Toyota 89615-06010 Knock Control Sensor

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When installing knock sensors on 2004 and later models, angle the electrical terminals slightly below the horizontal. Follow the reverse procedure for reassembly and ensure secure tightening of the knock sensors or retaining nuts.

The first step is to relieve the fuel system pressure and disconnect the negative battery terminal.

The knock sensors on V6 models are located on top of the engine block, under the intake manifold. Accessing these sensors is difficult as the cylinder heads need to be removed, so it is recommended to replace both knock sensors even if only one is defective. The process involves draining the engine coolant, removing the cylinder heads, disconnecting the electrical connectors from the knock sensors, and carefully noting their orientation before removing them. When installing the knock sensors, it is crucial to ensure they are positioned in the same exact position as before. The remaining installation steps are the reverse of removal, and the engine cooling system needs to be refilled. On VB models, the knock sensors are also located under the intake manifold, but the process may vary depending on the engine type. For 2UZ-FE engines, the air injection pump needs to be removed, while for 1UR-FE, 3UR-FE, and 3UR-FBE VB engines, there are four sensors. The steps involve removing the intake manifold, disconnecting the knock sensor electrical connector, removing the knock sensor retaining bolts, and then installing the sensors in the reverse order. The engine cooling system also needs to be refilled.

The knock sensors on V6 models are located on top of the engine block, under the intake manifold.

To replace the knock sensor in a vehicle, first relieve the fuel system pressure and disconnect the negative battery terminal. For four-cylinder models, remove the intake manifold and disconnect the electrical connector to access the knock sensor. Slide the sensor off the mounting stud, install the new sensor, and tighten the nut to 15 ft-lbs. For V6 models, remove the lower intake manifold and disconnect the knock sensor harness connector. Remove the sensors, clean the mounting surface, and install the new sensors. Tighten the bolts securely. In both cases, reinstall any parts that were removed and refill the cooling system.