Jetta Wagon L4-1.9L DSL Turbo (ALH) (2003)
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Engine Control Module: Service and Repair
With Manufacturer's Scan Tool
Diesel Direct Fuel Injection (DFI) Engine Control Module -J248-, replacing
Special tools and equipment
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Scan Tool VAG 1551 with cable VAG 1551/3
Work sequence
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First print out the control unit identification and thereby the previous control unit coding as follows:
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Connect Scan Tool VAG 1551 (VAG 1552) and select the engine electronics control unit with the "address word" 01; Connecting Scan Tool and
selecting engine electronics control unit. See: Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble
Codes/Scan Tool Connecting/With Manufacturer's Scan Tool/Connecting VAG 1551 Scan Tool
The Scan Tool VAG 1551 display will show the control unit identification, e.g.:
038906018D 1.9l R4 EDC G00SG 1817
->
Coding 0002
WSC XXXXX
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Print out the control unit identification by pressing the Scan Tool print button.
Only for vehicles from model year 2002 >
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Press -> button.
Indicated on display:
3VWSP69M92M000069
VWZ7Z0A3452852 ->
Continued for all vehicles
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Press -> button.
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Press buttons 0 and 6 for the function "End output" and confirm entry with the Q button.
Indicated on display:
Rapid data transfer HELP
Select function XX
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Switch off ignition.
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Remove wiper arms and plenum cover:
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Release connector from control unit and pull off.
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Press the securing tab -arrow- to left and pull the control unit out.
Installing
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Place the new control unit into the retaining frame.
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Install control unit connector and lock.
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Check the previous coding and the coding of the new control unit
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Match engine control unit to electronic immobilizer.
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Check DTC memory and, if necessary, repair any malfunctions and then erase. See: Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Reading Diagnostic Trouble Codes/With Manufacturer's Scan Tool
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes