89 nissan pickup ecu diagnostics how to#

The signal wire for your 2.4 liter Altima MAF leads back and terminal at PIN 47 of your KA24 ECU. If you donвЂ™t see any voltage reading, or you see spikes or dips where there shouldnвЂ™t be, thereвЂ™s one last section of our DIY guide.Д¬hecking your Nissan Altima MAF for continuity This test is designed to show you if your MAF is unresponsive, lazy or just plain failed.

Make sure voltage increases along with engine speed.

Depress throttle or manually open throttle blade to increase engine speed.

Measurements at idle should be around 0.45 вЂ“ 0.89.

Start engine and warm up to operating temperature.

This is how you will test the voltage being sent by your Nissan MAF. Reconnect your MAF harness and make sure the paper clip is making contact with your signal wire terminal. Take a paper clip and straighten it, insert into the BACK of your MAF connector, at the PIN C terminal. The signal wire on your Nissan Altima MAF is PIN C, and this test involves backpinning PIN C with the MAF harness connected.

89 nissan pickup ecu diagnostics how to#

Learning how to measure your Nissan AltimaвЂ™s MAF signal is very easy and simple to do. This ground is supplied by your Nissan Altima ECU, and if you have ground here, you know that your Altima MAF is receiving power. Now turn the key in the ignition to the вЂњOFFвЂќ position, and now youвЂ™ll be checking the PIN B for a low reference signal.

If you have power at this wire, move onto checking for the low reference ground signal. This wire should return voltage, if not make sure you have the key inserted into the ignition and turned to the вЂњONвЂќ position. Now probe PIN A, which is the first pin thatвЂ™s adjacent to the blank slot in your Nissan MAF. With the MAF connector unplugged, put the black lead of your multimeter to the negative post of your battery. The first part of ourВ how to test a Nissan Altima MAF test involves measuring the wiring harness for power and ground. Using a multimeter, youвЂ™ll be testing the three wires at this sensor to see what is causing your P0100. To begin ourВ how to test a Nissan Altima MAF to fix the P0100 OBDII DTC trouble code, you will need to locate and disconnect your MAF.

ThereвЂ™s also GMC part numbers that work for your Nissan Altima, they are If you are having a hard time locating a MAF replacement for your KA24DE, check the following interchange part numbers : This 2.4 liter KA24 engine is found in many late model Nissan vehicles, from the Xterra, 240SX and Nissan pickup trucks. The part number for this air flow sensor isВ 22680-70F00, and as expected thereвЂ™s quite a few interchange part numbers. These bolts screw onto the air filter housing, but you will not need to remove any of it to test your MAF. The Mass Air Flow Sensor (MAF) on your 2.4 liter KA24DE equipped Nissan Altima is mounted to the air box by four 10mm bolts.