Entering Functional Test

Start engine and set parking brake. Turn fan control switch on. Set temperature selector knob to full cold position and mode door selector knob to defrost position. The A/C switch can be in ON or OFF position. Depress and hold rear defogger switch. After 3-5 seconds, rear defogger LED will flash. Release button when LED begins to flash. System is now in functional test mode. If LED does not go out after approximately 30 seconds, go to FUNCTIONAL TEST step 1). If LED goes out after approximately 30 seconds, calibration is successful. Go to FUNCTIONAL TEST step 4).