Mass Air Flow (MAF) sensor, checking: Notes
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2001 Volkswagen Jetta, 2001 Volkswagen Golf, 2000 Volkswagen Jetta, 2000 Volkswagen Golf, and 1999 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
The MAF sensor signal is used by the ECM to calculate the quantity injected and to control the required exhaust gas recirculation. The smaller the signal from MAF sensor the smaller the quantity of fuel injected.
NOTE:
- Only gold-plated contacts must be used to repair the terminals in the connector for the MAF sensor.
Special tools, testers and auxiliary items required
- V.A.G 1551/1552 with adapter cable V.A.G 1551/3
- Test box V.A.G 1598/22 (through my 1999)
- Test box V.A.G 1598/31 (from my 2000)
- Digital multimeter US 1119 (Fluke 83 or equivalent)
- Adapter set V.A.G 1594
- Wiring diagram