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 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)

Right cylinder bank knock sensor





4 Knock Sensor (KS) 1 (G61)

Left cylinder bank knock sensor





5 Knock Sensor (KS) 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 ] 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 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.

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

• Remove fuel injector 2 to reach the bolt for the knock sensor (KS) 2 (G66) - 4 -.

- Remove the screws from each knock sensor.

Installing

- Install the removed knock sensor.

• Tightening specifications affects function of Knock Sensor (KS).

• Tightening Specifications. Refer to => [ Ignition Assembly Overview ] Service and Repair

- Install 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 upper section. Refer to => [ Intake Manifold, Upper Section ] Intake Manifold, Upper Section.