The Knock Sensor (KS) is used to detect engine detonation. It sends a voltage signal to the PCM. The knock sensor is able to provide a signal, which retards the ignition timing, as necessary.
Removal & Installation
- Remove the thermostat housing. Refer to the Thermostat procedure in the Engine Mechanical Section.
- Remove the lower intake manifold, as outlined in the Engine Mechanical Section
- Remove the coolant tube. Discard the O-ring.
- Disconnect the Knock Sensor (KS) electrical connector.
Remove the 2 bolts and the KS.
Installation is the reverse of the removal procedure, noting the following:
- Lubricate the new O-ring with clean engine coolant before installing it.
- Tighten the KS bolts to 20 Nm (15 lb-ft).
- Make sure the Knock Sensor (KS) is installed properly.
Disconnect the KS harness connector and measure the resistance between KS + and KS - on the component side. The resistance should read between 4.39-5.35 megaohms. If resistance reading is not within specifications suspect a faulty KS.