Engine Controls - Insufficient A/C System Cooling

01 07 53

June 28, 2007

2015019

Condition

Update Programming, Air Conditioning Not Blowing Cold





Vehicle Information

Note:
DO NOT diagnose or replace Air Conditioning system before performing the update function as explained in this bulletin.

Technical Background

May be caused by the software of the Engine Control Module.
Production Solution

Improved software in the Engine Control Module resolves concerns related to:

^ Air conditioning not blowing cold due to idle speed.

^ Adjustment to increase idle speed.

Service

PROCEDURE:

Engine Control Module Update - Programming (Flashing) using Software Version Management (SVM)

Vehicle requirements

Battery MUST have minimum no-load charge of 12.5V (failure to maintain voltage during update process can lead to ECM failure) (use a Volkswagen approved Midtronics/InCharge 940 (INC-940) tester/charger to maintain
battery voltage).

VAS 5051: connected to vehicle and to 110V AC Power supply at all times during procedure.

VAS 5052: connected to vehicle with battery voltage requirements met.
Any appliances with high electromagnetic radiation (i.e. mobile phones) switched OFF.

When performing the update programming procedure, ALL DTCs for all systems are erased.

DTCs linked to Guided Fault Finding function tests will be lost.

Therefore, always address stored DTCs for Customer concerns unrelated to the update programming procedure first.

Note:
Nonobservance of the following points may lead to ECM failure! VAS 5051 or VAS 5052 must always be connected to the approved power supply at the approved voltages. Under no circumstances should the power supply be interrupted or the diagnostic connector unplugged during the update programming procedure. Any appliances with high electromagnetic radiation (i.e. mobile phones) must be switched OFF.

Tip:
The SVM Process must be completed in it's entirety so the database receives the update confirmation response. A warranty claim may not be reimbursed if there is no confirmation response to support the claim.
For further update instructions and troubleshooting, refer to SVM Technical Bulletin Instance 2014603, in ElsaWeb.





^ Update the Engine Control Module using the Software Version Management (SVM) and the SVM Unit code as listed in the table below:

^ If the vehicle has a tuned ECM or TCM, ensure the Control Module Tuning Form has been filled out.

Note:
An Update Programming procedure (flash) may overwrite any "TUNED" ECM or TCM programming. A "TUNED" ECM or TCM is described as any ECM or TCM altered so as to perform outside the normal parameters and specifications approved by Volkswagen of America, Inc.

Current Tuned ECM or TCM requirements: If you encounter a vehicle with a "Tuned" ECM or TCM, your dealership must do the following before performing any procedure that updates ECM or TCM programming:

^ Notify the owner that their ECM or TCM was found to have been tuned

^ Notify the owner any damage caused by the tuning of the ECM or TCM (including any adverse emissions consequences) will not be covered by Volkswagen of America, Inc. warranties.





^ Obtain the owner's written consent (see Control Module Tuning form) for any requested repair under warranty or outside warranty that requires flashing, which will automatically overwrite the "Tuned" program.





Warranty

Required Parts and Tools

No Special Tools required.

Additional Information

All part and service references provided in this Technical Bulletin are subject to change and/or removal.

Always check with Parts Dept. and Repair Manuals for the latest information.