Limp mode after replacing throttle body

[Zakhil]

Morning all, Merry Christmas and super new year!

I really hope this is the last time I have to post in this category.

Does anyone know of a guru in Mossel Bay or George, or frankly anyone along the garden route?

Update, I have received a throttle body and harness plug from Graham. The mechanic installed it and connected the same colour wires to the existing harness. After that, the diagnostic still showed the attached error and remains in limp mode.
A few auto electricians have now looked at it, car standing months at some of them, and no one can find the issue.

Description: Graham installed the turbo on the TB48 and cut and stuck blue intake hoses over the connecting pipes. One of them came loose and fell into the engine which caught fire and burnt the throttle body sensor. That’s why the throttle body needed replacement.

So if there are no contacts around here, could anyone help in diagnosing this issue? It’s been 5 months!!

[ChristoSlang]

Hi Zak!

I presume the error wasn't there with the old throttle body and that the mechanics have cleared the DTC codes after fitting the new one?

I also find this a bit weird - are they reading the right code?

Y62 or Y61?

Y62.PNG (455.62 KiB) Viewed 492 times

[Zakhil]

Hi Christo,

Thanks for the reply!

There were different error codes because of the melted body sensor. They did clear everything though.

About the model, I also immediately showed him the model that he selected and that it's wrong, but he said it doesn't matter. Which I highly questioned. although the attached is from another sparky which used the correct model and got the same error.

[jonathan]

Hi Zak

I've had similar issues with limp mode pointing at the throttle body as the cause. After many months of looking for the problem and changing the throttle body, it turned out that the problem was not with the throttle body but with the ECU.

I remember Pearly here on the forum had a similar issue, but in his case it was the AT CONT. relay that sits in the left front of the engine bay. Might be worth swopping that out, it's a lot cheaper than an ECU!

[Zakhil]

Hi Jonathan,

Wow and thank you so much. At least I have a point to start looking. I really hope it's not the EECU but if it is, then the mechanic blew it. He explained what he did and sounded like he manually pushed the butterfly open when the car was on, which I heard will blow the ECU. Anyway, let me try the relay, will post update when done.

[Michael]

Im no expert here, but I did learn a couple of things about the TB48 throttle body and transmission when we installed the Merc OM613 in the TB48.
So the transmission and the throttle body works together and the ECU needs to communicate with both and everything needs to be within tolerance. We had our hands full to try and manipulate the signals just so the transmission will allow us to shift.
I know on the VW and Audi's you cannot fiddle with the throttle body, unplug it or push open the butterfly. This will cause it to go into limp and the only way to fix it is to "re-callibrate" the TB.
This is a simple procedure with a decent scan tool, so hope this is the case with your Patrol

[Zakhil]

Hi Zak

I've had similar issues with limp mode pointing at the throttle body as the cause. After many months of looking for the problem and changing the throttle body, it turned out that the problem was not with the throttle body but with the ECU.

I remember Pearly here on the forum had a similar issue, but in his case it was the AT CONT. relay that sits in the left front of the engine bay. Might be worth swopping that out, it's a lot cheaper than an ECU!

Hi Jonathan,

I took the AT CONT out and it did look sketchy with a slight brown spot on its side. Will get new relays but I exchanged it for now with the REVERSE LAMP relay. Did you guys have to clear or reset everything to fix the issue or was it corrected instantly?

[Zakhil]

Im no expert here, but I did learn a couple of things about the TB48 throttle body and transmission when we installed the Merc OM613 in the TB48.
So the transmission and the throttle body works together and the ECU needs to communicate with both and everything needs to be within tolerance. We had our hands full to try and manipulate the signals just so the transmission will allow us to shift.
I know on the VW and Audi's you cannot fiddle with the throttle body, unplug it or push open the butterfly. This will cause it to go into limp and the only way to fix it is to "re-callibrate" the TB.
This is a simple procedure with a decent scan tool, so hope this is the case with your Patrol

Thanks for this Michael.

I'm guessing the decent scan tool are those used by the mechanics and not something I can get easily? If so, I'll take him to a shop when the Mossel Bay frenzy comes to an end, and ask someone to recalibrate the guy. Hope they''ll know what I'm talking about.

[Michael]

You can get really good ones for cheap these days. Look on takealot, there is a unit called "Thinkdiag" which you can pick up for under 3k and it does exactly what a 20k Launch does.
I have been using it for more than a year and it works on all cars plus its small enough to fit in your pocket

[Zakhil]

After sending that message I checked on takealot and saw a few thats very cheap. There's even a Konnwei for R300, I'm guessing it's no good if the Thinkdiag is R3k.