How To Service your 2JZ TPS

How To Service your 2JZ TPS

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You finally got your 2JZGTE or 1JZ engine swap into your car and the moment of truth is upon you. You try to crank over the motor only to find that either your TPS is crammed open or like many engine swaps, the TPS sensor is mangled. Because these JDM engines are transported, stored and generally hauled around with not much care, the throttle position sensor is one of the most common damaged components.

Today we’ll be showing you how to test and service your 2JZ throttle position sensor (TPS) and test the 4 wire weatherproof engine connector.

If you are having problems with your 2JZ TPS or have found that your TPS is sending a 100% open position to your 2JZ ECU, this How To Service your 2JZ TPS article is for you.

To begin we’ll be taking a look at the TPS located on your 2JZGTE or 1JZ engine. The throttle position sensor in question is part number 89452-22080, but can be found under 89452-12080 as well.

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Mounted to your intake manifold this stock TPS should not be confused with your additional Traction Control throttle body. This four pin connected throttle position sensor is easy to test, but will require you to backpin the connector to measure resistance.

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Take a second to familiarize yourself with the four pin TPS connector. You will be testing ranges between these four pins to see if your throttle position sensor is good or not.

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Because this test requires you to have the TPS connected, you will need to do that now and backpin or test the back of the connector’s wires.

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With the TPS connected, you will be using a voltmeter to measure the active resistance of your TPS with the key set to the “ON” position and engine off.

Using your voltmeter or multimeter, take the leads and measure resistance between PIN 1 and PIN 4 of the throttle position sensor. With the throttle plate closed you should see a value of approximately 4-9 KΩ.

If you have this resistance value between PIN 1 and PIN 4, next you will be opening up the throttle plate to 100% wide open throttle.

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With the throttle cranked all the way open, now measure the resistance between PIN 1 and PIN 3. With the throttle plate all the way open you should see values between 3.3 and 10 KΩ.

If you see this value with the throttle plate open, it’s now time to adjust the throttle stop screw to dial in the throttle position sensor and check it’s position.

Using a hex wrench, adjust the throttle stop on the TOP screw first to close the gap between your throttle butterfly in the closed position. With no gap or space in the throttle stop, measure the resistance between PIN 1 and PIN 3.

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With no gap between the throttle blade stop and the throttle blade, you should see a resistance value between 0.2 and 0.8 KΩ.

The last positional test of your 2JZ throttle position sensor is to take a feeler gauge and widen the gap between the throttle blade stop and the throttle blade to 0.45mm.

With the throttle blade closed and the bump stop adjusted to 0.45mm, measure the resistance between PIN 1 and PIN 2, you should see 0 – 2.3 KΩ with the correct clearance.

If your throttle position sensor checks out okay, chances are you have a wiring issue with your swap. Check your wires at the ECU or PCM using our 2JZ ECU pinout to continue your troubleshooting.

This concludes our How To Service your 2JZ TPS walkthrough, please let us know if you have any questions or comments below!

Added by request from user Dave – 

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1 COMMENT

  1. I tried this and I show a reading of 0 for pin 1 and 3 and a reading of 1.8 for pin 1 and 4. TPS sensor is brand new. Readings will not change with the TPS adjusted. Could it be a bad ECU?

    • Hi Dave, sounds like you may have the pin arrangement backwards? Do you see any fluctuation at the VTA wire on your TPS?

      VTA is signal, E2 is ground, VC is +5, and IDL is +12 to ECT at WOT for autos. You are backpinning your TPS with the sensor and harness connected right? If you have zero movement at the VTA pin, your TPS is dead or something else is wrong with your throttle body.

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