Lexus IS250 IS220d GSE20 ALE20 - AIR CONDITIONING
AIR CONDITIONING SYSTEM - CHECK MODE PROCEDURE
| LIST OF OPERATION METHODS |
By operating each of the A/C control switches as shown in the diagram below, it is possible to enter the diagnostic check mode.
| INDICATOR CHECK |
Turn the engine switch off.
Turn the engine switch on (IG) while pressing the A/C control "AUTO" switch and "R/F" switch simultaneously.
The indicator check is automatically performed when panel diagnosis is activated. Check that the indicators light up and go off at 1 second intervals 4 times in succession.
- HINT:
| DTC CHECK (SENSOR CHECK) |
Start the engine and warm it up.
Perform the indicator check.
- HINT:
- After the indicator check is completed, the system enters the DTC check mode automatically.
Push the "R/F" switch to perform the actuator check.
- NOTICE:
- HINT:
- When there are no problems, DTC 00 is output.
If the steps are difficult to read because they change automatically, push the "UPDr" switch to display the steps one at a time so that they can be read easily. The items are displayed step by step each time the "UPDr" switch is pushed.
Read the code displayed on the panel.
- HINT:
- Refer to the DTC chart (Diagnostic Trouble Code chart) for details of the codes .
| ACTUATOR CHECK |
Start the engine and warm it up.
Perform the indicator check.
Push the "R/F" switch to perform the actuator check.
- HINT:
- Be sure to perform the actuator check after starting the engine.
As the actuator check is repeated from steps 1 to 10 at 1 second intervals, check the temperature and air flow visually and by hand.
- HINT:
| Step No. | Display Code | Conditions | |||||
| Blower Level | Air Mix Damper | Airflow Vent | Air Inlet Damper | Cool Air Bypass Damper | Compressor | ||
| 1 | 0 | 0 | 0 % open | FACE | FRESH | -14 % | OFF |
| 2 | 1 | 1 | 0 % open | FACE | FRESH | -14 % | OFF |
| 3 | 2 | 17 | 0 % open | FACE | RECIRCULATION / FRESH | -14 % | ON |
| 4 | 3 | 17 | 0 % open | FACE | RECIRCULATION | 113.50 % | ON |
| 5 | 4 | 17 | 50 % open | B/L | RECIRCULATION | 113.50 % | ON |
| 6 | 5 | 17 | 50 % open | B/L | RECIRCULATION | 113.50 % | ON |
| 7 | 6 | 17 | 50 % open | FOOT | FRESH | 113.50 % | ON |
| 8 | 7 | 17 | 100 % open | FOOT-0 | FRESH | 113.50 % | ON |
| 9 | 8 | 17 | 100 % open | F/D | FRESH | 113.50 % | ON |
| 10 | 9 | 31 | 100 % open | DEF | FRESH | 113.50 % | ON |
If the steps are difficult to read because they change automatically, push the "UPDr" switch to display the steps one at a time so that they can be read easily. The items are displayed step by step each time the "UPDr" switch is pushed.
- HINT: