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Post by admin on Nov 23, 2023 11:37:25 GMT
 Source: launch-diag.ru/uploads/chrysler_drb3_adapters_manual.pdfPage 11 Relevant cars: 1998 Talon (SC2 = DRB3 SuperCard2) 1998-2000 Avenger/Sebring Coupe (SC2) 2001-2005 Stratus/Sebring Coupe (ST22) dino2gnt, I wanted to follow up some more on your MMC cable hack. So you borrowed Pin 6 from MMC connector that allowed you to reflash the SBEC3 PCM. Are the CCD-bus pins also there for you? Discussion: what are the other Data pins for? PWM signals? |
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Post by dino2gnt on Nov 23, 2023 16:59:11 GMT
I don't know that I have ever looked at CCD data on the car, only wired on the bench. The wiring diagrams for the 96-99 Eclipse/Talon non-turbo (2gnt), which should be similar or same as the 96-2000 Avenger and Sebring, show 3, maybe 4 connections to the 12-pin diag connector. nawdu.de/files/97-99EL.pdf On page 127, you can see connections on the B-37 12pin which appears to be the CCD connections as they are marked as twisted-pair. Page 310, you can see the J1962 (B-38) with connections on 7 (SCI), 14 (VSS), 16 (12v), and grounds on 4 and 5. On the same page, you can see the SCI connection going to the 12-pin (B-37). |
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Post by admin on Nov 24, 2023 8:32:07 GMT
There is a little confusion because in the DRB3 docs B-37 Pin 25 is labeled EATX-RX, not PCM-RX (B-37 Pin 26). But in the wiring diagram SBEC3 Pin 75 is connected, which is correct.
So if car is manual then:
PCM-RX = B-37 Pin 25,
and if automatic then:
EATX-RX = B-37 Pin 25,
PCM-RX = B-37 Pin 26?
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Post by dino2gnt on Nov 26, 2023 17:34:30 GMT
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Post by admin on Nov 27, 2023 13:30:43 GMT
Can you bootstrap the EATX3 unit with the other SCI-RX pin?
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Post by dino2gnt on Nov 27, 2023 14:05:46 GMT
None of my fleet of cars have an EATX to bootstrap  If I come across an auto in the junkyard in the near future, I will procure one and investigate whether it's bootstrap-able (and, if I am feeling froggy, if it is BDM-able) |
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Post by admin on Nov 27, 2023 14:25:35 GMT
So you have two SCI-RX pins and all your cars have manual transmission? What on Earth?
Btw: I'm all done with EATX3 programming, it behaves almost like the SBEC3 (EEPROM access is easier). You don't need to research it for this project's sake.
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Post by dino2gnt on Nov 27, 2023 15:50:43 GMT
Good to know, I'll continue to ignore them, then  All of my DSMs are manual, but some of them weren't born with a manual trans, they were swapped later. They retain an auto wiring harness, but there is no EATX ecu nor automatic trans in the car. I suppose I could fish the EATX pigtail out of the floorboard and check for continuity to B-37 on whatever wire color... Unfortunately the only natural born manuals I have are '95s that don't use an SBEC3, so that makes it harder to verify. |
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Post by dino2gnt on Nov 27, 2023 20:45:32 GMT
Ah, here we go: Page 159. These PDFs are as old as the platform they document, and whatever did the initial page scans didn't text-ify some of the data so a text search misses things. In B-37, 25 is SCI-RX, 26 is the EATX, 27 and 28 are the CCD + and -
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If I come across an auto in the junkyard in the near future, I will procure one and investigate whether it's bootstrap-able (and, if I am feeling froggy, if it is BDM-able)