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 MANUALSVOLKSWAGEN2003GTI (1J1) L4-1.8L TURBO (AWP)REPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSCLIMATRONIC CONTROL MODULE -J255- CODING (FUNCTION 07)
2003 Volkswagen GTI (1J1) L4-1.8L Turbo (AWP)
Climatronic Control Module -J255- Coding (Function 07)
2003 Volkswagen GTI (1J1) L4-1.8L Turbo (AWP)SECTION Climatronic Control Module -J255- Coding (Function 07)
Climatronic Control Module -J255- Coding (Function 07)
NOTE:
- Each replacement Climatronic control module -J255- must be coded after installing.
- Perform Basic setting (function: 04) after coding.
- The A/C control head - E87 flashes for 15 seconds when the control module -J255 has not been coded.
- If the appropriate vehicle code or the appropriate equipment level is not displayed, the control module must be coded as follows:
- Connect VAG 1551 Scan Tool (ST), enter address word 08 "AC/Heating electronics" and press until "Select function XX" appears in display. Initiating and Checking Control Module Versions
Indicated on display:
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -7- to select function 07 Code control module.
Indicated on display:
Rapid data transfer Q
07 - Code control module
- Press -Q- button to confirm entry.
Indicated on display:
Coding control module Q
Enter code number XXXXX (0-32000)
- Using scan tool button pad, enter code number and confirm entry with - Q- button.
Coding For vehicles
01000 All USA/CDN
Indicated on display:
Coding control module Q
Enter code number 01000 (0-32000)
- Press -Q- button to confirm entry.
The VAG 1551 Scan Tool (ST) display will show the control module coding and the part number.
3B1 907 044 A SXX ->
Coding 01000 WSC XXXXX
- Press -> button.
Indicated on display:
Rapid data transfer HELP
Select function XX
- Select End output (function 06). End Output (Function 06)
NOTE: The code entered and shown on the display will not be loaded into the Climatronic control module until the ignition has been switched off once.
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.