Jetta GLS L4-1.9L DSL Turbo (ALH) (2001)
Engine Control Module: Service and Repair
Diesel (DFI) Engine Control Module -J248-, Replacing
With Manufacturer's Scan Tool
Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) -J248-, Replacing
Special tools and equipment
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Scan Tool (ST) V.A.G 1551 with cable V.A.G 1551/3
Removing
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Print out Engine Control Module (ECM) -J248- identification and previous ECM code as follows:
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Connect Scan Tool (ST) V.A.G 1551/1552.
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Press -0- and -1- buttons to select Address word 01: "Engine Control Module (ECM)".
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Switch ignition on.
Scan Tool (ST) V.A.G 1551 display will show Engine Control Module (ECM) identification, e.g.:
038906018M 1.91 R4 EDC G00AG 1813 ->
Coding XXXXX
WSC XXXXX
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Print out Engine Control Module (ECM) -J248- identification by pressing Scan Tool (ST) print button.
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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.
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Switch off ignition.
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Remove wiper arms and cowl panel:
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Remove connector from Engine Control Module (ECM) -J248-.
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Press securing tab -arrow- to left and pull Engine Control Module (ECM) -J248- out.
Installing
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Place new Engine Control Module (ECM) -J248- into retaining frame.
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Install Engine Control Module (ECM) -J248- connector and lock.
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Check previous code and new Engine Control Module (ECM) -J248- code, See: Testing and Inspection/Programming and Relearning
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Check DTC memory, if necessary, repair malfunctions and erase DTC memory, See: Computers and Control Systems/Testing and Inspection
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Set readiness code.
With Generic Scan Tool
Control module for Diesel-Direct Fuel Injection System, replacing
Work procedure
First, check the control module identification of the previous control module for Diesel-Direct fuel injection system as follows:
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Connect diagnostic tester.
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Switch ignition on.