A/C - Does Not Cool Sufficiently/Evaporator Ices Up
NUMBER: 24-010-08GROUP: Air Conditioning
DATE: December 19, 2008
THE StarSCAN(R) FLASH FILES FOR THIS BULLETIN MUST BE RETRIEVED FROM THE INTERNET.
StarSCAN(R) SOFTWARE LEVEL MUST BE AT RELEASE 9.04 OR HIGHER.
StarMOBILE DESKTOP CLIENT MAY ALSO BE USED TO PERFORM THIS PROCEDURE. StarMOBILE STANDALONE MODE MAY ALSO BE USED TO PERFORM THE FLASH.
SUBJECT:
FLASH: Evaporator Freeze Up In A/C Equipped Vehicles
OVERVIEW:
This Bulletin involves reprogramming the Automatic Temperature Control module with new software.
MODELS:
2009 (HB) Durango (HEV Only)
2009 (HG) Aspen(HEV Only)
NOTE:
This bulletin applies to vehicles equipped with HEV engine (sales code EZE) and Automatic Temperature Control (ATC) ATC (sales code HAF).
SYMPTOM/CONDITION:
Some customers may experience an intermittent condition where air flow from the HVAC vents is warmer than desired while driving with the HVAC system on. This may be due to evaporator freeze up.
DIAGNOSIS:
Using a Scan Tool (StarSCAN(R)) using the appropriate Diagnostic Procedures available in TechCONNECT, verify all ATC systems are functioning as designed. If DTC's are present record them on a repair order and repair as necessary before proceeding further with this bulletin. If the Symptom/Condition is experienced or described by the customer, perform the Repair Procedure.
SPECIAL TOOLS / EQUIPMENT REQUIRED:
REPAIR PROCEDURE - USING THE INTERNET TO RETRIEVE THE FLASH FILE:
NOTE:
When performing this Repair Procedure, the software release level in the StarSCAN(R); must be programmed with 9.04 level software or higher. The software release level is visible in the blue header at the top of the StarSCAN(R) screen.
NOTE:
The StarSCAN(R) diagnostic scan tool fully supports Internet connectivity. However, to take advantage of this feature you must first configure the StarSCAN(R) for your dealership's network. Make sure the StarSCAN(R) is configured to the dealership's network before proceeding. For instruction on setting up your StarSCAN(R) for the dealer's network refer to either:
"DealerCONNECT > Service> StarSCAN(R) and StarMOBILE(R) tools > Online Documentation", or refer to the StarSCAN(R) Quick Start Networking Guide. The StarSCAN(R) Quick Start Networking Guide is also available on the website under the "Download Center".
NOTE:
If this flash process is interrupted/aborted, the flash should be restarted.
1. Install a battery charger and verify that the charging rate provides approximately 13.5 volts. Set the battery charger to continuous charge. Do not allow the charger to time out during the flash process. Remove the charger from the battery when the flash process is complete.
2. Connect the CH9410 StarSCAN(R) ethernet cable to the StarSCAN(R) and the dealer's network drop.
3. Connect the CH9404D StarSCAN(R) vehicle cable to the StarSCAN(R) and the vehicle.
4. Power ON the StarSCAN(R).
5. Turn the ignition switch on.
6. Retrieve the old HVAC part number. Using the StarSCAN(R) at the "Home screen:
a. Select "ECU View"
b. Touch the screen to highlight the HVAC in the list of modules.
c. Select "More Options"
d. Select "ECU Flash"
e. Record the part number at the top of the "Flash HVAC" screen for later reference.
f. Select "Browse for New File". Follow the on screen instructions.
g. Select "Download to Scantool".
h. Select "Close" after the download is complete, then select "Back".
i. Highlight the listed calibration.
j. Select "Update Controller". Follow on screen instructions.
k. When the update is complete, select "OK".
l. Verify the part number at the top of the "Flash HVAC" screen has updated to the new part number.
NOTE:
Due to the HVAC programming procedure, a DTC may be set in other modules (TCM, BCM, MIC, SKREEM, etc.) within the vehicle, if so equipped. Some DTC's may cause the MIL to illuminate. From the "Home" screen select "System View". Then select "All DTCs". Press "Clear All Stored DTCs" if there are any DTCs shown on the list.
7. Verify proper performance of HVAC system.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
FAILURE CODE:
Disclaimer:
This bulletin is supplied as technical information only and is not an authorization for repair.