need help with VSC

Thanks for the picture of the live data.

if you compare your picture with mine you can see that my VSC ECU doesn't recognize the gear position/shift lever position.

The calibration instructions state that if the shift lever is not in P, these errors will be output.

I also have the reading "EFI Communication Open": "Error".
maybe that's why it can't be learned.

 

Does anyone of you have a wiring diagram of the ECM or a plan of the terminals of the ECM.

Or maybe even a wiring diagram of the complete car

 

I don't have Port 13 on my OBD Port

 

I don't think this method works for '18 and up. I tried jumping the pins on my 18, but nothing worked. I need to recalibrate my VSC through doing a zero point calibration, so the truck doesn't think it's losing control going around turns or maybe up on a curb. I'd like to not have to buy techstream for it, so if anyone knows a way to do it, it would be greatly appreciated. Or unless someone is willing to lend me their techstream license. Lol

 

Do you have the same size wheels and tires on all four corners? I have seen these errors if the front tires are smaller than the front or visa versa.

 

I think I have another problem:
The VSC ECU doesn't recognize the shift lever position P and that's why I can't relearn the sensors.

I just don't know why the VSC doesn't recognize it because the shift positions in the gearbox ECU are correct

 

this is 2016-17.

 

Thanks

 

Have you try to pull ECU -B 1,2,3 fuse to see if this resets VSC control unit?

 

I haven't tried that yet.
can you tell me where the fuse is (in the engine compartment or in the interior)

 

Engine- big box

 

You can see in the video that the learning process does not work properly because the slip indicator lamp does not flash.

I don't know how the VSC ABS ECU gets the shift lever position

 

Probably via CAN network. This is where the things are getting complicated. Accessing the module itself does not mean it is good. So need to see if the module can communicate with the gateway for the network and other modules are able to see it. Based on your data, it does not get the data from either ecu or tcu.
Could be a bad signal on the pin for vsc, ecu/tcu. May need to look at those harnesses for possible damage.
Do you have any errors on vsc module or others? Have you ran a health check ?
Engine control with Skid module diagram

 

Thanks for the answer. (@Vlady )
The health check and the CAN check with Techstream are fine.
I have sporadically the error U0100 in the VSC/ABS. I will now start replacing the CAN lines.

The only strange thing is that all other values such as the steering angle or the yaw rates are plausible, and they also come via the CAN.

But the transmission ECU is integrated in the engine ECU (ECM), isn't it?

 

I suspect ecu/tcu are integrated, but I'm not positive.
Do you have a new battery to try? That code maybe a clue. Perhaps unplug the battery for a few and see if vsc can see the shift position after the reset.

 

The battery is still good and is always connected to the charger.
I've disconnected them before

 

I have no idea what is going on in this thread but I am rooting hard for OP.

 

pulling the fuse didn't do anything

I just took a closer look at my engine ECU and looked up the part number on the internet. I was told that the part number does not match my vehicle at all, the part was only installed up to 2018 and my Tacoma is built in 2020.

Maybe that's the mistake?

 

So it is an auction car -flood victim. Or water crossing gone bad.
Yes, they probably put thing together to get it running. Pull the ecu calibration id and tcu calibration id. You may need to replace ecu and do trim specific calibration id.