Needle lift 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 needle lift sensor signal is used to determine the start of injection. If it fails the start of injection switches to open-loop control (using engine speed and engine load). During normal operation the start of injection is controlled by a closed-loop function (using engine speed, engine load and engine coolant temperature).
NOTE:
- The gold-plated contacts must be used to repair terminals in the connector for the needle lift 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