Inspect your air snorkel for any leaks or cracks, that can also have an adverse effect on how your MAF sensor operates. The snorkel should lift up in one piece along with your MAF sensor. Now loosen the worm clamps on your intake snorkel that leads to your Nissan throttle body. Begin by loosening the 10mm bolts that hold the Maxima mass air flow meter to your airbox. Replacing your Maxima MAF Sensorīefore you can clear your Nissan Maxima check engine light, you’ll need to replace the air flow meter. The symptoms of a bad mass air flow sensor include low engine power, poor fuel economy. You’ll need a replacement Nissan air flow meter before you remove the bad one. If your Maxima MAF sensor does not respond in this manner, chances are it’s gone bad. Disconnect mass air flow sensor harness connector. The last step is to raise or increase RPM to 4,000 RPM at which point the MAF should increase between 1.6 – 2.0 volts of signal. Start engine and warm it up to normal operating temperature. Your Nissan air flow meter should be transmitting between 1.0 – 1.2 volts of signal. Now increase engine speed to 2,500 RPM and measure the signal. Once it’s warmed up this signal wire should transmit between 1.0 – 1.2 volts of power. Now start your 3.5 liter engine and allow it to warm up. With the ignition switch ON you should have between 0.4 – 0.6 volts of Maxima MAF signal. Nissan's mass airflow sensor sends a voltage to the powertrain control module (PCM). Allow the MAF sensor to dry and reinstall. Spray 8 to 12 spurts of MAF sensor cleaner on the exposed plate. Remove the two screws that hold the MAF sensor secure and remove the MAF sensor.
Unplug the mass airflow sensor electrical connector. Leave your ignition turned to the “ON” position, but do not start your engine yet. Locate the MAF sensor next to the engine air filter housing. Keep your hands and tools clear of your engine bay and your cooling fans. Now with the MAF reconnected, pierce WIRE 3 using the diagram to the left. To test this part of our DIY tutorial, you’ll need to reconnect the mass air flow sensor. The signal wire is located on PIN 4 in the diagram above, or WIRE 3 of the Maxima MAF schematic below. Now if you have power and ground at your karman style air flow meter, the next order of business is to measure the Maxima MAF signal. This low reference signal is sent by your ECU, so if there’s no ground here you will need to check for continuity between PIN 3 and ECU terminal 67 of your Nissan computer. There should be a ground signal present at this wire, and if you don’t then this is a big problem. If you have power here the next wire to check is PIN 3 of our Maxima MAF wiring diagram. With the red lead of your multimeter at PIN 2 on the ENGINE side of the harness, you should have a switched power signal. Now gently probe the female side of the ENGINE harness at PIN 2 using the wiring diagram below. Testing for power at this MAF connector is easy to do once you turn the ignition to the “ON” position.
Once you’ve found this unit, depress the wiring connector tab and disconnect it. It’s bolted to your air box by four 10mm bolts. The first order of business is to open your Nissan hood and locate your air flow meter. To do this however you will need a digital multimeter to test the circuits and wires at each terminal.
2012 NISSAN MAXIMA MASS AIR FLOW SENSOR PROBLEMS HOW TO
If you have any of these symptoms you are best served by using this How To guide to test your Maxima air flow meter. Here’s a few of the common Maxima issues below Because the majority of these issues center around the air fuel mixture in your combustion chamber, these can be hard to track down. Common Nissan issues from a bad Maxima MAF Sensorįailed mass air flow meters can cause Maxima problems that are commonly misdiagnosed.
Some of the more common Maxima issues also stem around engine idle and the air fuel ratio of your 3.5 liter engine. Today I’ll be showing you how to test a mass air flow meter in a 2008 Maxima with a 3.5 liter Nissan engine in it.īecause your Maxima MAF sensor uses an integrated intake air temperature sensor, some of the Nissan Maxima symptoms can be hard to diagnose. When the VQ35 MAF sensor starts going bad, you’re Maxima will suffer from poor idle characteristics and run poorly. If your mass air flow meter encounters issues or becomes fouled, you’ll see just how important this sensor is. Your 3.5 liter Nissan engine uses this information to deliver the right fuel adjustments. The Maxima MAF sensor then converts these readings into voltage readings that your Nissan computer can use. It’s mounted there to read the incoming air charge to your VQ35 engine, and read information about the air. The MAF is also known as the mass air flow meter, and it’s mounted inline of your intake tract. Popping sound when accelerating.The Maxima MAF Sensor in your 3.5 liter engine is a big part of your Nissan EFI system.
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