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 1 (G61)
4 Heated oxygen sensor (G39)
5 Oxygen sensor after three way catalytic converter (G130)

Electrical Connectors





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

Knock Sensor on the Right Cylinder Bank





4 Knock Sensor 1 (G61)

Knock Sensor on the Left Cylinder Bank





5 Knock Sensor 2 (G66)

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 ] Before Opening High Pressure Fuel Injection System.

• 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 upper section of the intake manifold. Refer to => [ Intake Manifold, Upper Section ] Intake Manifold, Upper Section.

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

• Injector valve 2 must be removed in order to get to the bolt on knock sensor 1 - 4 -. Injector valve 5 must be removed in order to get to the bolt on knock sensor 2 - 4 -.

- Remove the bolt on both knock sensors.

Installing

- Install the removed knock sensor.

• Tightening specifications affects function of knock sensor.

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

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

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