Diesel Direct Fuel Injection (DFI) system components, overview
WARNING: This page is about a different car, the 1999 Volkswagen Jetta, 1998 Volkswagen Jetta, and 1997 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
Components -A- through -D- below are not shown in Fig 1 .
- Brake light switch -F-, Brake vacuum vent valve switch -F47-
- Combined into one assembly in footwell on brake pedal
- Throttle Position (TP) sensor -G79-
- In footwell, on accelerator pedal, see ACCELERATOR PEDAL CONTROL, SERVICING
- Displayed as "Throttle position sensor-G69" in case of malfunction
- Clutch vacuum vent valve switch -F36-
- In footwell, on clutch pedal
- Barometric pressure (BARO) sensor -F96-
- Internal component of Diesel DFI Engine Control Module (ECM) -J248-
The following list pertains to Fig 1 .
- Wastegate bypass regulator valve -N75-
- - EGR vacuum regulator solenoid valve -N18-
- - Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) -J248-
- With Manifold Absolute Pressure (MAP) sensor -G71-
- With Barometric Pressure (BARO) sensor -F96-
- Exhaust Gas Recirculation (EGR) valve
- Fuel injector
- With needle lift sensor -G80-
- Coolant glow plug relay -J325-
- Intake Air Temperature (IAT) sensor -G72-
- Harness connector
- For needle lift sensor -G80-
- Harness connector
- Engine Coolant Temperature (ECT) sensor -G62-
- Central harness connector
For:
- Fuel temperature sensor -G81-
- Quantity adjuster -N146-
- Modulating piston displacement sensor -G149-
- Harness connector
- For fuel cut-off valve -N109-
- For cold start injector -N108-
- Injection pump quantity adjuster
With:
- Fuel temperature sensor - G81-
- Quantity adjuster -N146-
- Modulating piston displacement sensor -G149-
- Fuel cut -off valve -N109-
- Mass Air Flow (MAF) sensor -G70-