![]() ![]() The safest and most effective way it to use a Wire Piercing Probe to get to the signal inside the wire. But I suggest you don't test those circuits this way, since the terminals could get damaged. The power and Ground circuits can be tested with the MAF sensor's connector disconnected from the sensor and testing the front of the connector. Below, you'll find out what each circuit does: In the photos that you'll be using through out the article, I have labeled the wires with the numbers 1 thru' 3. One feeds power, another Ground, and the last is the one that delivers the MAF signal, that the sensor creates, to the fuel injection computer. The mass air flow (MAF) sensor on your Nissan Maxima is a three wire sensor. Circuit Descriptions Of The Nissan MAF Sensor Connector You can see what this tool looks like here: Wire-Piercing Probe. One other tool I'm gonna' recommend is a wire-piercing probe to to test the MAF signal wire. You can use a digital multimeter or an analog multimeter, either one will do the job. To use the test info in this article, you'll only need to use a multimeter.
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