A5 Quattro Coupe V6-3.2L (CALA) (2009)
Knock Sensor: Service and Repair
Knock Sensors
Electrical Connectors
1
To fuel injectors, cylinder bank 1
2
Throttle valve control module (J338)
3
Knock Sensor (KS) 1 (G61)
4
Oxygen sensor (G39)
5
Oxygen Sensor (O2S) behind Three Way Catalytic Converter (TWC) (G130)
Electrical Connectors
1
Knock Sensor (KS) 2 (G66)
2
Fuel injectors, cylinder bank 2 and from the fuel pressure sensor (G247)
Removing
CAUTION!
‹› Fuel system is under high pressure! Before opening high pressure components of the fuel injection system, pressure must be relieved
to residual pressure => [ Before Opening High Pressure Fuel Injection System ] See: Fuel Delivery and Air Induction/Fuel Filter/Fuel
Pressure Release/Service and Repair.
‹› Then wrap a clean cloth around the connection and relieve residual pressure by carefully loosening the connection.
‹› Observe safety precautions when disconnecting the battery.