Knock Sensor: Service and Repair

Knock Sensors

Electrical Connectors





1 To the fuel injectors, cylinder bank 1
2 Throttle valve control module (J338)
3 Knock sensor (KS) 1 (G61)
4 Heated oxygen sensor (G39)
5 Oxygen sensor after three way catalytic converter (G130)

Electrical Connectors





1 Knock Sensor (KS) 2 (G66)
2 Fuel injectors, cylinder bank 2 and from the fuel pressure sensor (G247)

Removing

• Fuel system is under high pressure! Before opening high pressure components of the fuel injection system, pressure must be relieved to residual pressure. Refer to => [ Before Opening High Pressure Fuel Injection System ] Service and Repair.

• Then wrap a clean rag around the connection and relieve residual pressure by carefully loosening the connection.

• Observe safety precautions when disconnecting the battery.

Remove the Right Cylinder Bank Knock Sensor.





4 Knock sensor (KS) 1 (G61)

• Remove fuel injector 2 to reach the bolt for the knock sensor (KS) 1 (G61) - 4 -.

- Remove the intake manifold. Refer to => [ Intake Manifold, Upper Section ] Intake Manifold, Upper Section.

- Remove the lower right intake manifold section with the fuel rail. Refer to => [ Lower Intake Manifold with Fuel Rail ] Lower Intake Manifold With Fuel Rail.

Remove the Left Cylinder Bank Knock Sensor.





5 Knock sensor (KS) 2 (G66)

• Remove fuel injector 2 to reach the bolt for the knock sensor (KS) 2 (G66) - 5 -.

- Remove the intake manifold. Refer to => [ Intake Manifold, Upper Section ] Intake Manifold, Upper Section.

- Remove each intake manifold section with the fuel rail. Refer to => [ Lower Intake Manifold with Fuel Rail ] Lower Intake Manifold With Fuel Rail.

Installing

- Install the removed knock sensor.

• Tightening specifications affects function of knock sensor (KS).

• Tightening specification, refer to => [ Ignition Overview ] Service and Repair

- Install the lower intake manifold section with the fuel rail. Refer to => [ Lower Intake Manifold with Fuel Rail ] Lower Intake Manifold With Fuel Rail.

- Reinstall intake manifold. Refer to => [ Intake Manifold, Upper Section ] Intake Manifold, Upper Section.