Test 1A: Check Actual Value B4/3 (Fuel Tank Pressure Sensor)

Check actual value B4/3 (Fuel tank pressure sensor)

Figure legend





- 019 Vacuum tester
- Y58/1 (Purge control valve)

Test prerequisites
- Operate engine at idling speed.
- Coolant temperature > 80°C

Test sequence
- Switch off ignition.
- Detach purge line to activated charcoal filter at component Y58/1 (Purge control valve) and connect vacuum tester to purge line.
- Connect socket box.
- Switch on ignition.
- Use the vacuum tester to set a vacuum of 25 mbar.
- (4.37) 122<-->5 (5.5)

Communication with ECU required