Touareg V8-4.2L (AXQ) (2006)
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PROM - Programmable Read Only Memory: Customer Interest
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
