Lexus Troubleshooting Questions? Ask a Lexus Expert
Ok, lets check for fault codes - follow directions below(fault codes will display where the temperature normally displays). Write down the fault code numbers and post them here for me
INDICATOR CHECKa. 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.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.ACTUATOR CHECKa. After entering the sensor check mode, press the R/F switch.b. Since each damper, motor arid relay automatically operates at 1 second intervals beginning in order from 20 in the temperature display, check the temperature and air flow visually and by hand.If a slower display is desired, press the A/C switch and change it to step operation. Each time the A/C switch is pressed, the display changes by 1 step.HINT:- Code are displayed in order from the smaller to the larger numbers.- To cancel the check mode, press the Off switch.