Test prerequisites
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Courtesy of VOLKSWAGEN UNITED STATES, INC.
- The main fuses must be OK.
- The battery voltage must be at least 11.5 V.
- If the vehicle is equipped with air conditioning, this must be switched off.
- Selector lever must be in position "P" or "N" on vehicles with an automatic transmission.
- Exhaust system between Three Way Catalytic Converter (TWC) and cylinder head must be free of leaks
- Ignition switched on, engine not running.
- Fuel Pump (FP) relay J17 must be OK., checking: → Electrical Wiring Diagrams, Troubleshooting and Component Locations
- The signal from Brake Light Switch F and Brake Vacuum Vent Valve Switch F47 F85 must be OK., checking → Brake Light Switch F and Brake Pedal Switch F47 signal, checking
.
- Engine Coolant Temperature (ECT) must be 85 to 110 ° C → display group 4, display zone 3.
- Intake Air Temperature (IAT) less than 80 ° C → display group 4, display zone 4.
- Three Way Catalytic Converter (TWC) temperature must be at least 380 ° C → display group 34, display zone 2.