Lexus RX (RX 350L, RX450h) 2016-2026 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) 2016-2026 Owners Manual > Steps to take in
an emergency: If a warning light turns on
or a warning buzzer
sounds
Calmly perform the following actions if any of the warning lights comes
on or
flashes. If a light comes on or flashes, but then goes off, this does not
necessarily
indicate a malfunction in the system. However, if this continues to occur,
have the vehicle inspected by your Lexus dealer.
Warn ...
Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Safety Connect System: Indicator (Green) Circuit Short to Ground (B157111,B157113)
DESCRIPTION This DTC is set when the DCM (telematics transceiver) detects an open or short in the manual (SOS) switch green indicator circuit of the manual (SOS) switch. The manual (SOS) switch green indicator illuminates after the engine switch is turned on (IG). If the safety connect system is not ...
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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