Toyota 89615-06010 Knock Control Sensor

You can Select Your Vehicle to check if 89615-06010 fits your vehicle.

To replace the knock sensor, begin by releasing the pressure from the fuel system and disconnecting 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. As for the V6 engine models, remove the lower intake manifold. After that, unplug 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.

The knock sensor is located on the rear of the engine block, directly below the cylinder head. To replace it, first relieve the fuel system pressure, then disconnect the cable from the negative battery terminal. Next, drain the cooling system and remove the intake manifold to access the sensor. Disconnect the electrical connector, unscrew the mounting bolt, and remove the sensor. When installing the new knock sensor, ensure it is aligned parallel to the engine block, with the connector at no more than a 7-degree angle from a horizontal plane, and tighten the mounting bolt to 15 ft-lbs (20 Nm). Avoid overtightening to prevent damage, and complete the installation in reverse order. For testing, disconnect the knock sensor connector and use a Digital Volt Ohm Meter (DVOM) set to measure resistance between the two terminals of the knock sensor; with the engine cold (68 degrees-F), the resistance should be between 120k and 280k ohms.

The knock sensors on V6 models are located under the intake manifold, making them difficult to access. It is recommended to replace both sensors even if only one is defective. The process involves draining the coolant, removing the cylinder heads, disconnecting the electrical connectors, and carefully noting the sensor orientation. When installing the sensors, it is crucial to position them exactly as before. For VB models, the process varies 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 electrical connector, removing the retaining bolts, and then installing the sensors in reverse order. The engine cooling system also needs to be refilled.

The knock control system is designed to reduce spark knock during heavy detonation, allowing the engine to utilize optimal spark advance for improved driveability. The knock sensor detects abnormal engine vibrations and produces a voltage output that increases with the severity of the knock, which is monitored by the PCM to retard ignition timing until detonation ceases. The models in question use two knock sensors located under the intake manifold. To check a knock sensor, disconnect the electrical connector and verify that there is no continuity between the sensor terminal and the body of the sensor using an ohmmeter; continuity should not exist, and if it does, the sensor should be replaced. For replacement, first disconnect the cable from the negative terminal of the battery, then drain the cooling system, remove the lower intake manifold, disconnect the electrical connector, and remove the knock sensor. If reusing the old sensor, coat the threads with thread sealant, as new sensors come pre-coated. Install the knock sensor securely, approximately 30 ft-lbs, avoiding overtightening to prevent damage. Finally, reconnect the electrical connector, reinstall the remaining components, refill the cooling system, and check for leaks.

On four-cylinder engines, the knock sensor is located on the backside of the engine block, directly below the cylinder head (facing toward the rear of the engine compartment). On V6 engines, there are two knock sensors, one for each cylinder bank, located underneath the intake manifold.

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

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

The first step is to disconnect the cable from the negative terminal of the battery. If you're working on a V6 engine, you should also drain the cooling system.