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 MANUALSVOLKSWAGEN2000GTI (1J1) L4-1.8L TURBO (AWD)REPAIR AND DIAGNOSISBODY AND FRAMEBODY CONTROL SYSTEMSTESTING AND INSPECTIONCENTRAL LOCKING SYSTEM (VEHICLES WITHOUT POWER WINDOWS)ON BOARD DIAGNOSTIC FUNCTIONS
2000 Volkswagen GTI (1J1) L4-1.8L Turbo (AWD)
On Board Diagnostic Functions
2000 Volkswagen GTI (1J1) L4-1.8L Turbo (AWD)SECTION On Board Diagnostic Functions
01 - Check control module versions. Checking Control Module Versions (Function 01)
02 - Check DTC memory. Checking DTC Memory (Function 02)
03 - Output Diagnostic Test Mode. Output Diagnostic Test Mode (Function 03)
O5 - Erase DTC memory. Erasing DTC Memory (Function 05)
06 - Ending output. Ending Output (Function 06)
07 - Code control module. Coding Control Module (Function 07)
08 - Read measured value block. Read Measured Value Block (Function 08)
10 - Adaptation. Adaptation (Function 10)
NOTES:
- A list of possible functions is printed out after pressing the "HELP" button.
- Do not select further functions, which can be printed out after pressing the "HELP" button.
- After the function is completed the VAG 1551 returns to the start position.
Indicated on display
Rapid data transfer HELP
Select function XX
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.