2001 Lexus GS 300 Reading Diagnostic Trouble Codes

Download NOTE: 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. 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) By operating each of the A/C control switches as shown in the diagram, it is possible to enter the diagnosis check mode. 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 and change it to step operation. Each time the Driver Side Temperature Control switch is pressed, the display changes by 1 step. a. Hook up the LEXUS hand-held tester to the DLC3. b. Read the diagnostic trouble codes by following the prompts on the tester screen. Please refer to the LEXUS hand-held tester operator’s manual for further details. Zoom Sized for Print HINT: W/EMV only If the buzzer sounds when a DTC is being read, it means the trouble indicated by that DTC continues to occur. If the buzzer does not sound when a DTC is being read, it means the trouble indicated by that DTC occurred earlier (such as poor connector contacts, etc.). Zoom Sized for Print 5. DTC CHECK USING LEXUS HAND-HELD TESTER 6. ACTUATOR CHECK