Knock Sensor Resistance Value

Very high combustion temperatures.

Knock sensor resistance value.

Turn on the power source. The knock sensor within your vehicle is a component designed to listen for engine detonation or knocking. Verify that the voltage at the sensor is within the range suggested in your user manual. Engine performance diagnostics chapter 10 pages 6 7.

If so we ve eliminated source voltage as the problem. Bad knock sensor symptoms. Consistent engine knock and associated sensor faults may cause the following symptoms. If not the voltage source is at least a problem if not the.

The knock sensor detects vibrations that come from a knock or an irregularity in combustion and send a signal to the engine control computer which then adjusts timing to correct the knock. This procedure applies to any knock sensor that has a bias voltage sent to it and is not unique to nissan. Since knock sensor is practically a microphone testing proper operation of is rather hard. I suppose you can compare voltage output of your sensor to.

A failed knock sensor will register a trouble code and illuminate the check engine lamp cel although some engines will require. Although you ll be able to tell if it s completely dead service manual calls for tapping on the side of the block with something metalic and making sure sensor outputs a knock reading. Detonation is the result of fuel and air mixture exploding quickly instead of burning evenly. Knock occurs if any of the following are present.

The test is very simple i have unplugged the sensor from the ecu plugged one probe form the multimeter set to capacitance range to the pin for the knock sensor on the ecu plug and another on chassis earth ground. Lean air fuel ratio causing high temperature. Carbon deposits pre igniting the air fuel mixture. Malfunction indicator lamp mil illumination.

The knock sensor is a crucial part of the engine as detonation is harmful to the engine. Other manufactures are doing the same thing making the circuit very easy to test.