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Search: Posts Made By: Dispatch20
Forum: Transmission and Drivetrain 07-01-2021, 07:56 PM
Replies: 121
Views: 74,076
Posted By Dispatch20
Re: OBDII Mt conversion???

I live in Syracuse so not too far from Corning. I'm not sure of you can drive your car this far up here, but we could try swapping the TCU right at my house.
Forum: Transmission and Drivetrain 07-01-2021, 05:25 PM
Replies: 121
Views: 74,076
Posted By Dispatch20
Re: OBDII Mt conversion???

I saw a friend of yours posting for help on the Facebook forum a day or two ago. If you got a P1702 on an automatic SVX, my 1st guess is that you need a new TCU. I probably have a spare OBDII TCU...
Forum: Transmission and Drivetrain 07-01-2021, 05:20 PM
Replies: 121
Views: 74,076
Posted By Dispatch20
Re: OBDII Mt conversion???

:lol: Good to see you catching up on this! This was a fun project. I attached a picture of the final product.
Forum: Transmission and Drivetrain 03-05-2020, 12:38 PM
Replies: 121
Views: 74,076
Posted By Dispatch20
Re: OBDII Mt conversion???

Just checking back in to state that the prototype has been ran for a few months and many thousands of miles with no check engine light. That was a fun project! There isnt really a market for making...
Forum: Transmission and Drivetrain 12-04-2019, 06:41 PM
Replies: 121
Views: 74,076
Posted By Dispatch20
Re: OBDII Mt conversion???

Update: I sent my prototype Arduino setup to someone in thr Facebook group with an OBD2 5MT. He has ran it for hundreds of miles and several days without getting a CEL.

The setup definitely...
Forum: Transmission and Drivetrain 10-13-2019, 06:11 PM
Replies: 121
Views: 74,076
Posted By Dispatch20
Re: OBDII Mt conversion???

Quick update; sorry about all the text and no fun pictures!

I wired a ground wire from the ECU harness pin 17 direct to a ground pin on the Arduino. I think this might have actually helped! I...
Forum: Transmission and Drivetrain 10-12-2019, 08:23 PM
Replies: 121
Views: 74,076
Posted By Dispatch20
Re: OBDII Mt conversion???

Earlier this summer I bought the 1996 Service Manual OBD2 Supplement for $20 shipped on Ebay. I wanted to see what it said about the CEL P1702 code, and any debugging steps. See attached pics for...
Forum: Transmission and Drivetrain 10-12-2019, 08:03 PM
Replies: 121
Views: 74,076
Posted By Dispatch20
Re: OBDII Mt conversion???

I appreciate the support, guys! It does help motivate me knowing people are interested in this.

So after I posted last time, I set up the Arduino and laptop to do more data logging. I was...
Forum: Transmission and Drivetrain 10-06-2019, 05:22 PM
Replies: 121
Views: 74,076
Posted By Dispatch20
Re: OBDII Mt conversion???

So I installed the setup. I ran a wire (purple) from the Arduino up to the ECM, and powered it all up (black wire to fuse tap in fuse panel):...
Forum: Transmission and Drivetrain 10-06-2019, 05:13 PM
Replies: 121
Views: 74,076
Posted By Dispatch20
Re: OBDII Mt conversion???

Update: I previously had issues getting the CEL to go on for code 1702. I think the key is going on highway speeds for 10 minutes or more. Now that I can get the CEL to throw, I can test whether...
Forum: Transmission and Drivetrain 07-21-2019, 03:45 PM
Replies: 121
Views: 74,076
Posted By Dispatch20
Re: OBDII Mt conversion???

FYI - Here is the OBD2 ECU and TCU pinouts:http://www.alcyone.org.uk/ssm/obd2pinout.pdf

Anyways, I am trying to make the P1702 check engine light come on to see how and when it happens. I cut the...
Forum: Transmission and Drivetrain 07-15-2019, 12:17 PM
Replies: 121
Views: 74,076
Posted By Dispatch20
Re: OBDII Mt conversion???

I bet that would work, too. Does anyone have the obd2 wiring diagram for the TCU?
Forum: Transmission and Drivetrain 07-14-2019, 06:12 PM
Replies: 121
Views: 74,076
Posted By Dispatch20
Re: OBDII Mt conversion???

In case you're curious and have some programming background, here is my Arduino C software for data logging the TCU data stream. To print out a nicely formatted line of data, I took advantage of the...
Forum: Transmission and Drivetrain 07-14-2019, 06:03 PM
Replies: 121
Views: 74,076
Posted By Dispatch20
Re: OBDII Mt conversion???

Bumping this topic from 5 years ago, as I'd like to add information relevant to the discussion. I've posted this on the SVX Facebook group but wanted to share it here, as well.

The OBDII TCU->ECM...
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