How To Test a 2JZGE MAF

How To Test a 2JZGE MAF


The 2JZGE is an excellent platform for turbocharged performance, known as the NA-T. Most enthusiasts don’t know that the non turbo 2JZ is quite the capable performer for a number of reasons.

The 2JZGE is a very stout engine with many similarities to the 2JZGTE, from the crankshaft and rods and shortblock. It can handle boost and power almost as well as the 2JZGTE, and in stock form can put down power levels around 500-600hp.

Slight differences in the piston design as well as engine compression and cylinder head make the 2JZGE slightly different than the 2JZGTE. For more information on the NA-T setup, or turbocharging the 2JZGE and the differences between the 2JZGE and 2JZGTE, check our FAQ.



The 2JZGE is a plentiful motor that can be found in the Lexus SC300, GS300, IS300 and many more applications. The GE uses 330cc top-feed high impedance Denso style injectors and a Karman Vortex mass air flow (MAF) meter. This Karman MAF is often used for turbocharged setups when you are sticking with the stock 2JZGE ECU and piggyback tuning computer.

Today we’ll be looking at inspecting, testing and servicing the 2JZGE mass air flow sensor for any problems. The MAF is an array of sensors meant to read the real time values of the incoming air charge to the engine. When you are adding a turbo kit or another forced induction option, you need to make sure your MAF is operating at 100$ efficiency. The 2JZGE MAF is a good unit to around 500 whp, where you may encounter MAF overrun depending on your turbocharger setup and boost levels.

To begin our How To Test a 2JZGE MAF article, you’ll need to locate and unplug your 2JZGE MAF. The sensor is mounted to a flange that is connected to the intake snorkel which leads to your throttle body. Your MAF is connected by way of a 5 pin weatherproof connector with a protective shroud that covers the inbound wire pins.



Unplug your 2JZGE MAF and using a multimeter, put the black lead on your negative battery terminal. Now gently touch but do not probe the front of the plug for a switched power source at PIN 2 shown below.


Never probe or force your multimeter lead down the front of the wiring harness, you may cause damage to the metal pins inside. This damage can enlarge the pin holes so that your connector does not make a solid connection anymore. If you have power here at this wire, move onto the actual mass air flow meter to test it.

How to Test a 2JZGE MAF


Now take your multimeter and change it’s settings so that you can read the resistance between the pins on the mass air flow sensor. First inspect the 2JZGE MAF wiring diagram below for the two pins you’ll be measuring resistance between.


The two pins on the actual MAF you’ll be testing are THA and E2. There’s resistance values that you must test these two wires under to see if your mass air flow meter is functioning or not.

Depending on the temperature of the unit, you’ll be looking for specific ranges of resistance between pins THA and E2.

At ambient temperature or roughly 20ºC or 68º F, you’ll be looking for the resistance ranges of 2-3Ω.

At temperatures of 40ºC or 104ºF, the resistance ranges should be 0.9-1.3kΩ. If your mass air flow meter does not check out with the following resistance ranges, it has failed and must be replaced.

The Toyota part number for this unit is 22250-46010 or 22250-46020. You can also find this unit under the Lexus badge with part number 22250-46020 in the event your Toyota dealer does not have this part.

That does it for our How to Test a 2JZGE MAF, please let us know if you have any questions or comments below!