Request: throttle position sensor measurements

91Beater · Post by **91Beater** » Sat Mar 10, 2012 3:34 am

Ok, according to here:
http://www.surrealmirage.com/subaru/engine.html

2-3 should be 12kohm
2-4 3-5k WOT, 10-12k no throttle
1-2 shorted on idle

Could you check the value for 2-3, and 2-4 at WOT and no throttle?

Also, how far do you have to move the gas before 1-2 goes from short to open?

My TPS is mouted with two screws and the TPS itself has two oval holes and it can move about once the screws are loosened. Does yours have some means of attachment that prevents movement?

If it does move, how do I calibrate the proper position? Do I move the sensor around until I reach the specific ohm value at WOT, or do I do this at no throttle?

91Beater · Post by **91Beater** » Sat Mar 10, 2012 4:04 am

The position vs resistance relationship between that site and the FSM scan are opposite.

http://www.main.experiencetherave.com/s ... sting1.jpg

Which is right? The FSM's 1 to 4.3 doesn't seem right.

vrg3 · Post by **vrg3** » Sat Mar 10, 2012 5:08 am

The factory service manual scans are correct. If the Chilton's manual disagrees, disregard it and follow the FSM.

This scan should answer your question about adjustment and idle threshold:

http://www.main.experiencetherave.com/s ... sting3.jpg

Post by **Legacy777** » Mon Mar 12, 2012 6:19 pm

Yeah I would think the FSM should be correct. I believe the readings on my site may be from the Chiltons. I'd have to put a multimeter on the TPS to confirm though.

91Beater · Post by **91Beater** » Wed Mar 14, 2012 6:18 am

Legacy777 wrote:Yeah I would think the FSM should be correct. I believe the readings on my site may be from the Chiltons. I'd have to put a multimeter on the TPS to confirm though.

The FSM is wrong in that part. Chilton's is correct.

2-4 resistance gets smaller with throttle opening, not larger.

silver03 · Post by **silver03** » Wed Mar 14, 2012 3:11 pm

I never could get this figured out...ending up going to upull and grabbing a complete throttle body with sensor...which worked!

Post by **Legacy777** » Thu Mar 22, 2012 5:37 pm

91Beater wrote:
Legacy777 wrote:Yeah I would think the FSM should be correct. I believe the readings on my site may be from the Chiltons. I'd have to put a multimeter on the TPS to confirm though.
The FSM is wrong in that part. Chilton's is correct.

2-4 resistance gets smaller with throttle opening, not larger.

Ok, thanks for verifying.

Post by **Legacy777** » Thu Mar 22, 2012 5:38 pm

silver03 wrote:I never could get this figured out...ending up going to upull and grabbing a complete throttle body with sensor...which worked!

Well, glad the new TB worked though.

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Request: throttle position sensor measurements

Request: throttle position sensor measurements

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