Knock sensor wiring diagram - 2002 Lexus RX 300

I looked 03 honda crv, 2.4L engine. A four cylinder only has one bank. I looked at wiring diagram, it only showed one knock sensor. Hope this helps. It appears to be left of starter motor. If picture is incorrect, my bad.

Knock sensor is usually screwed firmly into the middle of the cylinder block just below the head gasket. To check the circuit you will need a wiring diagram for colour codes and a pinout diagram of the ECU.

The knock sensor is basically a listening device - a microphone and they are very reliable. I had to check one once which caused me some head-scratching. The only method available to me was a capacitance comparison with a known good one using an LCR bridge. It was of course ok.
These days many inexpensive multimeters have a capacitance range...

The two knock sensors are bolted into the cylinder block under the intake manifold. The two sensors share a common wiring harness using one electrical connector. Because of this, they must be replaced as a pair. 1 and 2 are the knock sensors in diagram below..

In a modern car, the crankshaft sensor serves only as an anti-knock sensor. When engine knock is detected the crank sensor sends its signal directly to the PCM. power control module. The wire from the sensor will undoubtedly lead through the firewall and into the PCM. If the wire has broken and you are trying to find the end, I would invest in a repair manual, Haynes has good manuals, with complete wiring diagrams. So the short answer is the wire goes to the engine control computer, the computer uses the signal to time the spark. When the engine knocks, the computer will slightly retard spark timing attempting to stop the knock. If the knock continues, the computer will light the check engine light and cause it to blink, indicating that engine damage is imminent.

Well i bought a book we have a 2009. Doesnt show the wiring diagram to the knock sensor, ones on used engine are cut and dont know which ones to wire them up too . any other suggestions

Looks like the wire from the sensor to the module is dark blue.
You can find the engine diagram on autozone's website under repair help.

Hello! Forget fuses...The Knock Sensor is designed to detect pinging..and the ECM adjusts the ignition timing and fuel mixture to prevent knocking to continue..
It is very difficult to replace ..however quite easy to test...Lets eliminate it first...See diagram below..Pull the connector plug and measure the Knock Sensors pin to ground (not the connector)..wire color is White...Two pins are shown in the diagram..your engine only has one pin...Set mutimeter on ohms...One meter probe on Knock sensor pin and the other on bare metal chassis ground..Knock sensor should read between 500k and 620K as in K=1000...send results...The use of a fuel too low in octane (a measurement of anti-knock quality) will result in spark knock...Send a comment with results and then we'll look at the idle air fault...Guru...saailer





I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

It does sound like the sensor may be bad, but you also need to check the wiring.
This information comes from:

http://www.obd-codes.com/p0325

P0325 OBD-II Trouble Code Technical Description

Knock Sensor Circuit Malfunction
What does that mean?

A knock sensor tells the engine computer when one or more of your engine's cylinders are "knocking", that is, exploding the air/fuel mixture in a way that delivers less power and can be damaging to the engine if prolonged. The computer uses this information to tune the engine so that it doesn't knock. If your knock sensor wasn't operating properly, so that it was always indicating a knock, the engine computer's response may have been to change the ignition timing on your engine. Knock sensors generally bolt into or thread into the engine block. This P0325 code may show up intermittently or the Service Engine light may be lit constantly. Other knock sensor related DTC codes include P0330.
FB.init("dd7d9e9681341cde77587bc6a2029f6f"); OBD-Codes.com on Facebook Symptoms

You may notice drivability problems including a lack of power and perhaps some hesitation. There may also be other symptoms.
Causes

A code P0325 most likely means one or more of the following has happened:

• The knock sensor is faulty and needs to be replaced
• There is a wiring short/fault in the knock sensor circuit

Possible Solutions

• Check the resistance of the knock sensor (compare it to factory specs)
• Check for broken/frayed wires leading to the sensor
• Replace the knock sensor

What do you mean the colors of the wires when the oxygen sensitive type NTK NO. (39210 - 23700)
Which means : signal,heater +,heater - , ....
the clor wire is :BLACK.WHITE,GREY,YELLOW AND BLUU
THANKS

knock sensor is on the block, looks like a bolt and has 2 wires coming out of it.