Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSVOLKSWAGEN2003GOLF (1J1) L4-1.9L DSL TURBO (ALH)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULETESTING AND INSPECTIONPROGRAMMING AND RELEARNINGDIESEL DIRECT FUEL INJECTION (DFI) ENGINE CONTROL MODULE -J248-, CODING
2003 Volkswagen Golf (1J1) L4-1.9L DSL Turbo (ALH)
Diesel Direct Fuel Injection (DFI) Engine Control Module -J248-, Coding
2003 Volkswagen Golf (1J1) L4-1.9L DSL Turbo (ALH)SECTION Diesel Direct Fuel Injection (DFI) Engine Control Module -J248-, Coding
Diesel Direct Fuel Injection (DFI) Engine Control Module -J248-, Coding
Diesel Direct Fuel Injection Engine Control Module -J248- must be recorded if vehicle code is not displayed or ECM has been replaced.
Special tools and equipment
- Scan Tool VAG 1551 or vehicle system tester VAG 1552 with cable VAG 1551/3
Work sequence
- Connect Scan Tool VAG 1551 (VAG 1552) and select engine electronics control unit with the "Address word" 01. When doing this the ignition must be switched on.
- Press -> button.
Indicated on display:
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -7- for the function "Code Diesel Direct Fuel Injection Engine Control Module -J248-" and confirm entry with -Q- button.
Indicated on display:
Code control unit Q
Input code number xxxxx (0-32000)
- Enter the appropriate code number and confirm with -Q- button.
Diesel Direct Fuel Injection Engine Control Module -J248-: 038 906 012 FD / 038 906 012 BD
Coding For vehicles with
00001 Automatic transmission, ABS, Airbag
00002 Manual transmission, ABS, Airbag
00004 Automatic transmission, Airbag
Diesel Direct Fuel Injection Engine Control Module -J248-: 038 906 012 FR / 038 906 012 BC
Coding For vehicles with
00002 Manual transmission, Airbag
00005 Manual transmission
Diesel Direct Fuel Injection Engine Control Module -J248-: 038 906 012 FE / 038 906 012 BR
Coding For vehicles with
00001 Automatic transmission, ABS
00002 Manual transmission, ABS
00004 Automatic transmission
Indicated on display when a non-authorized code number has been entered.
Function is not recognized or cannot ->
be performed at the moment.
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
- Switch ignition off and then on again.
NOTE: The coding entered will be activated by switching the ignition off and then on again. If after entering the valid code the ignition is not switched off and on again, the fault "Control unit incorrectly coded" in the fault memory cannot be erased.
- Check DTC memory and, if necessary, repair any malfunctions and then erase.
- Read-out the readiness code. If the DTC memory has been erased or the Diesel Direct Fuel Injection Engine Control Module -J248- was disconnected from permanent battery positive (B+), the readiness code must be generated again.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.