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\u00a9 2021 wikiHow, Inc. All rights reserved. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Continuity refers to how much resistance there is in a closed electrical current. Engine Computer, PCM/Engine Control Module/ECU Control Module — Using a Scanner. Prepare a digital multimeter (DMM) to measure the resistor. For step 3 of you diagnostics, you can use a tool such as a scanner. When doing a visual inspection you want to start out by inspecting the PINs. For multi-functional meters, you will see a "common," or negative plug, and a "positive" plug. Touch the multimeter probes to the circuit board test points if you're measuring voltage. M signifies 1 million. You want to confirm whether the Injectors/Fuel Pump is all getting signals, whether you have Spark, and whether or not the Starter is getting a signal. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/3\/34\/Test-Continuity-with-a-Multimeter-Step-6.jpg\/v4-460px-Test-Continuity-with-a-Multimeter-Step-6.jpg","bigUrl":"\/images\/thumb\/3\/34\/Test-Continuity-with-a-Multimeter-Step-6.jpg\/aid11307865-v4-728px-Test-Continuity-with-a-Multimeter-Step-6.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

\u00a9 2021 wikiHow, Inc. All rights reserved. The continuity doesn’t need to be 0 to be safe though. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/b\/b0\/Test-Continuity-with-a-Multimeter-Step-12.jpg\/v4-460px-Test-Continuity-with-a-Multimeter-Step-12.jpg","bigUrl":"\/images\/thumb\/b\/b0\/Test-Continuity-with-a-Multimeter-Step-12.jpg\/aid11307865-v4-728px-Test-Continuity-with-a-Multimeter-Step-12.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

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\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/0\/0b\/Test-Continuity-with-a-Multimeter-Step-10.jpg\/v4-460px-Test-Continuity-with-a-Multimeter-Step-10.jpg","bigUrl":"\/images\/thumb\/0\/0b\/Test-Continuity-with-a-Multimeter-Step-10.jpg\/aid11307865-v4-728px-Test-Continuity-with-a-Multimeter-Step-10.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

\u00a9 2021 wikiHow, Inc. All rights reserved. And one of the best ways to do this is to use a multimeter with an ohmmeter setting and then measuring the resistance values. Then, you need to set the multimeter to the correct factor of 10. Testing for a bad electronic control module (ECM), sometimes called an electronic control unit, requires the use of computer diagnostic equipment. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/9\/93\/Test-Continuity-with-a-Multimeter-Step-9.jpg\/v4-460px-Test-Continuity-with-a-Multimeter-Step-9.jpg","bigUrl":"\/images\/thumb\/9\/93\/Test-Continuity-with-a-Multimeter-Step-9.jpg\/aid11307865-v4-728px-Test-Continuity-with-a-Multimeter-Step-9.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

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\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/e\/ed\/Test-Continuity-with-a-Multimeter-Step-4.jpg\/v4-460px-Test-Continuity-with-a-Multimeter-Step-4.jpg","bigUrl":"\/images\/thumb\/e\/ed\/Test-Continuity-with-a-Multimeter-Step-4.jpg\/aid11307865-v4-728px-Test-Continuity-with-a-Multimeter-Step-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

\u00a9 2021 wikiHow, Inc. All rights reserved. If you’re testing an outlet, unscrew the faceplate and unscrew the outlet’s mounting screws. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\n<\/p><\/div>"}. It should read at least 12.6 volts with the engine off, or 13.7 volts with the engine running. When in doubt, consult your multimeter’s manual to figure out how to set it to continuity mode. MOSFETs are outstanding devices when it comes to amplifying or switching of various kinds of loads. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/8\/82\/Test-Continuity-with-a-Multimeter-Step-7.jpg\/v4-460px-Test-Continuity-with-a-Multimeter-Step-7.jpg","bigUrl":"\/images\/thumb\/8\/82\/Test-Continuity-with-a-Multimeter-Step-7.jpg\/aid11307865-v4-728px-Test-Continuity-with-a-Multimeter-Step-7.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

\u00a9 2021 wikiHow, Inc. All rights reserved. Plug the red probe into the VÎ© port. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. wikiHow's Content Management Team carefully monitors the work from our editorial staff to ensure that each article is backed by trusted research and meets our high quality standards. This matters more if you’re checking voltage, and there isn’t any special difference between the cords themselves though. Pull it out a little and put the black terminal on the metal screw on the side. Never test continuity on an active current. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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