2001 Lexus GS 300 L6-3.0L (2JZ-GE) - Reading Diagnostic Trouble Codes

This is the only information provided by the manufacturer for reading diagnostic trouble codes for this system. If compressor lock occurs during A/C operation, the A/C switch indicator on the A/C control assembly starts blinking.
1. WARNING FOR A/C COMPRESSOR LOCK
When this occurs, check for compressor lock (DTC B1422) using diagnosis trouble code check then proceed to inspect the circuit or the component. Compressor lock sensor circuit. (See DTC B1422 Compressor Lock Sensor Circuit)
2. LIST OF OPERATION METHODS
By operating each of the A/C control switches as shown in the diagram, it is possible to enter the diagnosis check mode
3. INDICATOR CHECK
a. Turn the ignition switch on while pressing the A/C control AUTO switch and R/F SW simultaneously.
b. Check that all the indicators light up and go off at 1 second intervals 4 times in succession.
a. Perform an indicator check. After the indicator check is completed, the system enters the DTC check mode automatically.
b. Read the DTC displayed on the panel. Refer to the list of DTCs when reading the DTCs (DTCs are output at the temperature display.). If the slower display is desired, press the Driver Side Temperature Control Switch
HINT: After the indicator check is ended, the diagnostic trouble code check begins automatically. Press the OFF switch when desiring to cancel the check mode.

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