Toyota 89615-12090 Knock Control Sensor

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. In four-cylinder engines, the knock sensor is located on the backside of the engine block, directly below the cylinder head, while V6 engines have two knock sensors located underneath the intake manifold, one for each cylinder bank. To begin, disconnect the cable from the negative terminal of the battery, and if working on a V6 engine, drain the cooling system. For four-cylinder engines, pinch off the coolant hoses to the throttle body before removing the intake manifold/throttle body. After removing the intake manifold, disconnect the electrical connector and remove the knock sensor; for V6 engines, the sensors are under the intake manifold, while for four-cylinder engines, the sensor is screwed into the side of the block below the intake manifold. If reusing the old sensor, coat the threads with thread sealant, but do not apply additional sealant to new sensors as they are pre-coated. Install the knock sensor securely, tightening it to approximately 30 ft-lbs without overtightening to avoid damage. Finally, plug in the electrical connector, refill the cooling system, and check for leaks, ensuring that on 3MZ V6 models, the knock sensors are turned so the connector ends point toward the timing belt end of the engine for easier harness hookup.

The knock control system is designed to reduce spark knock by detecting abnormal engine vibration through a knock sensor, which produces a voltage output that is monitored by the PCM. The system retards ignition timing until the detonation ceases, allowing for optimal spark advance and improved driveability. To check a knock sensor, disconnect the electrical connector and use an ohmmeter to check for continuity between the knock sensor terminal and the body of the sensor. If continuity exists, replace the sensor. To replace the knock sensor, disconnect the battery cable, drain the cooling system, remove the intake manifold on V6 models, disconnect the electrical connector, and remove the sensor. When installing a new or reused sensor, ensure it is securely tightened (approximately 30 ft-lbs) and the threads are coated with thread sealant as necessary. Refill the cooling system and check for leaks.

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.

An ohmmeter is used to check continuity between the knock sensor terminal and the body of the sensor.

82219-07010

89615-12090 82219-07010

ONLY A SINGLE SENSOR

THAT IS A SINGLE SENSOR

IT IS JUST THE SENSOR (1)

THAT IS JUST THE KNOCK CONTROL SENSOR NO WIRING

just one sensor

no sold separately buy one two or as many as you like not a set no harness at all sensors (2) 89615 12090 harness (1) 82219 07010

89615-12090 QTY 2 82219-07010 QTY 1

Part number: 89615-12090 is for 1 sensor only.

Yes, this harness is for both sensors