Many of our customers have a huge problem with reading out Jeep Grand Cherokee 2.7 CRD fault codes. It is possible to see engine fault codes with key on-off method, but you can not clear faults without correct OBD diagnostic tool. Also disconnecting battery will not clear fault codes on 2.7 CRD Jeep Grand Cherokee. Sometimes car will clear faults itself after replacing faulty part and driving couple of kilometers twice, but not always. Until today they were correctly read out and cleared only with DRB III and Bosch KTS diagnostic devices. Those devices are pretty expensive and not reasonable to buy for private use. So we decided to make a free diagnostics software that is compatible with 2002-2005 Jeep Grand Cherokee 2.7 CRD and that would work with a cheaper device. So we made our own diagnostic software and designed it to read/clear Jeep WJ CRD engine and transmission faults. Our Jeep diagnostic software is very basic and is not comparable with professional diagnostic equipment. Our goal is to help the car owner to quickly view and erase fault codes without the need to run to workshop and pay money for it. It is mainly for people who sometimes like to fix their car in their home garage. Our Jeep diagnostic software will never be sold for money, It is free forever – to everyone.
For hardware we chose ELM327 diagnostic scanner as it supports all OBD protocols and is compatible with 99% of modern cars. ELM327 is also pretty cheap, genuine ELM327 that uses genuine ELM chip issued by ELM Electronics costs about 50 EUR, Chinese USB clone (non genuine) costs about 10 euros in ebay and every car owner can afford it.
Current version is Windows based and works with ELM327 adapter. This new software can read engine and transmission fault codes and also cleared them. Other modules – ABS, Body, Instrument etc., are not supported. There is no explanation of the codes in the diagnostic program, it just shows what fault codes are stored in your car’s engine/gearbox. You can check explanations at http://www.jeepswj.com/tips/ or just google them, there are a lot of tutorials on the web. Be mentioned that diesel and gasoline Jeep fault codes are different, so if you look from the web, then only look 2.7 CRD codes. Since this is Mercedes engine, many codes are same that in MB. Be mentioned that diesel and gasoline Jeeps codes do not match – if you have 2.7 CRD, then do not look fault code explanations for gasoline models.
Our Jeep fault code scanner is Windows based and should work on Windows XP and greater. We tested it on 32-bit XP, 64-bit windows 7, Windows 8 with ELM327 USB versions and Windows 8.1 Tablet with genuine ELM327 BT version and it works perfectly. This software connects with ELM straight to COM port and if you use BT version, then you should pair ELM327 and connect it with your computer before using our program. Also be sure that you have BT drivers correctly installed on your computer.
You need to have Microsoft .NET Framework 3.5 or greater installed on your computer. Most computers already have it.
Android version working with Android 4.3 and up.
There are problems with Chinese BlueTooth ELM327 clones. It is true that the ELM is only as good as it’s user. Genuine ELM is well made and can communicate through all OBD II protocols and is only limited by its user’s wisdom to use all ELM options. Different case is with Chinese clones – there are nice labels on those devices “Supports all OBD II protocols”, but real life is different. Newer Chinese devices are different from what they used to be. They used to copy ELM chips, but now they made a new device with their own firmware for chips inside the device, added some major protocols and called it ELM327. Those devices do not support necessary commands for ELM configuration and some of them even does not support necessary protocols. Chinese devices are working with some diagnostic software like Scanmaster ELM or Torque PRO on many car models, but 2.7 CRD Jeep ECU and TCM data transfer is much more complex and newer clones are not supporting them. This is the reason why our diagnostic software does not work with many Chinese ELM327 devices. Older Chinese USB clones seem to be working well with our software, problem is with Chinese BT and newer USB devices. We cannot do anything about this. With problematic ELM327 device you will get answers: Fake ELM.
China is a country of surprises and you’ll never know what you get – working device or garbage. At the bottom of this page you can find some feedback and we are pretty sure that those who can not get our diagnostic software to work, are using fake ELM device. Avoid Chinese ELM327 clones, they are not working correctly! ELM327 BT and USB with original chip are working fine. If you want to be sure, buy a device with genuine ELM327 chip.
Configuration commands that ELM must support are:
AT SP 5
You can ask about those commands from seller before buying Chinese ELM device. Chinese Vgate iCar2 iV350 BT and Vgate iCar3 BT devices were working in our tests, but we got feedback from customers that not all Vgate devices work. We asked about supported commands from Vgate, but they have really good skills of ignoring everyone who is asking something more specific. We will keep trying.
There are only a few places in EU where you can buy genuine ELM327 device. We found one from Romania and we bought one BT ELM327 device for testing. Now we can confirm that this device supports all necessary ELM commands and works fine with our software. Here is an image of this ELM327.
Same seller is also selling in ebay and his seller name is car.pulse
Download JeepDiag - Free Jeep Grand Cherokee 2.7 CRD diagnostic software for Android(7427 downloads)
Works with Android 4.3 and up.
Download JeepDiag - Free Jeep Grand Cherokee 2.7 CRD diagnostic software for Windows(9582 downloads)
Download JeepDiag PRO – In developement stage Jeep WJ/WH diagnostic software for Android(98 downloads)
Our new diagnostic software is in development stage and not ready yet. It is more complicated and contains Live Data, different Input-Output values etc. With every start app needs to go into web to check date and recent version works until the end of the year. I will continue upgrading this file until app is completely ready.
Here are some images of Windows based JeepDiag:
Here you can see how engine fault codes are displayed - only codes and no explanations.
Clearing Jeep engine fault codes. After clearing the codes, you will see which codes were cleared and which not.
And below are some images of Android based JeepDiag:
|After connecting ELM327 you will see menu lines. Read Engine and Read Gearbox will read fault codes without deleting. Clear engine and Clear Gearbox will display fault codes and clear them automatically.|
|Your Jeep fault codes will be cleared and you will see if any of the codes are not deleted - if some fault code stays, then problem is not fixed and you need to replace/fix broken part.|
Here you can comment our software. This form is only for commenting on how our program works, if it is fine or did some problem occur. We appreciate any feedback, even if our program will not work as expected. In comment please specify what kind of ELM327 are you using, so everyone will know which version works and which not. All links of working devices are welcome as well. All feedback will be displayed bottom of this page, so everyone can see them.
For any questions, please use form on “contact” page.
17. November 2017 23:10
14. November 2017 18:37
I install the JeepDiag APP on my mobile (Galaxy s8)
Till Last week the APP work perfect
Start today, the APP close automatic and stop
I can not run the APP
I enable the download and the install the APP on my mobile
8. noviembre 2017 19:28
Juan José Rissotto
17. octubre 2017 15:15
15. octobre 2017 15:58
Leur logiciel ne fait rien car le véhicule est trop ancien pour lui (GC 2,7 de 2002).
Mais avec votre logiciel re-initialisation les doigts dans le nez en 1 minute !
10. October 2017 12:39
I have an ELMScan 5 with an ELM 327 Hardware Revision: 3.2 and Firmware Revision: 1.2a.
It's original with RS232 output, but I have a cable from RS232 to USB to my pc.
It communicates nicely, but comes with a mistake. FAKE ELM327 is that the Firmware that's too old?
Will there be a software ver. for iPhone or iPad sometime?
26. septembre 2017 20:55
bravo pour ces explication ,
mon véhicule , grand cherokee WJ 4l , 6 cylindre
vous me conseillez
le elm BT sous android , ou usb sur pc
17. September 2017 00:17
For some reason this app was not able to communicate with my transmission. These guys are working on a new app which I was able to test. The new app communicates just fine with the TCM, and now my Jeep is on the road again.
Don't be afraid to send them an email, and make shoure to give a donation. They're saving you a lot of money;)
14. September 2017 21:29
Just received the BT ELM327 v2.2 from Romania today(www.elm-327.eu). I want to access the gearbox, as i have the P0702 error code on my 2002 Jeep GC 2.7 CRD.
I tried your software on Android and 2 different Windows 10 PCs, but none of them were able to read or clear the gearbox. It was able to read and clear the ECU on all devices though.
Any ideas on how to solve this?
8. septembre 2017 16:36
upload drivers into the device manager and all is ok
8. septembre 2017 13:59
: on this com port no correct elm connected!
thank you for giving me solutions.
8. septembre 2017 13:16
I am very dissatisfied!
I ordered and received usb elm 327 from Romania.
to connect to your software is impossible!
your software only offers one COM 3 port, and I can not connect to the PC.
I have yet to download drivers usb on
the software tells me that I am not connected to com 3.
how to do.????
it is a situation that costs me dear and that does not solve anything and that lasts in time !!!
I tried with two pc (windows 7)
and it's the same problem !!
thank you for following up on my message.
7. septembre 2017 16:14
J'ai essayé avec une copie chinoise à 10 euros, et ça ne fonctionne pas.
MERCI! C'est génial de pouvoir effacer les codes défaut moteur + boite avec un simple téléphone : qui peut en dire autant?
28. August 2017 20:40
23. August 2017 00:14
21. August 2017 15:24
20. août 2017 14:51
renvoie un code errors fak est t il possible que ma prise diag ne fonctionne pas merci de votre reponse
2. Agosto 2017 14:31
13. juillet 2017 00:39
I've seen on comments you have worked on a live data reading application. Can you send it to me?
4. July 2017 07:14
16. juin 2017 07:54
Merci pour votre appli, elle est au top.
J'ai des soucis de démarrages aléatoires.
Vous n'avez pas de solutions pour pouvoir lire les valeurs en temsps réel sur PC?
29. May 2017 14:25
29. May 2017 13:53
22. mai 2017 10:40
Perfect conection with ELM from Romania (use usb version, just need install the correct drivers)
Easy to know errors and clear them
13. May 2017 18:41
13. mai 2017 00:44
Est-ce qu'il y a un module de diagnostic pour G Cherokee WJ modèles 1999-2001? Si oui pourriez-vous m'aiguiller la dessus.
5. May 2017 21:26
5. May 2017 21:17
Tried a cheap Chinese cable but a waste of time, I recommend you buy one from these Romanian guys!
Thanks for developing this diagnostic software, a beer (or two) is on it's way!
28. April 2017 22:30
Leider bekomme ich immer die Meldung: On this Com Port no correct ELM connected!
Treiber i.O., ELM327-Clon, funktioniert bei anderen Marken mit ForScan, Carsoft demo, etc.....
Was kann ich tun, damit JeepDiag mein Elm erkennt?
Grüße Alex R
14. April 2017 16:53
14. aprile 2017 13:45
25. March 2017 23:45
25. marzo 2017 23:30
17. mars 2017 21:17
Sinon il fonctionne, reste à voir si après réparation de ma panne il parviendra à rétablir le bon fonctionnement de ma voiture en effaçant les codes défauts.
15. March 2017 18:03
15. März 2017 13:22
kann ich diese Software auch für meinen Jeep Grand Cherokee BJ. 2000, 4l,nutzen?
Ich will Motor- und Getriebe-Codes auslese und löschen können.
9. March 2017 20:22
5. March 2017 14:07
5. März 2017 12:49
21. février 2017 19:31
j'ai le code d'erreur atwm8120f33e not supported by ELM
Communication error? Fake ELM!
j'ai un ELM327 generique "tout protocoles" dois je acheter un autre ELM ?
si oui pouvez vous me donner un modèle chinois pas trop chère que vous avez testé
20. February 2017 15:29
15. Februar 2017 19:38
Danke an das jeepwj.com Team !!!!
15. Februar 2017 14:26
For Helping give no code elm have no code.
Thanks sale the car is better
15. February 2017 10:32
If P0700 or P0702 is active and comes back after clearing, then there must be some other code stored in transmission that is causing P0700 and P0702.
P0700 and P0702 are "Transmission generic electrical" faults and they are stored in ECM (Engine Control Module). They appear only if transmission has an active fault code. If transmission has some electrical problem, then fault will be stored in TCM (Transmission control Module) and also TCM will report about this to the ECM. By this report ECM will store P0700 or/and P0702.
For this reason P0700 and P0702 can not be alone.
13. Februar 2017 15:12
wir haben ein Problem grand Cherokee 2,7 crd es war zuerst p702 p700
Notlauf die Fehler wurden gelöscht.
Wieder notlauf unter dem fahren geht gang raus und schaltet nicht mehr.
Werkstatt macht Kontrolle magnete usw Fehler gelöscht geht nicht mehr.
Dann kamm Fehler p 1685 habe ich mit dem elm327 gelöscht gearbox keine Fehler engine keine Fehler aber er schaltet nicht !
Vielleicht haben sie einen Tipp.
8. febrero 2017 12:15
when i enter in transmisión put sometimes the p0702 but also the
p2310.. what means it?
6. febbraio 2017 12:12
4. Februar 2017 15:57
Leider habe ich per post ein elm327 bekommen kann nur wifi kein BT ihre Software Android kann nur BT oder gibt es eine BT Lösung.
Hatte Getriebe Probleme 2.7 crd 2003. code 700 702 wurden gelöscht und jetzt Geht gar nichts mehr Getriebe schaltet nicht schluesselmode 1685 Fehler Datenbus aber genauer kann ich es nicht sagen
2. February 2017 16:52
26. janvier 2017 11:16
J'ai pu lire les codes sur un wg de 2004 et 2003 sans probleme.
Par contre sur une suite de code comme :
Seul P1511 ne s'est pas effacé. Normel ou paqsje ne sais pas, mais je tenais a vous le signaler.
Si seulement vous aviez crée se logitiel en 2011, cela m'aurait evité bien des deboirs.
Je vous remercie et vous souhaite bonne continuation.
25. January 2017 21:32
25. January 2017 18:31
24. January 2017 21:30
Jeeps with other engines have different data bus protocol and they are not supported.
23. Januar 2017 16:18
Funktioniert sie Software auch für einen 99er 4.7 4x4?
Danke und Grüße
22. January 2017 22:51
Seems like you did not pair ELM327 device with your phone. Every Bluetooth device should be paired before you can use it.
20. janvier 2017 17:54
je viens d'acheter une prise ELM327 VER1.5A PRO sur ebay. Je viens d'installer votre petit soft. Mais lorsque que je veux lire les PCodes il m'affiche "On this Com Port no correct ELM connected!"
Pourriez vous m'aider?
16. janvier 2017 19:14
J'aimerais un logiciel qui diagnostique la transmission, donc votre logiciel me plairait, mais sur un Jeep grand cherokee wh ou wk de 2005, crd 3.0L 218 cv, marcherait il ?
8. enero 2017 21:04
28. December 2016 15:46
Diagnostic configuration : ELM 327 chinois V1.5 à 10 euros connecté sur USB W7/PC USB. Grand merci à http://jeepswj.com/software/
Gearbox default fixed (second speed only after use of faulty battery) : P2602, P222 and P0700 cleared.
Configuration Tool : chinese 2016 ELM327 V1.5 - USB interface connected on W7/PC.
Many thanks to http://jeepswj.com/software/
20. décembre 2016 07:43
7. December 2016 23:30
happy customer in the FALKLAND ISLANDS
2. December 2016 21:08
30. novembre 2016 18:17
Mon grand cherokee 2.7 crd est de 07/2002, sur le site que vous conseillez pour achater le ELM 327, ils disent que sur les moteur diesel l'appareil lit les défault à partir de 2004, à ma connaissance le grand cherokee 2.7 crd de 2002 est le même que celui de 2004, pouvez vous me confirmer que le ELM327 de l'adresse : http://www.elm-327.eu/ fonctionnera avec mon cherokee
23. novembre 2016 19:28
14. November 2016 15:42
wenn ich die Fehler auslesen will schreibt das Programm kein Port vorhanden
13. November 2016 11:40
I would like to ask you guys to enable ratio setup - we the jeep owners would like to increase the tier diam and compensate with bigger gear ratio.
Increasing the gear ratio require updates to the gear computer otherwise it got into limp due to "mismatching" speed report from the abs sensors.
Your help is appreciated.
3. October 2016 13:50
1. October 2016 22:40
reading engine faults:
ATWM8115F13E not supported by ELM comumunication Error
28. September 2016 14:05
13. September 2016 22:46
13. September 2016 11:34
Have you the jeep diagnostic software in Wi-Fi version? Accidently I bought the Wi-Fi version from the website what you mentioned, from Romania.
10. September 2016 13:15
Where is the best place to buy an ELM327. I am in South Africa.
31. August 2016 13:04
25. August 2016 21:32
Henning Le Roux
Tomorrow I take her for a drive and see.
9. August 2016 13:15
At the moment we are developing an app that is almost dealer level for WJ - supported will be all modules of those cars: keys, immo, ABS, body, doors, entertainment etc. Also live data and tests. It is huge work, it takes time and we are on time if we can release it by the end of this year.
9. August 2016 09:44
Rev Samuel MSE Kayuni
My name is Samuel from Malawi Africa. I own a small business of renting and selling used 4x4s from UK market.
Latterly have sold many Jeeps with Diesel engines
CRDs. Right now I have 10 Jeeps parked at my yards have various issues like Keys not recognized,immobolizers, gears limp modes etc
I bought various diagnostic scan machines like launch, dvatage and the last one called DG VSI2554 I need soft ware that I can install in the machine that can handle issues of my Jeeps. Any idea please help.
I look so stupid to the people have supplied Jeeps of various models. I love these vehicles when running properly.
2. August 2016 14:20
vielen Dank für die Bluetooth Version!
Dieser Bluetooth-Adapter hier zum Preis von €19 funktioniert sehr gut, auf Android und Windows 7 getestet:
many thanks for the bluetooth version!
this bluetooth Adaper functions very well, I tested it on android and Windows7.
22. July 2016 07:36
I've encountered an issue with aux position on the Ignition where the radio is suppose to go on when the vehicle is of, immediately after clearing codes with your software. Got the same elm 327as in your pic connecting to usb. have you anny solution or help.
5. May 2016 21:32
Those Romanians are making good stuff for reasonable price and their devices are worth every penny.
23. avril 2016 15:14
Are you sure elm327 USB (not BT) from car.pulse on ebay works ? because I've just buy one on ebay (from an other seller Diagscan) and it does'nt work, message : "communication error : fake elm" (I think it's a chinese version). My ELM is an usb V1.5a.
14. avril 2016 23:07
I received the real ELM327 Bluetooth from Romania today.
Your jeepswj software reported it as ELM version 2.1.
I connected the Bluetooth ELM to a virtualized XP Pro SP3 running under Parallels Desktop 9 on my Apple laptop (OS 10.7.5).
A little tricky to pair it but I get it working.
I successfully erased a remaining default engine code on my 2.7CRD.
I also paired the ELM with my smartphone (Galaxy S2) without any trouble.
But I don't have appropriate app to communicate with the jeep TCU, I can just read engine codes (french OBDfacile app).
Would you send me the (beta) Androïd app so I can try it ?
Thanks for all your work !!!
7. avril 2016 14:36
7. avril 2016 12:30
Just to let people know that BT original ELM327 is out of stock from elm-327.eu website above. I emailed the seller. Without BT unit I can't test the Android pre-release ...
6. April 2016 09:23
3. April 2016 00:55
Just for the feedback, my elm 16bit branded ROH I'd with a previous software doesn't works. I will try an other later.
Nice site, a lot of infos about WJ et some produts interesting.
GB from France.
2. April 2016 13:43
31. März 2016 11:34
funktioniert das auch mit einem Jeep Grand Cherokee BJ 2004, WG, V8-4.7L
Danke und Grüße
29. March 2016 21:16
It happened after 10 months and 3000 downloads. Thank you Fernand.
18. March 2016 13:42
18. March 2016 13:16
25. February 2016 18:51
We did not have any WIFI ELM when we made our software and it will not work. Probably we will not upgrade it cause at the moment our goal is to make an Android version.
15. février 2016 14:30
Does your software works with WiFi ELM module ?
I got one from a friend before receiving the cabled unit from China (MartyVayne's link, thanks to him if it works for me !!).
It may be tricky to connect the ELM from your software (I don't know which port WiFi could use).
11. febbraio 2016 09:35
Il vostro programma funziona alla grande con Windows xp è Elm 327 usb Made in Cina
Appena collegato porta com 3 legge e resetta tutti gli errori del motore e del cambio del mio GC WJ 2.7 crd del 2002.
Sarebbe bello riuscire a controllare anche eventuali problemi del climatizzatore o altro
Sono ansioso di provare anche la versione Android
Complimenti e Buon lavoro.
8. February 2016 18:01
Reads the gearbox codes but not the engine codes.
7. February 2016 17:49
For example Vgate iCar2 BT device worked well, but until manufacturer has not confirmed supported command list, we can not be sure that all Vgate devices work. Vgate is not very cooperative to answer to us, but we will keep on asking them.
7. February 2016 17:14
I bought a Chinese ELM327 cable connecting to your program, I appeared massage FAKE ELM.
Does this mean that I have to buy original cable?
Thank you .
7. February 2016 17:08
7. February 2016 14:52
cannot access the download via android or ipad..Is it still available?
6. February 2016 18:04
5. febbraio 2016 12:38
3. Februar 2016 16:38
2. February 2016 23:25
Took a gamble on the Chinese fake but didn't work.
2. February 2016 11:15
2. February 2016 11:05
1. Februar 2016 20:33
when do you think the Andoid-Version is ready to use. We are already waiting impatiently for the app :-)
1. February 2016 18:49
1. février 2016 14:36
i use window vista.
27. December 2015 19:08
27. diciembre 2015 17:42
22. décembre 2015 19:16
j'ai testé sur ma voiture et ça ne fonctionne pas, jeep wj 2003 2.7 crd
le logiciel ce connecte au cable mais ensuite pas moyen de lire les code d'erreur, avec le conctac, sans contact et même moteur tournant rien ne se passe.
22. December 2015 11:35
22. December 2015 09:40
19. Dezember 2015 10:39
It has the PL-2303 XA/HXA chip build in, which only works on windows XP and Windows7, myself I use an Eeepc with windows XP.
Engine and transmission errorcodes reading and erasing perfectly!!!
I´m looking forward for the android version.
Many thanks to the developer, who made it possible to read and erase error codes on Jeep WJ/WG 2.7 crd!!!
16. December 2015 22:00
Used USB ELM 327 v1.5 Chinese clone. Bit of a gamble, but worked first time!
Costs about 7 euro's on ebay which includes international shipping!
Slow on arrival (takes about 2 weeks), but quality seems ok on first glance. Comes with driver CD, but didn't need that. Plug and play on Windows 7.
Able to read and clear two old codes from engine and reads transmission no problem.
ebay link: http://www.ebay.nl/itm/Mini-ELM327-USB-V1-5-OBD-II-OBD2-Auto-Scanner-Scantool-/190892911763?
seller's name is is eto666
Order and use Chinese clones at your own risk, just sharing my personal experience with this particular product.
5. December 2015 23:05
Thank you so much for your help and advice on my Jeep issues.
I downloaded your free software and bought a ELM from the site you
All good, retrieved/cleared the fault codes.
Can't thank you enough - you saved me a lot of cost at the Dealership.
5. Dezember 2015 15:41
Super Sache weiter so echt TOP!!!!
27. novembre 2015 11:15
par avance merci
6. November 2015 21:24
bought the ELM327 usb v1.5a OBDII protocols and when connected to 2002 grand cherokee 2.7crd I get error messages Not supported Engine & Not supported TCM when trying to get fault codes.... trying to find codes and clear (in limp home mode), cleaned all contacts on gear selector module and want to clear fault codes with no success :(
3. November 2015 01:21
It works with my old Serial-USB ELM327 ver1.3a OBD interface on Windows7 32 bit.
(first pluged in the ELM, let windows to install the driver to COM9, then start your Software. Choose COM9 and it worked first time!)
Your software were able to read both Engine and transmission error codes and cleared them as well.
30. October 2015 00:00
6. October 2015 09:42
Dag Erik Johansen
7. September 2015 15:25
With the USB type of ELM adapter - it works like a charm!
Great software - the Android version wuld be perfect add!
29. August 2015 14:58
So far with my BT ELM version on Win10 Dell laptop I was unable to read anything. I'm not sure if ita due to the PCELM connection or more to the ELM istelf. I can only say that with the same adapter and my cellphone I can connect to Jeep with some OBD2 apps and see basic parameters.
I will try to oder the recommended usb version of adapter and gove it a try.
But it would be great if this will work as Android APP with the BT adaper. It would be just perfect!
23. August 2015 20:49
18. August 2015 23:46
14. August 2015 14:11
I buy yours elm327 recommandation, it's ok
Have a nice day!
8. June 2015 17:10
Thank you very much.