Operation CHARM: Car repair manuals for everyone.
Home >> Volkswagen >> 2000 >> GTI (1J1) L4-1.8L Turbo (AWD) >> Repair and Diagnosis >> Powertrain Management >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Testing and Inspection >> Programming and Relearning >> Relearn Procedure
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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. 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.
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