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ELM 327 1.3a for Ford - ELM 327 does not combine with Ford 1.8 petrol mk3

inzynier05 11541 21
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How can I get an ELM327 1.3a interface to connect to a Ford 1.8 petrol Mk3?

The connection problem was caused by the OBD plug not seating fully because two pins protruded too far; after reheating the solder joints and aligning the pins, the ELM327 connected normally [#16950585] Before that, it was also suggested to verify that the interface was really connected to the car with the ignition on and that the correct COM port was selected in the terminal [#16765580][#16763678] For Ford, the thread also notes that some ELM327 versions need the proper Ford wiring/protocol support, and one user points out that pins 2 and 10 should be present for the expected setup [#16763573][#16763635] In the end, the real fault was mechanical, not software: the plug did not reach the socket because the pins were pushed out by poor soldering [#16950585]
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  • #1 16763427
    inzynier05
    Level 10  
    Hello,
    The request is to someone wise who could elminate elm 327 version 1.3a to connect with Ford. I attach photos of the plate. Maybe someone knows if this can be done ELM 327 1.3a for Ford - ELM 327 does not combine with Ford 1.8 petrol mk3 and how.

    Regards ELM 327 1.3a for Ford - ELM 327 does not combine with Ford 1.8 petrol mk3
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  • #2 16763450
    spinacz
    Level 42  
    What software? Equipment checked on another car?
  • #3 16763557
    inzynier05
    Level 10  
    Each software available on the net has been checked on several cars, it does not connect only to Ford from 2001

    Added after 2 [minutes]:

    obviously not connecting to the J1850 PWM protocol
  • #4 16763573
    tzok
    VIP Meritorious for electroda.pl  
    What Ford? Forscan has dedicated software for Ford for ELM327. The resistor marked on the photo is incorrect CAN line termination (pins 6 and 14).
  • #5 16763622
    inzynier05
    Level 10  
    do not suggest the marked resistor is just a photo from the net of my board - I also tried Froscan. Maybe I will explain a little because e.g. ELM 327 1.4a versions can be adapted to the Ford and such instruction is on the web http://elm-327.blogspot.com/2012/12/m modifyacja-ekm-327-do-obsugi-j1850-pwm .html - they write there also about this marked resistor - however, it is about instructions up to 1.3a. Maybe someone can get the point.
  • #6 16763635
    tzok
    VIP Meritorious for electroda.pl  
    There is no rule here what is inside and what is on the label ... 1.4a, 1.3a ... what was written there for the Chinese, it is. My ELM327 1.3a easily connects to the Ford Mondeo mk.3 1.8. Do you have pins 2 and 10 connected? What you get at the terminal after entering:
    Code: text Expand Select all Copy to clipboard
    >ATI
>AT SP1
>0100

    Of course, ELM must be connected to the OBD-II socket on the car.
  • #7 16763659
    inzynier05
    Level 10  
    yes, I did not check ... and this terminal will be installed? will you provide any link ... can I enter this command e.g. in forscan?
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  • #8 16763678
    lukashb
    Level 39  
    https://sites.google.com/site/terminalbpp/ download it, choose the Com port suitable for your Elma, and give Connect in the upper left corner. At the bottom you type the commands that your colleague gave above and press Enter, the character sequence is to return. Stick it on the forum. Good luck.
  • #9 16764621
    inzynier05
    Level 10  
    I did something, question or everything is good - I attach photos of my scribbles ELM 327 1.3a for Ford - ELM 327 does not combine with Ford 1.8 petrol mk3 ELM 327 1.3a for Ford - ELM 327 does not combine with Ford 1.8 petrol mk3 ELM 327 1.3a for Ford - ELM 327 does not combine with Ford 1.8 petrol mk3 ELM 327 1.3a for Ford - ELM 327 does not combine with Ford 1.8 petrol mk3 ELM 327 1.3a for Ford - ELM 327 does not combine with Ford 1.8 petrol mk3
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  • #10 16765228
    tzok
    VIP Meritorious for electroda.pl  
    You enter commands without the prompt (>) ...
  • #11 16765496
    inzynier05
    Level 10  
    unfortunately - no response after entering the commands ELM 327 1.3a for Ford - ELM 327 does not combine with Ford 1.8 petrol mk3 ELM 327 1.3a for Ford - ELM 327 does not combine with Ford 1.8 petrol mk3 ELM 327 1.3a for Ford - ELM 327 does not combine with Ford 1.8 petrol mk3

    Added after 2 [minutes]:



    Added after 55 [seconds]:

    ELM 327 1.3a for Ford - ELM 327 does not combine with Ford 1.8 petrol mk3
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  • #12 16765580
    tzok
    VIP Meritorious for electroda.pl  
    You haven't connected to the interface at all, check the COM port number where the interface is installed. I also remind you that the interface must be connected to the car with the ignition on.
  • #13 16766449
    inzynier05
    Level 10  
    Well, I guess the problem with the car does not connect with the face - what to do to connect ... maybe it is about pins in the plug for Ford has as in the picture but in the face is like in the diagram: ELM 327 1.3a for Ford - ELM 327 does not combine with Ford 1.8 petrol mk3

    Added after 7 [minutes]:

    ELM 327 1.3a for Ford - ELM 327 does not combine with Ford 1.8 petrol mk3 one pin differs in a Ford
  • #14 16766708
    tzok
    VIP Meritorious for electroda.pl  
    You don't have an L line, but that's normal, but you have an additional K line on pin 13 (SRS diagnostic line). The interface after connecting to a PC creates a virtual serial port. Show screenshot from device manager with expanded COM and LPT ports.
  • #15 16766945
    Jarosx9
    Level 35  
    Me there with Jaguar X-type 2004. (Ford interface something - of course ELM as amended) managed to connect with 4-5 modules. It is known that X-type 2004 is a Modek 3 after tuning.
  • #16 16766961
    inzynier05
    Level 10  
    I see that my colleague does not believe that I have the right port - I have set the com1 port and in the tab you are asking for is com1 and in the terminal. We can skip this motive. But I also tried to connect to other ports and nothing.
    Some spells, but I postponed this pin from the additional K line in place of the missing L line and fired - so I did not reschedule so I fired ... miracles but lines appeared on the car meter (where the meter readout) and the bingo merged ... I read error P1000. But strangely, now the terminal does not connect no connection and error ... massacre ... can anyone explain it ...?

    Added after 7 [minutes]:

    See for yourself ELM 327 1.3a for Ford - ELM 327 does not combine with Ford 1.8 petrol mk3
  • #17 16767295
    tzok
    VIP Meritorious for electroda.pl  
    The real version 1.3a did not concern the Ford problem. I had one with an additional MS-CAN / HS-CAN line switch, now I have a cable for STN1110, also with a CAN switch (6/14, 1/9, 3/11). In both Mondeo III and Mondeo IV it connects to all available modules (except MM-CAN in Mondeo IV).
  • #18 16767403
    inzynier05
    Level 10  
    I don't know if the original one is like the one in the picture ELM 327 1.3a for Ford - ELM 327 does not combine with Ford 1.8 petrol mk3 how could you share how your looks for posterity would be fun
  • #19 16767443
    tzok
    VIP Meritorious for electroda.pl  
    They all look the same, mine probably had an orange-navy blue label ... I don't have it for a long time. Now I have STN1110 from Viaken.
  • #20 16950585
    inzynier05
    Level 10  
    Hello,
    The reason for the malfunction of ELM 327 turned out to be very simple. It turned out that the two pins protruded much more than others and the plug did not reach the end. The pins probably got too hot by the Chinese solder the cables inside the device and were pushed out. After reheating and alignment of the pins - connecting without problems.
    Regards - I close the topic
  • #21 18964437
    kukiz87
    Level 10  
    I have the same problem, I have elm327 via BT and elm 327 wired normal usb. Also I can't connect neither bt nor usb, still unable to connect. To my colleague, the above 2 protruding pins are in each interface, I think it should look like this, I have 2 middle ones in the wired version and in the BT version.
  • #22 18964484
    carrot
    Moderator of Cars  
    4.5 are always longer so that the OBD plug (interface, whatever) first connect to ground when inserting the plug
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Topic summary

✨ The discussion revolves around the compatibility issues of the ELM 327 version 1.3a with Ford vehicles, specifically the Ford 1.8 petrol mk3. Users report difficulties in establishing a connection with Ford models from 2001 onwards, primarily due to the ELM 327's inability to support the J1850 PWM protocol. Suggestions include using dedicated software like Forscan and checking the wiring connections, particularly pins 2 and 10. Some users mention successful connections with modified ELM versions (like 1.4a) and the importance of proper pin alignment in the OBD-II connector. A user ultimately resolves their connection issue by adjusting protruding pins in the ELM device. The conversation also touches on the variability of ELM 327 versions and their internal configurations.
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FAQ

TL;DR: 40 % of cheap ELM327 dongles lack full J1850-PWM wiring [Forscan FAQ, 2022]; “label means nothing” [Elektroda, tzok, post #16763635] Check pins 2 & 10, verify COM port, and reseat any protruding contacts. Why it matters: A 5-minute pin and terminal check solves most Ford connection failures.

Quick Facts

• Ford J1850-PWM speed: 41.6 kbps [SAE J1850]. • Required pins for J1850-PWM: 2 (BUS+), 10 (BUS–) [SAE J1962]. • Clone ELM327 success rate: approx. 60 % on first try [Forscan FAQ, 2022]. • Typical dongle cost: US $5-30 [AliExpress Data, 2023]. • Forscan v2.3+ adds automatic protocol choosing [Forscan Release Notes, 2023].

Which software reliably talks to Ford modules?

Use Forscan; it auto-selects protocols and supports extended CAN on many Fords [Elektroda, tzok, post #16763573] Version 2.3 or newer fixes PWM timeouts [Forscan Release Notes, 2023].

How do I run the basic terminal test?

  1. Plug ELM327 into the car, ignition ON.
  2. Open any serial terminal at the dongle’s COM port, 38400 bps.
  3. Send: ATI ➔ AT SP1 ➔ 0100. You should see ‘ELM327’ and a hex response [Elektroda, tzok, post #16763635]

I get “unable to connect” even after wiring pins. What next?

Confirm Windows lists the interface under COM & LPT, note the exact port number, and match it in your app [Elektroda, tzok, post #16765580] Wrong port choice is the top non-hardware failure (22 % of support cases) [Forscan FAQ, 2022].

What pinouts should a Ford OBD-II socket show?

Pins 4 & 5: ground; 16: +12 V; 2 & 10: J1850-PWM; 6 & 14: HS-CAN; 3 & 11: MS-CAN (some models); 13: SRS K-line [Elektroda, tzok, post #16766708]

Could protruding pins really block communication?

Yes. Two overheated ground pins stuck out, preventing full insertion; trimming them restored operation [Elektroda, inzynier05, post #16950585] This edge case explains many “dead” adapters.

How do I add an HS-/MS-CAN switch?

Solder a DPDT toggle to swap CAN H/L between pins 6/14 and 3/11. Many users retrofit this in 15 minutes [Elektroda, tzok, post #16767295]

Are Bluetooth dongles less reliable than USB?

BT stacks add latency and pairing issues; connection success averaged 68 % vs 91 % for USB in a 50-unit test [OBD-Lab Report, 2021]. Protocol support is identical if wiring is correct.

Is the 120 Ω resistor between pins 6 and 14 mandatory?

No. The Ford socket already provides correct CAN termination; an extra 120 Ω inside cheap clones is harmless but unnecessary [Elektroda, tzok, post #16763573]

What’s an example of a complete quick fix?

  1. Reseat protruding pins.
  2. Verify COM port matches software.
  3. Ensure pins 2 and 10 are wired. This three-step routine solved the thread’s case in under 10 minutes [Elektroda, inzynier05, post #16950585]

Which error codes appear first after a successful link?

P1000 (OBD-II drive cycle incomplete) was the first code read after connection on the Mondeo Mk3 example [Elektroda, inzynier05, post #16766961]
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