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 MANUALSVOLKSWAGEN1999GTI (1W1) V6-2.8L (AAA)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSLOCATIONS
1999 Volkswagen GTI (1W1) V6-2.8L (AAA)
Computers and Control Systems: Locations
1999 Volkswagen GTI (1W1) V6-2.8L (AAA)SECTION Locations
Underhood View:
Component Locations, Overview:
1. Evaporative Emission (EVAP) canister purge regulator valve -N80-
- EVAP canister system
2. Mass Air Flow (MAF) sensor -G70-
3. Intake air duct
- With connection for Positive Crankcase Ventilation (PCV) heating element -N79-
4. Knock Sensor (KS) 1 -G61-
5. Engine Control Module (ECM) -J220-
6. Throttle valve control module -J338-
7. Ground (GND) connection
8. Ignition coil -N152-
9. A/C cut-out thermal switch -F163-, and third speed coolant Fan Control (FC) thermal switch -F165-
- Brown, 4-pin
- On vehicles with A/C
10. Engine Coolant Temperature (ECT) sensor -G62-
- Blue, 2-pin
- For Motronic ECM
11. After-run coolant Fan Control (FC) thermal switch -F87-, and Engine Coolant Temperature (ECT) sensor -G2-
- Yellow, 4-pin
12. Intake Air Temperature (IAT) sensor -G72-
13. Fuel pressure regulator
14. Engine speed (RPM) sensor -G28-
15. Knock Sensor (KS) 2 -G66-
16. Secondary Air Injection (AIR) pump motor -V101-
- Exhaust gas recirculation system
17. Fuel injectors
- Cylinder 1 -N30-
- Cylinder 2 -N31-
- Cylinder 3 -N32-
- Cylinder 4 -N33-
- Cylinder 5 -N83-
- Cylinder 6 -N84-
18. EVAP canister
- Below air cleaner
- EVAP system
19. Air cleaner (ACL)
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.