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J2534 connection issue #56

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frufru99 opened this issue Dec 20, 2022 · 27 comments
Open

J2534 connection issue #56

frufru99 opened this issue Dec 20, 2022 · 27 comments

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@frufru99
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Hi, I compiled FreeSSM on a laptop I use for diagnostics running Windows 7, I have a J2534 cable /like this: https://www.aliexpress.com/item/672381461.html / which I use for Techstream. I wanted to use this cable with FreeSSM on a Forester SG, if I select XHorse MVCI in preferences the interface test fails with the warning that the interface does not support SSM1 protocol but I think it’s not communicating at all. What could be the problem?

@Comer352L
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Comer352L commented Dec 21, 2022 via email

@frufru99
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Thanks for the fast response! I couldn’t find much info about the cables capabilities, it’s a basic xhorse clone cable for Techstream.
I compiled a new version as debug and for some strange reason this one passes the test /with ssm1 and ssm2 error/ and I can communicate with the engine module but not with the ABS. I attached the log.
mylog.log

@L1800Turbo
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L1800Turbo commented Dec 22, 2022 via email

@rfourneret
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rfourneret commented Dec 22, 2022 via email

@L1800Turbo
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L1800Turbo commented Dec 22, 2022 via email

@Comer352L
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Comer352L commented Dec 22, 2022 via email

@Comer352L
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Comer352L commented Dec 22, 2022 via email

@frufru99
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The car is not here right now, I'll try this after the holidays. If I want to check the ABS modul a basic VAG cable is the best option?
Thanks again and Merry Christmas!

@L1800Turbo
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L1800Turbo commented Dec 23, 2022 via email

@rfourneret
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rfourneret commented Dec 23, 2022 via email

@L1800Turbo
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For the older yellow connector like this:
image

You use pin 2 as TX, pin 3 as RX and pin 9 as GND.

On the newer CARB OBD connector you have pins 4/5 for GND, the others should be 12 as TX and 13 RX.

@rfourneret
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rfourneret commented Dec 25, 2022 via email

@L1800Turbo
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They are more SSM version specific.
As for the Forester SG, you have SSM2 for ECU and TCU and (as I would guess) SSM1 for the ABS module.
So SSM2 is shared on a single K Line pin, while SSM1 uses the RX and TX lines with 5V level.
The mentioned pins are for communication with SSM1.

On the 1st gen Legacy you only have SSM1, so that ECU and TCU share the pins 2 and 3 on the yellow connector. ABS doesn't provide any diagnostic connection, you'd have to watch the LED under the passenger seat. Cruise control and Auto A/C use another clocked SSM protocol.

@rfourneret
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rfourneret commented Mar 15, 2023 via email

@Comer352L
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Comer352L commented Mar 15, 2023 via email

@rfourneret
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rfourneret commented Mar 16, 2023 via email

@rfourneret
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rfourneret commented Mar 17, 2023 via email

@L1800Turbo
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On the main screen (or in the terminal) you should see a RomID. Can you mention it?

@rfourneret
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rfourneret commented Mar 18, 2023 via email

@L1800Turbo
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Okay, I don't have these RomIDs yet, they're surely similar, but newer than the ones from the '97 version.
I'll have to get them analyzed first.

As for the assignment, it'll propably be like this:
xx xB xx: ABS
xx x4 xx: CruiseControl

@rfourneret
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rfourneret commented Mar 18, 2023 via email

@Comer352L
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Comer352L commented Mar 19, 2023 via email

@rfourneret
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rfourneret commented Mar 19, 2023 via email

@rfourneret
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rfourneret commented Mar 20, 2023 via email

@Comer352L
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Comer352L commented Mar 21, 2023 via email

@Comer352L
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Comer352L commented Mar 26, 2023 via email

@rfourneret
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rfourneret commented Mar 27, 2023 via email

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