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Old 05-17-2014, 10:18 PM   #1
supersmashbrothers
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Default 2001 rs / 04 STI swap P2109 (dbw curse)

Hey everyone. So long story short here I am once again at the mercy of the collective awesomeness of Subaru genius that is Nasioc lol . I know I said long story short so ill cut to the chase.

Car: 2001 rs
Swap: 2004 sti engine
Wiring merge: completed by Iwire (thanks)
Code: p2109 throttle / pedal position sensor (ugh :/

Diagnoses I've already performed:
1. Tested throttle body full open and full close - PASS
2. Tested for 2 keyed hot at solenoid - PASS
3. Tested Solenoid (bought new) -PASS lol


Questions:

1. How do I test the actual throttle body sensor (with out the Subaru select monitor ) ?
2. How do I test the pedal?
3. What is a Subaru select monitor


HELP PLEASE.
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Old 05-17-2014, 11:43 PM   #2
Paidfor
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You can view the tps v and % with any global obd2 scanner for your diag.... The Subaru select monitor is the dealer protocol scanner bs..

Or just disable the light wigh opensource.

Does it run funky or anything or it just has the CEL on?
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Old 05-18-2014, 09:39 AM   #3
DHRDAN
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I have done this exact swap twice now.



1. What curse are you talking about?



2. Get an laptop+open source software+tactrix cable(there are other brands for cheaper)


Then you can just drive the car and get all the ECU readings you want. It will tell you all the throttle info you want. Hell if you were in socal i would let you borrow mine. I'm not using it.



If you're getting the code, but your car is running fine, you need to double check that the wiring is good, that means checking the DBW relay, making sure your grounds are good..etc. If it were me, i would really look at the relay and how you're grounded.








Edit: From what i remember, and i'm too lazy to look it up again, get the STI wiring diagram, there are ways of calibrating the DBW sensor to change. Meaning you can make it sensative or change the way fuel is given to the engine depending on how hard you press the pedal.
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Old 05-18-2014, 02:13 PM   #4
supersmashbrothers
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I just wanna say thank you for the replys. you guys are awesome

The curse was a reference to the amount of DBW problems I've found as I was sifting through the mass information on the net. Plus I'm just not a big fan of my throttle being controlled by a sensor, rather then a cable. I guess this stems from the lag I encountered with the LS2. I understand that it is tunable but i'm not yet at a point where I want to dig into that.


1. The car is currently in limp mode and wont rev past 2k. Can I still perform your (#2) while in limp mode or....?
2. While the car is in limp mode will the obd2 scanner still tell me what I need to know and what exactly (numbers) am I looking for
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Old 05-18-2014, 04:35 PM   #5
supersmashbrothers
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Ok so we got the tantrix port all hooked up and logged. Cant figure out how to post them on here but I can email them asap. help
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Old 05-18-2014, 05:31 PM   #6
supersmashbrothers
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Anyone....
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Old 05-18-2014, 05:32 PM   #7
sidewayz
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Did you install a throttle stop under the pedal?
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Old 05-18-2014, 05:51 PM   #8
supersmashbrothers
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I installed the factory 04 sti pedal and fab'd up the pedal adapter but that's it. your joking?
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Old 05-20-2014, 12:00 AM   #9
supersmashbrothers
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...bump?
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Old 05-20-2014, 10:00 PM   #10
supersmashbrothers
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help
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Old 05-20-2014, 10:36 PM   #11
lodown1
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http://www.subaruforester.org/vbulle...ponding-90684/

found this after 2 min google search might be the solution to your issues
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Old 05-22-2014, 09:02 PM   #12
supersmashbrothers
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Thanks lodown1 but I tried that before I posted. Wow "2 min" of searching lol
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Old 05-23-2014, 10:17 AM   #13
Paidfor
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^^ I would never spend that much time researching google lol

2mins=eternity haha
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Old 05-25-2014, 12:26 PM   #14
supersmashbrothers
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+1 lol
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Old 05-27-2014, 08:22 PM   #15
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Damn cant catch a break can I?
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Old 05-28-2014, 11:25 PM   #16
supersmashbrothers
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Ok so today we hooked up the Tantrix.

Throttle opening angle (%)
min: 14.12
max: 100.00

Main throttle sensor (v)
min:0.84
max: 5.00

Throttle motor voltage (v)
min.oo
max:2.80

Throttle motor duty (%)
min:0.00
max:0.00

Target throttle plate position (%)
min:0.00
max:100.00

Sub throttle sensor (v)
min:1.70
max:5.00

Sub accelerator sensor (v)
min:1.14
max: 4.98

throttle plate opening angle(4 byte)
min:7.14
max:0.00 (111.98) <------Only read this reading When TB was manually opened by hand to show that we were getting a reading from the sensor, Just no movement under pedal control.

What we have interpreted from this

A. pedal is working 100%
B. ecu is reading data from pedal correctly
C. Ecu indicates correct output for TB
D. When key is initially turned on throttle body "twitches" but only intermittently/ randomly. When this "twitching" occurs The VOLTMETER reads .59(v). After a quick Continuity check our Assumption is that the wiring is good.
E. Disassembled the throttle body assuming my problem was internal. All gears spin freely with no unnessesery force. While still disassembled, We Plugged the throttle body in and watched the motor quickly spin "Twitching lol".


I am fully aware this post is filled with assumptions, but at this point that's all I currently have. If somebody wants to be awesome and help me with their wisdom...I'D LOVE THEM LONG TIME lol

PLEASE ANYONE???
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Old 05-30-2014, 04:01 PM   #17
xxst1tch3sxx
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At this point I'd say try talking to a local tuner who has experience doing a swap/swaps just to get their .02.
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Old 05-30-2014, 04:51 PM   #18
Paidfor
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Tune it for a cable driven throttle lol



Other than that.....i dont know bro
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Old 05-31-2014, 12:04 AM   #19
lodown1
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This is the info on the P2109 code from the factory service manual, The pdf files for the P2101 is about 4 pages long of diagnostics. I can email you the files


EE DTC P2109 THROTTLE/PEDAL POSITION SENSOR “A” MINIMUM STOP PERFORMANCE
NOTE:
For the diagnostic procedure, refer to DTC P2101. <Ref. to EN(H6DO)(diag)-324, DTC P2101 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT RANGE/PERFORMANCE, Diagnostic Procedure with Diagnos- tic Trouble Code (DTC).>
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Old 06-02-2014, 11:37 PM   #20
supersmashbrothers
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Yes that would be awesome
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Old 06-02-2014, 11:38 PM   #21
supersmashbrothers
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lol we have 5,500 pop in Sonora. I think we are the local tuners ha ha
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Old 06-04-2014, 07:26 AM   #22
xxst1tch3sxx
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Quote:
Originally Posted by supersmashbrothers View Post
lol we have 5,500 pop in Sonora. I think we are the local tuners ha ha
Haha didn't realize where you were. Good luck! ><
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Old 06-04-2014, 11:48 PM   #23
supersmashbrothers
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Quote:
Originally Posted by xxst1tch3sxx View Post
Haha didn't realize where you were. Good luck! ><
Just purchased a new pedal via ebay. Also buying a throttle body tomorrow via the fs threads. $110.00 out the door for both aint half bad and deff worth the try. Super sick of this car, Anyone want a RSTI lol?
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Old 06-12-2014, 12:37 AM   #24
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Ok so pedal came in and no luck with a fix (((((
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Old 06-21-2014, 05:14 PM   #25
supersmashbrothers
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Replaced the throttle body and she's GOOD!!!!!!!!!! F@$# yeah ))


On a side note: How hot is the dbw relay supposed to run? mine is pretty hot to the touch, like really hot...Just wondering if this is normal operating temp for the relay. gonna hit it with a thermal gun tomorrow and ill post up the results.
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