1. To enter cool-down test, set parking brake. Ensure evaporator is at room temperature. Start and warm engine to normal operating temperature. With engine idling, turn blower switch to high. Turn mode switch to PANEL. Open all A/C outlets. Move temperature lever to full cold.
2. Press and hold rear WASH and A/C buttons simultaneously for 5 seconds (until all LEDs illuminate). All LEDs should illuminate for 5 seconds. A/C and RECIRC button LEDs will alternately flash during cool-down test. If A/C and RECIRC button LEDs begin flashing simultaneously, cool-down test has failed.
3. After approximately 60 seconds, if only rear WIPER button LED is flashing, calibration is successful and system is okay. If rear WIPER and rear INTERMITTENT WIPER button LEDs are flashing simultaneously, Diagnostic Trouble Codes (DTCs) are present in HVAC control module.
Monday, February 16th, 2009 AT 7:24 PM