater HINT: Check from the rear of the connector while it is connect ...
Dtc Check / Clear
DTC CHECK / CLEAR DTC CHECK USING TECHSTREAM (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Ai ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Telematics System: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspect ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Lighting System (w/ Automatic Headlight Beam Level Control System): CAN Communication Failure (Message Registry) (U1000)
DESCRIPTION The No. 1 headlight ECU sub-assembly LH stores this DTC if it detects an internal malfunction related to the CAN communication system. for Multiple Beam Headlight DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from U1000 CAN Communication Failure ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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