Jetta SportWagen L4-2.0L DSL Turbo (CBEA) (2009)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
Computers/Controls - Update ECM For OBD Optimization
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June 30, 2009
2020606
Vehicle Information
Condition
Update Programming - Engine Control Module (ECM) for OBD Function Optimization
With the presence of any P-code (with or without MIL-ON) in the ECM fault memory, update Engine Control Module (ECM) Programming for OBD -
Function Optimization.
Note
Technical Background
Software improvement to optimize OBD function.
In rare cases, loss of OBD In-use monitor performance rate counters after DTC clearing due to a project specific software error in the data writing
routine.
Software improvement.
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.