GLI L4-2.0L Turbo (BPY) (2008)
/Page-88001.png)
Control Module: Customer Interest
Computer/A/T Controls - Harsh 1-2,2-3 Upshift/No DTC's
01 09 14
July 22, 2009
2020922
Vehicle Information
Condition
Update Programming Engine and Transmission Control Module for Intermittent Harsh 1-2, 2-3 Upshift
Customer may experience a harsh shift 1-2, 2-3 during acceleration from a stop, with 60-80% throttle. Under cold engine start up conditions, the problem
will appear less frequently than under normal operating temperature.
No DTCs are stored in the TCM/Mechatronics or the ECM for this complaint.
Comfort concern only.
Technical Background
Engine torque lowers after the 1-2, 2-3 up-shift is completed and the engine torque-reduction is the result of turbo charger boost pressure drop.
Production Solution
Software improvement.
Service
Update Programming Procedure
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.
