Jetta L4-1.8L Turbo (AWD) (2000)
Engine Control Module: Adjustments
Relearn Procedure
If the voltage supply is interrupted, the engine control module loses all the "learned" and/or "basic" values. Therefore considerable driving characteristic
problems may occur depending on vehicle mileage.
Special tools and equipment
-
Scan tool VAG 1551 or vehicle system tester VAG 1552 with cable VAG 1551/3
Work sequence
Perform the following operations after voltage supply open circuit:
-
Switch ignition on for at least 10 seconds.
-
Switch off ignition.
-
Perform idling check. See: Fuel Delivery and Air Induction/Idle Speed/Testing and Inspection
NOTE: During idling check the activated charcoal filter solenoid valve and the air conditioner are switched off and the Oxygen sensor control learning
procedure is initiated.
-
Perform a longer test drive until the poor driving characteristics are eliminated.
During the road test the following operating conditions must be fulfilled:
-
The coolant temperature must exceed 80 °C.
-
When the temperature is reached, the operating conditions
Idling
Part throttle
Full throttle
Overrun
must be attained several times.
-
At full throttle the speed must exceed 3500 RPM.