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 MANUALSVOLKSWAGEN2002GOLF GLS, 2.0 K, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 99 (2.0L - GENERIC SCAN TOOL, ENGINE CODE(S): AEG (A4 PLATFORM))
2002 Volkswagen Golf GLS, 2.0 K, Standard
Section 99 (2.0L - Generic Scan Tool, Engine Code(S): AEG (A4 Platform))
2002 Volkswagen Golf GLS, 2.0 K, StandardSECTION Section 99 (2.0L - Generic Scan Tool, Engine Code(S): AEG (A4 Platform))
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2001 Volkswagen Jetta, 2000 Volkswagen Jetta, 2000 Volkswagen Golf, 2000 Volkswagen GTI, and 1999 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
- 20 - Fuel supply
- 24 - Multiport Fuel Injection (MFI)
- Motronic fuel injection system, servicing
- Components, checking
- Oxygen Sensor (O2S) Heater Z19 heater circuit, checking
- Oxygen Sensor (O2S) 1 (behind Three Way Catalytic Converter (TWC)) Heater Z29 , checking
- Mass Air Flow (MAF) Sensor G70 , checking
- Throttle Valve Control Module J338 , checking
- Positive Crankcase Ventilation (PCV) Heating Element N79 , checking
- Engine Coolant Temperature (ECT) Sensor G62 , checking
- Intake Air Temperature (IAT) Sensor G42 , checking
- Engine Speed (RPM) Sensor G28 , checking
- Fuel Injectors N30, N31, N32, N33 , checking
- Fuel Pump (FP) Relay J17 checking
- Function tests
- Motronic Engine Control Module (ECM) J220
- Additional signals (engine), checking
- 26 - Exhaust system, Emission controls
- 28 - Ignition/Glow plug System
- 38 - Automatic Transmission - Gears, Hydraulic Controls
- Electrical components for 4 Spd. Automatic Transmission 01M, checking
- Electrical components for 4 Spd. Automatic Transmission 01M, checking
- Multi-Function Transmission Range (TR) Switch F125 , checking
- Transmission Vehicle Speed Sensor (VSS) G38 , checking
- Vehicle Speed Sensor (VSS) G68 , checking
- Transmission Fluid Temperature Sensor G93 , checking
- Solenoid Valves in Valve Body , checking
- Transmission Control Module (TCM) J217
- Additional signals (Automatic Transmission), checking
- Electrical components for 4 Spd. Automatic Transmission 01M, checking
- ST - Generic Scan Tool
- On Board Diagnostic (OBD)
- Diagnostic modes
- Diagnostic Modes Description
- Diagnostic Mode 01: Obtain data
- Diagnostic Mode 02: Obtain operating conditions
- Mode 03: Interrogating fault memory
- Interrogating the Fault Memory
- Diagnostic Mode 04: Reset/delete diagnostic data
- Diagnostic Mode 05: Check lambda test results
- Diagnostic Mode 06: Checking test results of components that are not continuously monitored
- Diagnostic Mode 07: Check test results of components that are continuously monitored
- Diagnostic Mode 08: Tank leak test
- Diagnostic Mode 09: Vehicle information
- General Diagnosis
- Readiness Code
- Diagnostic Trouble Code (DTC) tables
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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.