Section 69 (MULTIPORT Fuel Injection (MFI) - 2.8 L VR6 2V - AAA (A3 Platform))
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1999 Volkswagen Jetta, 1999 Volkswagen GTI, 1998 Volkswagen Jetta, 1998 Volkswagen GTI, and 1997 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
- Motronic Multiport Fuel Injection (MFI) and ignition system
- Component locations, overview
- General information
- Motronic Engine Control Module (ECM), Heated Oxygen Sensor (HO2S), Engine Coolant Temperature (ECT) sensor and engine speed (RPM) sensor, removing and installing
- Air cleaner (ACL), Mass Air Flow (MAF) sensor and Positive Crankcase Ventilation (PCV) heating element, removing and installing
- Fuel rail and intake manifold, removing and installing
- Throttle valve control module, removing and installing
- Safety precautions
- Rules for cleanliness
- Technical data
- Idle speed, checking
- Heated Oxygen Sensor (HO2S) and Oxygen Sensor (O2S) control, checking (before three way catalytic converter)
- Oxygen Sensor (O2S) heating, checking (before three way catalytic converter)
- Heated Oxygen Sensor (HO2S) 2 and Oxygen Sensor (O2S) control, checking (after three way catalytic converter)
- Oxygen Sensor (O2S) heating, checking (after three way catalytic converter)
- Oxygen Sensor (O2S) aging, checking (before three way catalytic converter)
- Engine operation, checking
- Mass Air Flow (MAF) sensor, checking
- Throttle valve control module, checking
- Notes
- Special tools, testers and auxiliary items
- Checking voltage supply
- Checking Closed Throttle Position (CTP) switch
- Continuation
- Checking Throttle Position (TP) actuator and Throttle Position (TP) sensor
- Evaluating display group 037
- Evaluating display group 036
- Checking Throttle Position (TP) sensor
- Evaluating display group 003
- Check wiring
- Basic setting, initiating
- Engine Coolant Temperature (ECT) sensor, checking
- Intake air temperature (IAT) sensor, checking
- Engine speed (RPM) sensor, checking
- Speedometer Vehicle Speed Sensor (VSS) signal, checking
- Engine Control Module (ECM) voltage supply, checking
- Signal from automatic transmission, checking
- Signal from A/C compressor, checking
- Fuel injectors, checking
- Fuel pressure regulator and residual pressure, checking
- Intake air system (outside air), checking for leaks