helpful Sc300 TPS adjust article
01-10-15, 10:48 PM
#1
helpful Sc300 TPS adjust article
I needed to adjust my TPS due to check engine light 41 but I couldn't find much info for the sc300 (2JZGE), found a lot of specs out there for SC400, LS400 Supra etc. They are all adjusting the same way but I wanted the specs. Anyway, I found the following article very helpful.
I found my TPS IDL-E2 was open when closed, therefore it didn't know when to go idle and would get close to stalling out when coming to a stop (along with CE light).
Toyota wants it to go from no resistance -> to a bit of resistance-> to a lot of resistance -> and then open all within 1 millimeter, so it's seems pretty important to get it just right. If my tuning experience is correct, it probably adjust throttle tip in fuel on and off. This would result in smooth throttle transition and reduce bucking. After proper adjustment, it did seem to drive smoother. I never did check mine when I got the car, now the sensor is probably old now and got out of adjustment a little. It is possible my TPS is dying soon, but at $150, I gave it an adjust and now found all the values are in spec.
Here is the article:
http://my.prostreetonline.com/2014/0...e-a-2jzge-tps/
Here are my personal notes and comments:
1) use alligator clips to clip IDL and E2, they do actually work and save hunting for a pigtail, otherwise impossible turn the sensor.
2) meter just deflects.. (meaning analog needle) this was a bit confusing. But I turned mine clockwise so that resistance went from 1 ohm to 200 ohm. When a .50mm feeler gauge is used.
This resulted in 1 ohm with no feeler gauge, 200 ohm with the .50mm gauge, and open with .65mm gauge, according to a Russian Lexus document, the SC300 uses tighter values than the SC400, so it seems very close to perfect here.
3) At wide open throttle (WOT) the reading between the two terminals IDL-E2 will result in a resistance value of 0.5 kΩ or less. The throttle blade at full closed will net a value of 0.34-6.3kΩ between VTA and E2 TPS pins. I think they mean at CLOSED IDL-E2 should be 0.5k or less. probably a typo. My IDL-E2 stays open as soon as the throttle cracks open a little, and WOT didn't change it. But VTA-E2 at WOT I got 3.7k on mine.
4) the correct place for feeler gauge is the one they show, not the easy one that is on top of the reel, it doesn't work. You have to put the feeler gauge under, verify it is working by dragging the feeler out, you should feel the clamp force.
** if you get the check engine light 41 it is possible that turning the TPS counter clockwise (causing IDL-E2 conductivity) would let the idle signal back again, to clear the CE light condition, but do adjust it soon when you get a chance and probably good to avoid WOT. But you do need to remove the cam gear cover with 6x 5mm allen head bolt to get to the TPS screws. If you are stuck on the street, this is a common hex size that a serious cyclist carries, ask to borrow one if you need
here are my values after testing
WOT
VTA-E2 3.7k
IDL-E2 Open
Close
VTA-E2 757 ohms
IDL-E2 2 ohms
Hope this helps..
Here is a paste of the article for future
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.
how-to-test-2jzge-tps4
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.
how-to-test-2jzge-tps5
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.
how-to-test-2jzge-tps
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
how-to-test-2jzge-tps2
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.
how-to-test-2jzge-tps6
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.
how-to-test-2jzge-tps7
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.
how-to-test-2jzge-tps9
Check the back of your TPS for any damage to the sensor or pins before installing and calibrating your new TPS sensor.
how-to-test-2jzge-tps8
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.
how-to-test-2jzge-tps1
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.
how-to-test-2jzge-tps15
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.
how-to-test-2jzge-tps2
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 0.5 kΩ or less. The throttle blade at full closed will net a value of 0.34-6.3kΩ 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!
I found my TPS IDL-E2 was open when closed, therefore it didn't know when to go idle and would get close to stalling out when coming to a stop (along with CE light).
Toyota wants it to go from no resistance -> to a bit of resistance-> to a lot of resistance -> and then open all within 1 millimeter, so it's seems pretty important to get it just right. If my tuning experience is correct, it probably adjust throttle tip in fuel on and off. This would result in smooth throttle transition and reduce bucking. After proper adjustment, it did seem to drive smoother. I never did check mine when I got the car, now the sensor is probably old now and got out of adjustment a little. It is possible my TPS is dying soon, but at $150, I gave it an adjust and now found all the values are in spec.
Here is the article:
http://my.prostreetonline.com/2014/0...e-a-2jzge-tps/
Here are my personal notes and comments:
1) use alligator clips to clip IDL and E2, they do actually work and save hunting for a pigtail, otherwise impossible turn the sensor.
2) meter just deflects.. (meaning analog needle) this was a bit confusing. But I turned mine clockwise so that resistance went from 1 ohm to 200 ohm. When a .50mm feeler gauge is used.
This resulted in 1 ohm with no feeler gauge, 200 ohm with the .50mm gauge, and open with .65mm gauge, according to a Russian Lexus document, the SC300 uses tighter values than the SC400, so it seems very close to perfect here.
3) At wide open throttle (WOT) the reading between the two terminals IDL-E2 will result in a resistance value of 0.5 kΩ or less. The throttle blade at full closed will net a value of 0.34-6.3kΩ between VTA and E2 TPS pins. I think they mean at CLOSED IDL-E2 should be 0.5k or less. probably a typo. My IDL-E2 stays open as soon as the throttle cracks open a little, and WOT didn't change it. But VTA-E2 at WOT I got 3.7k on mine.
4) the correct place for feeler gauge is the one they show, not the easy one that is on top of the reel, it doesn't work. You have to put the feeler gauge under, verify it is working by dragging the feeler out, you should feel the clamp force.
** if you get the check engine light 41 it is possible that turning the TPS counter clockwise (causing IDL-E2 conductivity) would let the idle signal back again, to clear the CE light condition, but do adjust it soon when you get a chance and probably good to avoid WOT. But you do need to remove the cam gear cover with 6x 5mm allen head bolt to get to the TPS screws. If you are stuck on the street, this is a common hex size that a serious cyclist carries, ask to borrow one if you need
here are my values after testing
WOT
VTA-E2 3.7k
IDL-E2 Open
Close
VTA-E2 757 ohms
IDL-E2 2 ohms
Hope this helps..
Here is a paste of the article for future
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.
how-to-test-2jzge-tps4
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.
how-to-test-2jzge-tps5
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.
how-to-test-2jzge-tps
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
how-to-test-2jzge-tps2
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.
how-to-test-2jzge-tps6
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.
how-to-test-2jzge-tps7
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.
how-to-test-2jzge-tps9
Check the back of your TPS for any damage to the sensor or pins before installing and calibrating your new TPS sensor.
how-to-test-2jzge-tps8
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.
how-to-test-2jzge-tps1
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.
how-to-test-2jzge-tps15
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.
how-to-test-2jzge-tps2
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 0.5 kΩ or less. The throttle blade at full closed will net a value of 0.34-6.3kΩ 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!
Last edited by SC3coupe; 01-11-15 at 09:16 AM.
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