Golf L4-1.8L Turbo (AWW) (2003)
Procedure After Voltage Supply Open Circuit
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 equipment
-
VAG1551 scan tool or VAG1552 mobile scan tool with VAG1551/3B cable
Work sequence
Perform the following operations after voltage supply open circuit:
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Switch ignition on for at least 10 seconds.
-
Switch ignition off.
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Perform idling check. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection
NOTE: During idling check the EVAP canister purge regulator valve and the air conditioner are switched off and the oxygen sensor control learning
procedure is initiated.
-
Perform a longer test drive until poor driving characteristics are eliminated.
Observe the valid safety precautions when carrying out a road test See: Powertrain Management/Computers and Control Systems/Service
Precautions/Technician Safety Information
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.
Engine Control Module (ECM), Coding
Engine Control Module, Coding
NOTE:
-
A 5-character code must always be displayed during the control module identification.
-
The control module must be recoded if the vehicle relevant coding is not displayed or the control module has been replaced.
Special tools and equipment
-
VAG1551 scan tool with VAG1551/3B cable
Work sequence
-
Connect VAG1551 scan tool (VAG1552). Switch ignition on and select engine control module with "Address word" 01. (Connecting scan tool
and selecting engine control module). Refer to "VAG1551 Scan Tool See: Powertrain Management/Computers and Control Systems/Tools and
Equipment
Indicated on display
Rapid data transfer
HELP
Select function XX
-
Press keys 0 and 7 for function "Code control module" and confirm entry with Q key.
Indicated on display
Coding Control module
Q
Enter code: number XXXXX
(0-32000)
-
Enter relevant code number for this vehicle and confirm with Q key.
Coding variations.