How To Test Your 2JZ Mass Airflow Sensor

This is another chapter to our “How-To” series involving the legendary 2jZGTE, an inline six twin turbocharged motor found in the Toyota Supra (1994-1998). While the 2JZ is not a USDM production motor, it is still in production from Toyota and parts are easily sourced and priced for this excellent swap candidate.

For those swapping in a JDM version of the 2JZ found in the Japanese Domestic Market Aristo, you will not be using this MAF procedure unless you have added a Mass Air Flow Sensor to your existing 2JZ engine swap. If you are sticking with that manifold absolute pressure setup, you ill not need to learn How To Test Your 2JZ Mass Airflow Sensor.

Differences from the JDM version of the 2JZ and the USDM 2JZ are very easy to spot out and very slight.

• The JDM 2JZGTE has a set of ceramic CT20 turbochargers versus the USDM CT12A.
• The JDM 2JZGTE employs 440cc high impedence injectors vs the USDM 550cc low impedence injectors
• The JDM 2JZGTE uses just a Manifold Absolute Pressure Sensor vs the USDM 2JZGTE that uses a MAF and MAP reference.
• The JDM 2JZGTE uses different water pump setups as well as no EGR port

Problems with your MAF Sensor can vary from inoperating components to sensor failure, in extreme cases can trigger P0102 OBDII code which means that there is a problem with the Mass Air Flow (MAF) sensor or circuit. Related OBDII codes are P0100, P0101, P0103, and P0104.

The Toyota 2JZGTE MAF Sensor part number is 22250-46030, Air Mass Meter and is located in your engine bay connected to your intake tract. Undo the clamps on either end of your MAF and unplug it from the 5 pin weatherproof connector.

To test your MAF sensor you will need an ohmmeter and test the 2 terminals, THA and E2 for resistance within a specific heat range. This is the easy part of our How To Test Your 2JZ Mass Airflow Sensor guide, so long as you understand what wires to check.

Operating Temps

• -20 °C – Resistance Range 10-20 kΩ
• 0 °C – Resistance Range 4-7 kΩ
• 20 °C – Resistance Range 2-3 kΩ
• 40 °C – Resistance Range 0.9-1.3 kΩ
• 60 °C – Resistance Range 0.4-0.7 kΩ

If your MAF sensor falls outside of these parameters when testing, you will most likely need a new MAF or replacement Air Mass Sensor.

To test the operation of your Mass Air Flow Sensor, plug your MAF back in and use the back of the plug to access the wires in question. You will be checking to make sure that your voltage is fluctuating when your MAF is plugged in.

With your MAF plugged in use your ohmmeter to test the connection through the backside of your MAF plug, you will be testing the VG and E21 pins.

Connect the positive tester to terminal VG, and negative (–) tester probe to terminal E21 and turn the ignition switch to the “ON” position.While having these 2 pins connected, have a friend blow through the front of the MAF sensor and check that the voltage is moving up and down.

If your MAF is not reacting to this test, it is dead and needs replacing immediately. There are 2 manufacturers that are OES ( Original Equipment Suppliers ) for Toyota in regards to the mass air flow sensor. Don’t forget that How To Test Your 2JZ Mass Airflow Sensor is not our only 2JZGTE article however.

When your 2JZ MAF does not respond with the right specifications, you will need a replacement mass air flow sensor.

Related Articles

• How To Wire Up Your 2JZ Swap
• How To Install a Super AFC in a 2JZ
• How To Test your 2JZ Camshaft Position Sensor
• How to Test your 2JZ Crankshaft position sensor

Happy Boosting!

• Pro Street Staff
• www.prostreetonline.com