How to test knock sensor with multimeter. The oscillogram must produce a signal with considerably enlarged amplitude. How to Test a good and a bad knock sensor. Aug 18, 2018 · HOW TO TEST KNOCK SENSOR Voltmeter: https://amzn. . And then, it sends an electric signal to ECM (ENGINE CONTROL MODULE). Like. Remove the sensor from the car. The voltage of the knock sensor’s electric signal is proportional to the Sep 23, 2023 · You are watching: How to Check the Knock Sensor with Multimeter. 0l knock sensor with a multimeter. By definition, it means that the vehicles ECM/PCM isn’t getting the proper signal from the knock sensor. If you are not sure if you need a voltage divider, put a multimeter on the knock sensor output to measure it. Disconnect the appropriate sensor harness and check resistance, should be 93-107K ohms. Take your multimeter and clip its lead to the knock May 9, 2023 · The codes related to the knock sensor are usually P0325 or P0332. Some recommend banging on the sensor to simulate the mechanical stress the sensor measures in the engine. If it does, then the knock sensor is good. Start the engine or use a scan tool to simulate engine rotation. • check for a clean ground connection between the sensor on the engine block. What’s the highest voltage you are seeing? It is possible to test the knock sensor with a digital multimeter but because spikes are so fast it's even hard to tell if you're seeing something real on the digital read out. Switch your multimeter to the resistance setting. If not, the sensor is likely malfunctioning. Prior to you start examining the knock sensing unit, you’ll need the adhering to tools: Sep 20, 2021 · In this video I am showing how to test knock sensor. Now, gradually open the throttle valve. Testing the O2 Sensor: A DIY Walkthrough. When the ECM receives an electric signal, it retards the ignition timing or spark timing and prevents knocking within the engine. It can also result in a knocking or detonating engine in the worst case, but most often you will notice signs like loss of engine power and high fuel consumption. However, these codes do not necessarily mean that the knock sensor itself is faulty, as they could also indicate other problems, such as wiring issues or engine knock. By definition, P0327 means that the vehicles ECM/PCM is getting a signal that is lower than the defined operational range. Sep 20, 2023 · You are watching: How to Check Knock Sensor with Multimeter. Understanding that a digital voltmeter will only Dec 16, 2023 · Knock sensor wiring diagramKnock sensor resistance test How to check knock sensor with multimeter (guide)Knock sensor cylinder installation step oem applications block center used instructions. As the heart of the EGR system, the EGR valve reduces the overall NOx emissions that leave the tailpipe. Test the Resistance. You will be able to send if the kno Dec 28, 2023 · To test the resistance of a knock sensor, you’ll need a digital multimeter (DMM) capable of measuring high resistance values. 3. Here’s how a knock sensor works. By measuring the voltage or frequency output of the MAF sensor, you can assess its performance. Start the scope to see live data. Step 5: Connect the Multimeter to the Sensor. It should increase to 5 volts when you open the throttle plate. Oct 22, 2020 · 3. Tools Called For to Check a Bad Knock Sensor with A Multimeter. Dec 30, 2010. Oct 1, 2020 · 3&4 If you think your knock sensor will be outputting more than 2 volts at peak output, you should make a voltage divider to reduce the voltage going to your laptop’s mic socket. Here’s a step-by-step guide on how to perform the test: Set up your multimeter : Set your multimeter to the lowest DC volts setting, typically 200 mV or 2 V. p0327, p0332 code diagnosis. Unusual engine noises. How to test a 4. You should see a short burst of voltage. Set the multimeter to measure resistance, select the lowest resistance range, and put the red test lead on the positive battery terminal and the black test lead on the negative. For the hell of it I decided to bypass the knock sensor with a 560k resistor as some have done before (knowing full well that I was not getting a knock sensor code) and reset the computer. During Nov 8, 2022 · Now, turn on the ignition switch and start the engine, double-check that your throttle plate is closed completely. 8l 5. It converts vibrations into an alternating current (AC) signal. Mar 9, 2023 · Symptoms Of A Bad Knock Sensor. It’s about to get scientific. Clearing this code typically requires a new knock sensor or correcting. Generally, it is positioned on the engine block or cylinder head. Below are some usual signs of a faulty knock sensor: – Check Engine Light – Engine Misfires – Engine Stalling – Greater Discharges – Enhanced Fuel Usage. A good sensor will read from 0 to 5 volts depending on how strong you tap it. Parts 3 and 4 will be the resistors you need. Jul 7, 2023 · If you watch that link in the video he was securing the sensor in the vise and hitting the vise with a sledge hammer and getting above 1 bolt on the good sensor. I also replaced the connector, from Napa, for the rear sensor when I replaced both sensors. Connect your digital multi meter (DMM Mar 29, 2019 · A knock sensor receives a quick bias voltage from the ECM at startup, but that’s just to test the integrity of the connection. When the knock sensor fails, you will hear loud noises from the engine, almost like thumping. Be very careful around moving parts as you do this. Connect PicoScope channel A to the Sensor output circuit. Using a multimeter, you can also test the knock sensor’s resistance. This is my idea of testing the knock sensor harness connectionTurn key to on position, get test light, Ground it on the battery, then put probe in harness and hope the light comes on. (although you'll be able to tell if it's completely dead. Then start the engine. Briefly open the throttle valve. 2. Mar 15, 2020 · Hello. The knock sensor is located on the engine block, cylinder head, or intake manifold. Observe the AC Signal: Monitor the AC signal on the multimeter. Thus, the cam sensor should be tested with a multimeter and other sensors. The greater the vibration or shock, the higher the voltage and frequency. how to tell if your knock Nov 3, 2022 · Is there a way to test the knock sensor? There are a few ways to test the sensor. Jul 22, 2022 · Now let’s know how to test a knock sensor with a multimeter. Set your multimeter to resistance. If the signal is not clear, tap gently against the engine block near the sensor. Sep 20, 2023 · Video how to test camshaft position sensor with multimeter. Below we have a more detailed list of the signs of a bad or Dec 31, 2010 · 1. Jan 2, 2024 · Set your multimeter to DC volts and backprobe the sensor. This can be a clean surface on the engine, a metal bracket, or the battery negative (-) post. Aug 16, 2014 · Let's interpret your test results: CASE 1: The multimeter showed 10 to 12 Volts. Note that most car sensors have a reference supply of 5 volts, but the MAF sensor needs 12 volts. Other manufactures are doing the same thing, making the circuit very easy to test. Experts recommend you check your knock sensor Feb 19, 2023 · Locate your vehicle's knock sensor on the engine manifold. Test the Voltage Mar 6, 2017 · Here I show how to test a car sensor, like a knock sensor, crank sensor, o2 sensor, and more. We will check all three connectors in turn. One way is to use a multimeter test to measure the resistance of the sensor. First, apply the handbrake and stop the engine. Look to see if the timing slows down on the timing light. Sep 7, 2023 · Signs of a Faulty Knock Sensor. #4 · Jun 12, 2013. Sep 15, 2023 · To test a knock sensor with a multimeter, disconnect the sensor, set the multimeter to the ohms (Ω) setting, and measure the sensor's resistance. WOW!!! Jun 24, 2023 · A faulty knock sensor can manifest through symptoms such as: Decreased engine performance. Step 2. to/3z1PdxaFlexible Backprobe Feb 10, 2011 · MidWest. Here are the steps Feb 27, 2023 · If you notice a decrease in your car’s overall performance, it could indicate a faulty knock sensor. The second most common cause is a short or break in the From my understanding the knock sensor is a specialised condenser microphone. Nov 14, 2023 · The knock sensor detects engine cylinder vibrations caused by knocking and sends an electric signal to the ECM (Engine control module). If not, it needs to be replaced. There should be less than 2 ohm Ω worth of resistance present at this pin. Then, carefully tap the engine block near the knock sensor using a ball-pein hammer. It has the same meaning for the Toyota Rav4 as it would any other vehicle. Step Three: Connect the red lead to the knock sensor connection port. Sep 24, 2008 · 9/23/08 6:20 PM. Step 4. e. It should typically read around 500-700 ohms when not knocking and a significant decrease in resistance when knocking occurs, but it's best to consult the manufacturer's specifications for your HOW TO TEST AND INSPECTION KNOCK SENSOR TOYOTA Camry#HowToTestKnockSensor#MayoCarsDR Jan 27, 2006 · Since knock sensor is practically a microphone, testing proper operation of is rather hard. The longer you wait to fix this problem, the louder those sounds will become. COPYRIGHT DISCLAIMER - Copyright Disclaimer under Section 107 of the copyright act 1976, allowance is mad Apr 3, 2024 · Identify the wires: Consult your repair manual to identify the power and ground wires on the sensor connector. Watch this car repair tutorial video that demonstrates how to test and replace your vehicle's knock sensor. Turn the ignition switch to the “On” position, but do not start the engine. Unplug the sensor’s electrical connector. The result was a severe low power condition at times. Hold the multimeters against the knock sensor. You will be testing PIN A to determine whether or not your sensor is any good. • check for any cracks in the casing of the sensor which would make it susceptible to moisture. The computer's reaction was to retard ignition timing in an attempt to quiet the knock sensor down. Start by warming up the engine and letting it idle. Connect the red multimeter test lead to the male terminal that connects to the dark blue (DK BLU) wire of the connector. Connect the testing probe with the pin of the control unit and the ground (which is the vehicle’s body). Now set the multimeter to the DC volts position and turn the car’s ignition to the second position. what does a knock sensor do. Place one probe on one contact and the other on the second contact. Now open the hood and when it opens, start the engine. You will need to know the ohms of a good sensor in order to run Feb 20, 2024 · Step 1. Oct 21, 2022 · In this video we explain how to test a relay with a multimeter in just one minute. Engine Performance Diagnostics chapter 10 pages 6-7. how does a knock sensor work. Refer to your Honda Civic’s service manual to identify the exact location of the knock sensor. Using a multimeter, touch one probe to the connector on the knock sensor and the other to a metal portion of the body of the sensor. A lack of continuity would indicate a faulty sensor. That’s the ECM sending a bias voltage to test the sensor. Connect the test probes of the oscilloscope between the control unit pin for the knock sensor and ground. From that point on, the sensor doesn’t require any voltage. Then connect the black lead to the knock sensor housing on the other end of the knock sensor. • you can do a continuity test to determine if there is a fault wire within the circuit. Dec 27, 2010 · hey steve i went through the same problem a couple of months back, i removed the cats on my truck and the left bank o2 sensor was out i brought the truck over to chevy to get the check engine light read and they told me the knock sensor was bad and the o2 sensor the mechanic replaced the o2 sensor and reset the check engine he told me you will get a false reading with the knock sensor when the Dec 12, 2023 · Test Voltage. Step 3. Jun 20, 2023 · Using a multimeter, test the resistance of the knock sensor. #1. Connect an Analog Multimeter: Hook up an analog multimeter, preferably an AC milliamp meter, to the knock sensor input wire. Please consult your sensor’s user manual or Jan 28, 2023 · Simple easy knock sensor testing. 6 Replies. 3 posts · Joined 2013. No, Take off the manifold and test for an open or short to ground in the signal circuit between the knock sensor (KS) jumper harness connector, on the left side of the intake and KS connector. While directly testing a knock sensor can be tricky, there are a few tests that can be done to verify the sensor’s general functionality. A new knock sensor (optional) Ohmmeter (optional) Step-by-Step Guide to Testing a Knock Sensor. Testing: First, use a multimeter to measure the sensor’s resistance by attaching it to one of the connectors. 3L Supercharged. The Mass Airflow (MAF) sensor is a critical component Sep 6, 2007 · can it be tested off the car, i. You will be checking this pin for continuity and your engine ground. You can test this sensor with a multimeter. This article teaches how to test a 3-wire Cam sensor with a multimeter. It’s playing hide and seek, but you’ll find it. Read the resistance and compare to carmaker specs. The knock sensor is connected with a wire harness coming out of the top. 3l ls1 6. A knock sensor is used to notify the computer of pre-ignition and detonation (knock) events. It is a sensor that detects the vibrations or knocking in the engine… Jan 17, 2020 · P0327 is a powertrain related OBD-II trouble code. Think of it as disconnecting a plug. 3l vortec. Activated check engine light. When the crystal inside the sensor is vibrated, it produces an AC voltage. This method provides valuable information for diagnosing potential issues and ensuring proper engine functionality. If you detected a P0325 code reading on the OBD2 Scanner means that there is a malfunction within the knock sensor 1 in ci **Want to own the tools I use ?? Click on the amazon link below to get my top 5 Tools I use**Automotive Test Light- https://amzn. The sensor should detect the artificial knock and you should observe a decrease in engine RPM as the timing is Step 4. If the engine is very hot, wait until it cools down. poor fuel economy (2-3 mpg less than normal) Jan 25, 2019 · P0330 is a powertrain OBDII trouble code that has the same meaning for the Buick Enclave as it would any other vehicle. Strike the side of the engine with the hammer while shining the timing light on the timing indicator at the bottom of the engine block. Locate the knock sensor of your vehicle on the engine manifold. If the reading is outside of the recommended range, the knock sensor may be faulty and needs to be replaced. Jan 17, 2022 · How to bench test your knock sensor. Apr 6, 2024 · 3. Connect the red probe to the + wire going to the sensor, and connect the black probe to the ground wire going to the sensor. Another way is to use an oscilloscope to test the output of the sensor and the third way is by doing a visual inspection. Also, test the voltage of wires in the sensor connector. This engine had a slight rod knock or upper engine noise that was causing the knock sensor to record a false signal. If you find that the wiring harness is ok, and the code is still persistently registering, it is time to test and/or replace your 500’s knock sensor. To confirm that the knock sensor is the culprit, you will need to test it with a multimeter. Taping the end of a socket extension close to the knock sensor while it's on the engine will result in a mild response. If the engine is knocking (pinging), then this test result lets you know that the source of the problem is an engine mechanical problem. Check engine light is on with code P0327 (knock sensor 1 circuit low). They can also take a little digging to get to, which makes replacing it the way to go. Before I take off the intake and replace it, I was wondering if someone could tell me what steps to do to verify it's the actual sensor itself and not something else. CASE 2: The resistance of knock sensor 2 IS NOT within the indicated range. Step 4: Set Your Multimeter. With our tools in hand, let’s get down to testing! Here’s a step-by-step guide to using a multimeter to diagnose your knock sensor: Park Safely and Prepare: Find a level surface, engage the parking brake, and turn off the engine. You will see that PicoScope has displayed an example waveform and is preset to capture your waveform. to/3PPZNzP Insulated Glo Nov 14, 2023 · A failing or bad knock sensor is a tell-tale sign of a damaged engine. Note: Communication wiring is often more complicated than a + wire and a – wire, and will vary according to the output of your sensor, and your control system. If the resistance is out of spec or the test shows an open or short to ground, replace the sensor. Minimize the help page. Follow these steps to test your knock sensor: Turn off the engine and disconnect the negative battery cable. There’s a piezoelectric crystal inside the sensor that generates an AC voltage when it’s compressed by engine Nov 24, 2015 · Get your multimeter and turn the knob to test for continuity and unplug your Mitsubishi Eclipse Knock Sensor. , just by measuring it with the multimeter? OR should it be screwed on the block and attached to the APC? I have it off and according to the Bentley it should produce small voltage measured on the contacts when taping the sensor Jan 25, 2019 · P0330 is a powertrain OBDII trouble code that has the same meaning for the Chevy Impala as it would any other vehicle. 7/15/10 8:33 AM. Poor fuel economy. Step 7: Read the Voltage. Clearing this code typically requires a new knock sensor. Procedure: • first check for any breaks or corroded wiring/plug connections. The second most common cause is a short or break in the How to perform the test. I suppose, you can compare voltage output of your sensor to Sep 23, 2023 · You are watching: How to Check the Knock Sensor with Multimeter. The DK BLU wire is identified with the letter A in the photo above. Follow these steps: Set the multimeter to voltage (V) mode. Nov 4, 2022 · In this video I will show you how to test for bad knock sensor using a multimeter. ) Service manual calls for 'tapping' on the side of the block with something metalic, and making sure sensor outputs a knock reading. Knowing the sound of a bad knock sensor will enable you to salvage your engine from further deterioration. Hi Rob, is the right hand terminal of the OEM knock sensor connected to the metal body? 45w. Then give the sensor some taps. Sensor knock gmTwo tips for knock sensor diagnosis Knock sensor resistance testSensor knock test resistance voltage gm single wire cadillac dvom use unplug put probe near gmforum. 2 to 1. Testing the Knock Sensor with a Multimeter: A Step-by-Step Guide. The second most common cause is a short or break in the wiring Mar 7, 2024 · The knock sensor picks up on these unusual noises or vibrations from the engine and transmits a signal to the engine control unit (ECU) to potentially adjust the ignition timing (the moment when a Feb 29, 2024 · Handy Extras. CalebS Discussion starter. Most modern knock sensors are piezoelectric. Step 6: Start the Engine. Take your multimeter and clip its lead to the knock Jun 11, 2013 · NEW - 2002 Xterra SE SC 3. View 1 more comment Jan 6, 2022 · This 2004 Chevy V8 truck cannot pass NYS Emissions Inspection because the Check Engine light is ON setting a persistent "P0327 - Knock Sensor Bank 1" trouble Jul 14, 2023 · Quick Read: Yes, you can check a Mass Air Flow (MAF) sensor with a multimeter. Connect the multimeter probes: Touch one probe to the power wire and the other probe to the ground wire. The most common symptom of a bad knock sensor is a check engine light on your dashboard. 4. There are three steps to testing the EGR valve: checking DTCs, carrying out a visual inspection, and testing the valve itself. I believe the voltage is going to be higher the harder you hit. Use manufacturer's data to identify the knock sensor output circuit. If the voltage doesn’t match the specifications, the ECM will set a knock sensor code. The next step is to remove the intake Aug 2, 2023 · This calls for the following steps. View connection guidance notes. The location will vary slightly by manufacturer; refer to your repair manual for an exact diagram. I've read several forums where people replaced both Turn the ignition key to the On position, but don't start the engine. Since it know the resistance value of the wiring and sensor, it expects to see a certain return voltage. Touch the DMM black lead to ground. 6 days ago · #6 – Check Knock Sensor With Meter. If the ohms are OK, 2. A bad cam sensor can make the engine lose power, poor mileage, staling, and slow acceleration. This step is crucial to isolate the sensors from the rest of the system, ensuring accurate testing. Nov 3, 2022 · The testing procedure is given below: First of all, arrange an oscilloscope for the testing of the knock sensor, which must have a probe with it to connect to the knock sensor. Disconnect the wiring harness from the knock sensor by pulling on the base of the wiring harness where it contacts the knock sensor. So they will give off voltage based on mechanical interaction. There are guides out there on how to test a knock sensor, but they are very affordable. Jan 18, 2020 · Knock Sensor. A resistance of 2,000 to 3,000 ohms is ideal. Quick steps to test parking aid sensor. In addition to resistance, test the voltage output of the CKP sensor to ensure it generates the correct signal. Take a multimeter and connect its wire to the knock sensor. Jun 18, 2023 · To test a knock sensor using a multimeter, you’ll need the following tools and equipment: Multimeter (digital or analog) Wrench set. The component is found on the engine manifold, mounted beneath the intake manifold in the middle of the engine. If the resistance is outside this range, it could indicate a bad knock sensor. To test the knock sensor, follow the below steps. Once you have located the knock sensor, inspect the wiring harness connected to it for any signs of damage or wear. You should get a reading close to the specified resistance value indicated in Feb 28, 2023 · The knock sensor is an essential component of modern-day engines, as it helps prevent engine damage due to detonation or knock. Step 4: Perform a Aug 18, 2023 · Manual Testing. have had several knock sensor codes this past week, all showing bank 2 low input. If the voltage is outside of the manufacturer’s specifications, the knock sensor may need to be replaced. Touch the multimeter's negative lead to a grounding point, such as the negative battery terminal. Jan 25, 2019 · P0330 is a powertrain OBDII trouble code that has the same meaning for the Saturn Outlook as it would any other vehicle. to/2KplXWfTesting a knock sensor on a modern car is not an easy thing. If you see the voltage, then you can rule out a wiring issue or connector issue from the ECM to the sensor. This test result generally lets you know that knock sensor 2 is bad and needs to be replaced. Step 2: Ensure Safety. check engine light with a P0328 trouble code. Step 1: Locate the O2 Sensor. A multimeter can be used to measure between the 2 wires tied to this sensor while checking continuity. The reading should be within the manufacturer’s specifications. Jul 27, 2022 · On startup, the ECM sends a bias voltage to the knock sensor. terminal (ground). Consult your car’s owner’s manual to Jan 30, 2021 · Knock sensor Nissan 2 wire testing use Fluck multimeter#automotiveinfo #knocksensor#nissan#fluck#multimeter Jul 26, 2022 · A knock sensor is a piezoelectric accelerometer that acts as a microphone on the engine. And it is really easy to do. 🔔 Tools used in video: Multimeter: https://amzn. This procedure applies to any knock sensor that has a bias voltage sent to it and is not unique to Nissan. Find the knock sensor on your engine. Thus I came to conclusion it is possible to test it with a multimeter that has c Dec 15, 2023 · Sensor knock troubleshooting v8 pico signals known information background good automotiveKnock sensor test bad Knock sensor worksKnock sensor works. The first reading value displayed by your multimeter should be approximately 0. The ECM can look at the output from the Mar 10, 2023 · How to quickly check if a knock sensor is working with a multimeter. Knock sensor code -trouble code meaning, causes-symptoms, fixesKnock coolant burp doityourself Knock sensorKnock sensor location. Touch the DMM red lead to each of the sensor wires on the harness connector you just unplugged. Check all of the wiring if there is Mar 19, 2024 · Isolate the Sensors: Use a screwdriver to remove the sensor wiring from the garage door opener. If you're getting P0325, P0327 and P0330 codes this video will help fix th If you are turning imports away because your techs lack the training and expertise to diagnose and repair these vehicles, then you are missing out on a signi Oct 18, 2022 · Initial knock sensor testing Test the knock sensor resistance. Remove the sensor and get a multimeter. Probe the wiring connectors and measure the output voltage in AC millivolts. Mar 6, 2022 · Locate the Knock Sensor Input Wire: Identify the specific wire that connects the knock sensor to the ECM, as this will be the point of measurement. 5 volts depending on the model of your multimeter. It is the device that detects the vibration of the engine cylinder due to knocking. Common symptoms of a bad EGR valve include a lit check engine light, engine performance problems, and spark knock. The main take away with this case study is for low power complaints, don't Apr 24, 2020 · Power, ground and signal testing is shown in this video and can be applied to ALL hall effect type sensors. This is the correct test result and lets you know all is good in this circuit and the CKP sensor is getting power. Locate the knock sensor. Connect the black probe to the ground terminal (top/center) and the red probe to the live terminal (right). Aug 15, 2023 · Step 2: Detect the Power Supply. Step 3: Disconnect the Sensor. Connect the multimeter leads to the CKP sensor terminals. Please like and subscribe for more content. A fine car parking sensor will have around 10k ohm. Jun 20, 2020 · How to test a 4. Step Two: Set your multimeter to measure resistance. One of the simplest ways to test a knock sensor is through manual testing. Another way to test the crankshaft sensor with a multimeter is by checking the output voltage with the engine cranking. This comprehensive guide will delve into the intricacies of a knock sensor, signs of its failure, and ways to test, repair, and replace it. You will need an assistant to do this. May 16, 2014 · I am leaning towards harness now since It did it with the old knock sensor and the new one. Mar 13, 2024 · This can be done using a multimeter or an oscilloscope to measure the sensor’s output voltage. Signal not clear. Nov 14, 2020 · Today ill teach you how to do this May 18, 2022 · An easy way to test your knock sensor is using a multimeter. I have a 2004 silverado with the 5. The next step is to make sure its Ground circuit is OK too, go to: TEST 2: Verifying The Crank Sensor Is Getting Ground. Step One: Locate and remove the suspected bad knock sensor. Typically, this reading is around 200 millivolts, but this Nov 12, 2023 · How To Test A Knock Sensor. The resistance should be between 4-8 ohms. Disconnect the wire harness from the knock sensor by pulling on the harness base at the point it meets the sensor. 1. Test Sensor Resistance: Place the multimeter probes on the sensor wires. Once you extract the codes from the vehicle and realize that troubleshooting begins with the knock sensors, there is a quick test that you can perform to find out if your knock sensors are working properly. Set the multimeter to measure resistance and touch the probes to the knock sensor terminals. 0l knock se P0332 Knock sensor test with DVOM-HOW TO TEST KNOCK SENSOR Multimeter. NOTE: This test is done on the knock sensors jumper wiring harness connector that has male spade terminals. If light comes on then yay I have power. I am wondering if I have a bad sensor or connection, or if there is a problem in the wiring. I replaced both sensors about 4 months ago. Check the electrical contacts connected to the knock sensor to see if the appropriate resistance is there. Jun 24, 2023 · Step 3: Locate the Knock Sensor. The components required are; Multimeter, ECU, and a Knock sensor. zo re rm hg pa sy mp rh pf rq