Using A/C Control Panel Switches

While pressing and holding AUTO and fresh/recirculated air switches simultaneously, turn ignition on. See Figure. Indicators will flash on and off at one second intervals 4 times in succession. After indicator check is complete, system will automatically enter self-diagnostic mode. Press OFF button to cancel indicator check.
Stored trouble DTCs will appear in sequence on temperature display panel. See DIAGNOSTIC TROUBLE CODE DEFINITIONS table. Press front defrost switch to display DTCs one at a time. Press OFF button to exit self-diagnostics. To clear DTC(s), see CLEARING DIAGNOSTIC TROUBLE CODES .