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 DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESDIAGNOSTIC MODE, SELECTINGDIAGNOSTIC MODE 4: RESET/ERASE DIAGNOSTIC DATA
2000 Volkswagen GTI (1J1) L4-1.8L Turbo (AWD)
Diagnostic Mode 4: Reset/Erase Diagnostic Data
2000 Volkswagen GTI (1J1) L4-1.8L Turbo (AWD)SECTION Diagnostic Mode 4: Reset/Erase Diagnostic Data
Diagnostic Mode 04: Reset/delete diagnostic data
Diagnostic Mode 04 is used to reset or delete the following stored information:
- All emission related malfunctions in the DTC memory.
- The operating conditions at which a malfunction was stored will be reset.
- All adaptation values.
- The test results of all diagnostic functions.
Depending on scan tool and protocol used, the information displayed in diagnostic mode 04 may be referred to by different names such as Test-ID (TID), Hex-ID, Component-ID (CID), On-Board Diagnostic Monitor Identifier (OBDMID), or contain no name at all and be referenced by only a number.
Procedure
- Connect the scan tool.
- Switch the ignition on.
- Select "Diagnostic Mode 03: Interrogating fault memory".
- Then select "Mode 4: Reset/delete diagnostic data".
The scan tool will display: "Diagnostic data are being erased".
- Switch the ignition off.
- End of diagnosis.
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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.