How to Service a 2JZGE TPS

How to Service a 2JZGE TPS

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The non turbo version of the legendary 2JZGE is found in many vehicles, from the Lexus SC and GS300’s and of course the non turbo Toyota Supra. While this engine is not as stout as the 2JZGTE, the non turbo 2JZ is more than capable of putting down over 500whp with a stock bottom end.

As part of our continuing coverage on the non turbo 2JZGE engine, today we’ll be showing you how to service a 2JZGE TPS as well as the throttle body and idle dashpot. This is great when you need to service your throttle body, your throttle position sensor (TPS) or if you are installing a front facing intake manifold (FFIM).

Let’s take a look at the throttle body assembly in your 2JZGE, which should be part of the crossover intake manifold.

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We’ll begin with the basics on How to Service a 2JZGE Throttle Body, by adjusting and checking all the proper throttle bumpstops. Make sure that the throttle blade operates properly and that your bumpstops are calibrated for full closed and full open operation.

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Next let’s move onto the throttle position sensor and throttle position sensor wiring pinout. This sensor is connected by way of a four pin weatherproof connector, and has a part number of 89452-33010.

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We’ll begin the testing process by checking the 2JZ TPS sensor for functionality first. Take your multimeter and you’ll be testing the resistance between the terminals shown in the diagram below

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The first pin or terminal pair we will be testing is VTA–E2 which should show you a resistance value of 0.34–6.3 kΩ. If you do not see this value between these two pins, make sure that there is zero clearance between the backstop of the throttle blade and the throttle bump stop.

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Next check the throttle position sensor pin pair of IDL–E2, which should result in a resistance value of 0.5 kΩ or less. Now swing the throttle blade all the way open until the throttle will not open any further and is resting against the wide open throttle (WOT) bumpstop.

Measure the resistance between VTA–E2 now while making sure that the throttle position sensor is fully opened. You should see a resistance value between 2.4–11.2 kΩ. If you do not see this full range of resistance values, the throttle position sensor (TPS) is bad and must be replaced.

How to Replace a 2JZGE TPS


 

Removing the TPS from your throttle body is very easy and straightforward, simply unplug the connector and unscrew the two bolts that secure the TPS in place.

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When you are removing the TPS make sure to keep the area clear and free of any debris that may fall into the throttle body assembly. Inspect the throttle body assembly to make sure that the throttle blade opens and closes smoothly.

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Check the back of your TPS for any damage to the sensor or pins before installing and calibrating your new TPS sensor.

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How To Calibrate your 2JZGE TPS


 

The last part of our How to Service a 2JZGE TPS Guide, we’ll be installing a replacement Toyota TPS sensor for our 2JZGE. This TPS can also be found under the following part numbers of 89452-12050, 89452-06010, 89452-22090 and 89452-33010. In the event your Toyota dealer does not have this part in stock, you can alternate it with GM part numbers 213446 or 213930.

 

 

 

 

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Mount your replacement TPS sensor back onto your throttle body, and make sure that your throttle blade can move freely. Do not force or otherwise try and muscle the blade open if it doesn’t want to move. You may have installed or placed the replacement TPS too far advanced or retarded, and it’s not making correct contact with the throttle body blade.

Once you’ve got the new TPS properly seated, snug down on the two screws that secure the sensor and then back them off slightly so you can still turn the TPS freely.

Put a .50mm or 0.020 inch feeler between the throttle stop bump stop and the throttle blade lever located on the throttle body.

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Try to have this feeler gauge jammed in there or have a friend help you out by holding the feeler gauge in place. You need this feeler there to maintain this gap as you turn and calibrate your TPS for operation.

Now with your multimeter handy, connect the probe leads to IDL and E2 of the throttle position sensor. With these two leads connected, slowly turn the TPS clockwise until your multimeter deflects.

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You’re aiming for the same resistance values shown in the section above, and you are looking for two separate values when it comes to installing your new 2JZGE throttle position sensor.

At wide open throttle (WOT) the reading between the two terminals IDL-E2 will result in a resistance value of 3.7k kΩ or less. With the throttle closed the reading between the pins should be 0.5k or less. The throttle blade at full open will net a value of 3.7 between VTA and E2 TPS pins.

Once you have the 2JZ TPS calibrated, you are now ready to rock and roll!

That does it for our How to Service a 2JZGE TPS Guide, have any questions or comments leave them below!

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