Exhaust Flap Valve 1 (vehicles with engine code BJS), checking: Notes
WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 2005 Volkswagen GTI, 2004 Volkswagen R32, 2004 Volkswagen Jetta, 2004 Volkswagen GTI, and 2003 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
Function
Exhaust Flap Valve 1 -N321- is activated by Motronic Engine Control Module (ECM) -J220- depending on vehicle speed and the exhaust flap in rear muffler opens and closes via the vacuum control unit.
Exhaust flap is opened from a vehicle driving speed of approx. 60 km/h. When the speed is not reached, the exhaust flap is closed again.
Recommended special tools and equipment
- V.A.G 1526 multimeter or V.A.G 1715 multimeter
- V.A.G 1594 connector test kit
- Wiring diagram
Test requirements
- The respective fuses of Exhaust Flap Valve 1 -N321- must be OK:
Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations
- Ground (GND) connections between engine and chassis must be OK.
- Ignition switched off.
Test sequence
- Disconnect 2-pin connector from Exhaust Flap Valve 1 -N321-.
- Check resistance between terminals of solenoid valve.
Specified value: 31.5 to 38.5 Ω
If specified value is not obtained:
- Replace Exhaust Flap Valve 1 -N321-. Refer to Individual components of vacuum control unit .
- Erase DTC memory of Engine Control Module (ECM). Refer to Diagnostic mode 4: Reset/erase diagnostic data
- Generate readiness code. Refer to Readiness code, generating
If specified value is obtained:
- Check wires to control module according to wiring diagram. Refer to Check wires to control module .