B. Reprogram the HVAC Control Head Module (Using WiTECH)

1. Select the required wiTECH flash file from the list of flash files.

2. With the cursor over the desired flash file, click the small green arrow button on the right side of the screen.

3. Follow the wiTECH screen instructions.

NOTE:
The green circle lightning bolt on the "Vehicle View" screen illustration will remain illuminated for the HVAC module even after the flash has been performed. This is a normal condition. Do not flash the vehicle a second time.

4. Verify the HVAC control head part number. The new part number must be either 55111310AA or 55111309AA.

5. Clear all Diagnostic Trouble Codes (DTC's) using the following special procedure:

NOTE:
Due to the HVAC control head programming procedure, DTC(s) may be set in other modules (PCM, TCM, ABS, BCM, MIC, WCM, etc.) within the vehicle, if so equipped. Some DTC's may cause the MIL to illuminate.

a. A list of all active and stored fault codes will appear. Click the "X" in the upper right corner of the DTC pop-up screen.

b. Place the ignition in the "OFF" position and unplug the vehicle data link cable from the data link connector for one minute.

NOTE:
This will allow the CAN bus to "power down." This will also change the HVAC DTC from "Active" status to "Stored" status.

c. Reconnect the vehicle data link cable to the data link connector and place the ignition in the "Run" position.

d. Click the "OK" button.

e. Highlight the wiPOD being used from the list and click "NEXT".

f. Select the "All DTC" tab (if not already selected).

g. Click the "Clear All DTC's" button.

h. Click "OK" on the pop-up screen.

6. Turn the ignition to the "OFF" position and remove the wiTECH and battery charger from the vehicle.