# Abarth 500 - DBW calibration **URL:** \ **Category:** V3 SOFTWARE\ **Created:** [September 12, 2024, 7:45pm UTC](https://community.ecumaster.com/t/abarth-500-dbw-calibration/2289 "2024-09-12T19:45:19Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![maximejanuario](https://avatars.discourse-cdn.com/v4/letter/m/58956e/32.png) [@maximejanuario](https://community.ecumaster.com/u/maximejanuario)\ **Post date:** [September 12, 2024, 7:45pm UTC](https://community.ecumaster.com/t/abarth-500-dbw-calibration/2289/1 "2024-09-12T19:45:19Z")
Hi, 🙂 I’m running 3,035 firmware version and I have “the throttle doesn’t return to limp home position” message during calibration. First : - car is running fine with V2 (I tried V2 retrofit and it’s ok) → wiring ok - when I press the pedal (0-100%) PPS voltage is 0,75-4.4V → PPS configuration looks good - when I press the pedal (0-100%) TPS voltage is allways 0.75V and physically the throttle doesn’t move → the pedal and the throttle seems to be not “connected” together - when I override DC (0-100%) the TPS voltage 0,75-4,7V → DBW configuration looks good - I tried without check signal input for TPS and PPS but no effect. I think I’m missing big thing but what 
 ? The car is an EU5 Abarth 500 with 0280750073 Alfa Romeo throttle. Please someone got some ideas ? Thanks a lot ! ---
**Author:** ![Werwolf25565](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/werwolf25565/32/611_2.png) [@Werwolf25565](https://community.ecumaster.com/u/Werwolf25565)\ **Post date:** [September 12, 2024, 8:18pm UTC](https://community.ecumaster.com/t/abarth-500-dbw-calibration/2289/2 "2024-09-12T20:18:24Z")
Sorry to post this again. But maybe this guide can help? Read messages before and after as well please. > [@1,8t AGU DBW setup problem](https://community.ecumaster.com/t/1-8t-agu-dbw-setup-problem/1185/36): > > Bosch 0 280 750 009: Ok. To get this thread closed I will post the summary, that was found with help of the different people above. Thank you very much. grinningStep 1: Get PPS (Pedal Position Sensor) Set up: Get these Windows and press and release Pedal to check the Analog Inputs. → If Voltages do not move as expected, you most probably have them connected the wrong way around. (So swap + and - at Pedal or somewhere. This was more Important in V2) Put your PPS 1 with respec
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**Author:** ![maximejanuario](https://avatars.discourse-cdn.com/v4/letter/m/58956e/32.png) [@maximejanuario](https://community.ecumaster.com/u/maximejanuario)\ **Post date:** [September 13, 2024, 6:34am UTC](https://community.ecumaster.com/t/abarth-500-dbw-calibration/2289/3 "2024-09-13T06:34:19Z")
Hi, Yes your post helps me a lot before my post (thanks a lot !) but didn’t solve my problem, so I’m here today 🙂 At first, the throttle don’t move if I press pedal in V3, ain seems frozen. In V2, the throttle move and ain are alive. I don’t beleve in wiring issue (I tried back in V2 for test and it’s ok). If I forced the DC, the throttle move and ain too. I think this problem make my throttle calibration fail with error message. ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [September 13, 2024, 10:15am UTC](https://community.ecumaster.com/t/abarth-500-dbw-calibration/2289/4 "2024-09-13T10:15:57Z")
> [@maximejanuario](#): > > I think this problem make my throttle calibration fail with error message. Please make a throttle calibration until it fails. Then send a screen from calibration, log and your base map ---
**Author:** ![maximejanuario](https://avatars.discourse-cdn.com/v4/letter/m/58956e/32.png) [@maximejanuario](https://community.ecumaster.com/u/maximejanuario)\ **Post date:** [September 13, 2024, 3:35pm UTC](https://community.ecumaster.com/t/abarth-500-dbw-calibration/2289/5 "2024-09-13T15:35:57Z")
Hi Jadzwin, This is my DBW calibration window : ![image](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/0/0d4ecf0731e5330141db1a2f1372c09b7654a5c9.jpeg) I can now control my throttle with my pedal : I needed to “calibrate” Spring DC rĂ©fĂ©rence. But it don’t change the DBW calibration. In V2, the Spring DC rĂ©fĂ©rence can be set to 100% (that I needed), in V3 it’s only max 50%. Am I on the right way ? ---
**Author:** ![Greg](https://avatars.discourse-cdn.com/v4/letter/g/71c47a/32.png) [@Greg](https://community.ecumaster.com/u/Greg)\ **Post date:** [September 13, 2024, 3:44pm UTC](https://community.ecumaster.com/t/abarth-500-dbw-calibration/2289/6 "2024-09-13T15:44:57Z")
that’s throttle itself problem i think i had this laterally week ago when throttle was installed on custom made flange and wasn’t flat, was twisting throttle body - it is hard to believe it . once throttle unbolted form manifold was calibrating perfectly fine so try to remove throttle form intake and try to calibrate it again check if is working ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [September 13, 2024, 3:48pm UTC](https://community.ecumaster.com/t/abarth-500-dbw-calibration/2289/7 "2024-09-13T15:48:56Z")
what frimware do you use ? ---
**Author:** ![maximejanuario](https://avatars.discourse-cdn.com/v4/letter/m/58956e/32.png) [@maximejanuario](https://community.ecumaster.com/u/maximejanuario)\ **Post date:** [September 13, 2024, 3:56pm UTC](https://community.ecumaster.com/t/abarth-500-dbw-calibration/2289/8 "2024-09-13T15:56:47Z")
I use the 3.035 version ---
**Author:** ![maximejanuario](https://avatars.discourse-cdn.com/v4/letter/m/58956e/32.png) [@maximejanuario](https://community.ecumaster.com/u/maximejanuario)\ **Post date:** [September 13, 2024, 3:58pm UTC](https://community.ecumaster.com/t/abarth-500-dbw-calibration/2289/9 "2024-09-13T15:58:29Z")
Interresting ! I’ll try it ---
**Author:** ![maximejanuario](https://avatars.discourse-cdn.com/v4/letter/m/58956e/32.png) [@maximejanuario](https://community.ecumaster.com/u/maximejanuario)\ **Post date:** [September 13, 2024, 4:46pm UTC](https://community.ecumaster.com/t/abarth-500-dbw-calibration/2289/10 "2024-09-13T16:46:40Z")
Same with throttle off to the plenum. - I tried with oem throttle ( 0280750137) and V3 firmware → calibration ok 🙂 - I put back the alfa Romeo throttle and V3 firmware–\> calibration fail - I retrofit to V2 version and with alfa Romeo throttle → calibration ok So it may be an incompatibility between the alfa throttle 0280750073 and V3 firmware ? ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [September 13, 2024, 5:57pm UTC](https://community.ecumaster.com/t/abarth-500-dbw-calibration/2289/11 "2024-09-13T17:57:22Z")
could you please send a log when you calibrate thr alfa dbw ? and the screen from wizard and your configuration? Ibqould like to analyze data and ecentually fix the autocalibration tool. ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [September 13, 2024, 10:05pm UTC](https://community.ecumaster.com/t/abarth-500-dbw-calibration/2289/12 "2024-09-13T22:05:16Z")
If you close the throttle with your finger (unpowered), how fast it opent to limp position ? How strong is the spring that opens the throttle to limp position ? It look like it doesn’t want to return to Limp home position with the DC 0% (no power to the throttle). If it returns slowly that could be the reason the autotune fails. ---
**Author:** ![maximejanuario](https://avatars.discourse-cdn.com/v4/letter/m/58956e/32.png) [@maximejanuario](https://community.ecumaster.com/u/maximejanuario)\ **Post date:** [September 15, 2024, 2:31pm UTC](https://community.ecumaster.com/t/abarth-500-dbw-calibration/2289/13 "2024-09-15T14:31:02Z")
Hi Jadzwin, Here my engine calibration file, a failed DBW calibration and the screen from this failed calibration [DBW calibration fail.csv](https://community.ecumaster.com/uploads/short-url/qceZFawblGXwS43n2b4tOrujHPx.csv) (172.4 KB) ![DBW calibration fail](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/8/82228ea96650f78a8026b9ebc0987c9211ecdae9.png) [20240915\_1623\_01.emub3](https://community.ecumaster.com/uploads/short-url/vH5gtk9omGQRKbLvSY3au8NSIND.emub3) (60.9 KB) ---
**Author:** ![maximejanuario](https://avatars.discourse-cdn.com/v4/letter/m/58956e/32.png) [@maximejanuario](https://community.ecumaster.com/u/maximejanuario)\ **Post date:** [September 15, 2024, 2:37pm UTC](https://community.ecumaster.com/t/abarth-500-dbw-calibration/2289/14 "2024-09-15T14:37:49Z")
hard to say but quit similar to OEM throttle, I try this test with my finger on a Citroen C2 VTS that I got for comparaison and it’s quit similar to the alfa one too. The spring looks good ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [September 15, 2024, 4:31pm UTC](https://community.ecumaster.com/t/abarth-500-dbw-calibration/2289/15 "2024-09-15T16:31:08Z")
do you have a log in emub3log formay ? csv is not usable for me. I just want to make sure my idea how to improve autocalibration will solve your issue. ---
**Author:** ![maximejanuario](https://avatars.discourse-cdn.com/v4/letter/m/58956e/32.png) [@maximejanuario](https://community.ecumaster.com/u/maximejanuario)\ **Post date:** [September 16, 2024, 5:28pm UTC](https://community.ecumaster.com/t/abarth-500-dbw-calibration/2289/17 "2024-09-16T17:28:35Z")
hi, Sorry for the CSV file, please found emub3logb file from a new DBW calibration : [DBW\_calibration\_fail.emublog3](https://community.ecumaster.com/uploads/short-url/j7jHJCg8cD2nLUOk4lFCjc8edTm.emublog3) (39.6 KB) ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [September 17, 2024, 2:50pm UTC](https://community.ecumaster.com/t/abarth-500-dbw-calibration/2289/18 "2024-09-17T14:50:03Z")
Thank you. I need to analyze it, as the log looks very weird to me. ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [September 17, 2024, 10:12pm UTC](https://community.ecumaster.com/t/abarth-500-dbw-calibration/2289/19 "2024-09-17T22:12:08Z")
Tommorow there will be new version 3.036. I think the calibration issue of your throttle is solved ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [September 18, 2024, 5:01pm UTC](https://community.ecumaster.com/t/abarth-500-dbw-calibration/2289/20 "2024-09-18T17:01:44Z")
Please check if it will work with software 3.036 ---
**Author:** ![maximejanuario](https://avatars.discourse-cdn.com/v4/letter/m/58956e/32.png) [@maximejanuario](https://community.ecumaster.com/u/maximejanuario)\ **Post date:** [September 18, 2024, 5:20pm UTC](https://community.ecumaster.com/t/abarth-500-dbw-calibration/2289/21 "2024-09-18T17:20:29Z")
It works 😁 thanks a lot !!! ![image](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/d/d8cf078332fc04efa5ddf91509a7906fdfcd2a13.jpeg)