Multiple Problems after swapping Computers

[02maher]

Hello everyone!

I had to swap the main body ECU, Cluster, ECM, Door control receiver and of course the key transmitter. All of that was because of an immobiliser issue that no one here in Dubai could fix not even Toyota which said that they have to replace the whole system which would have cost me more than my car.

My car is a Gt86 2013 and I got these new parts From a scrap car, a Frs 2013.

My original parts ; GCC ECU, cluster in km/h with no digital speedometer, ECM with no cruise control, door control receiver without TPMS (4 wires Plug), 3 button key transmitter (no panic button).

My new parts ; American ECU, cluster in miles and digital speedometer, ECM with cruise control, door control receiver with TPMS (5 wires, extra wire connected to the ECU-IG1 fuse), 4 button key transmitter.

Here are the problems that I’m facing:

P0301 Cylinder 1 misfire
P0451 Evaporative Emission Control System Pressure Sensor Range/Performance
P0453 Evaporative Emission Control System Pressure Sensor/Switch High Input
P2401 Evaporative Emission Leak Detection Pump Stuck OFF
P2419 Evaporative Emission Pressure Switching Valve Stuck ON
>when I plug the old body ECU and perform a health check none of these codes are detected.

The doors open remotely but the trunk doesn’t ; both with the old and the new door control receivers, also programming with techstream to make it that one press unlocks the driver door only and 2 presses unlocks both doors doesn’t really work ; pressing once the unlock button makes the car act like it’s unlocked (Blinking warning light and cabin light turns on) but doesn’t , pressing twice unlocks it. No problem with locking only one press.
>With techstream in the active test of body control I can open the trunk. And when I put back the old body ECU the buttons operate normally and the trunk opens remotely... weird right?

Any idea suggestion? Thanks 🙏

[Ashikabi]

My first guess is that the USDM computer and Dubai region ones are not wired identically, which is causing the EVAP problems. As far as the immobiliser is concerned, have you considered bypassing it with an aftermarket keyless entry system? Might be a workaround

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[02maher]

Originally Posted by Ashikabi

My first guess is that the USDM computer and Dubai region ones are not wired identically, which is causing the EVAP problems. As far as the immobiliser is concerned, have you considered bypassing it with an aftermarket keyless entry system? Might be a workaround

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Can you explain more please on how to do that?

I believe it’s impossible to bypass the immobiliser since I lost the transponder chip... For some reason my old body control ecu is throwing sometimes the code U100 for lost communication with ecu/bcm. I tried many times erasing the key codes to register a new key without success 🤷🏻*♂️

[Ashikabi]

Originally Posted by 02maher

Can you explain more please on how to do that?



I believe it’s impossible to bypass the immobiliser since I lost the transponder chip... For some reason my old body control ecu is throwing sometimes the code U100 for lost communication with ecu/bcm. I tried many times erasing the key codes to register a new key without success *

Talk to a shop that handles remote start or security system installs. They are the ones who use these types of things. If you can't get the computer to recognize the transponder to begin with then it might not work. Only other thing I'm coming up with is to go full aftermarket on everything, including the gauge cluster and computer and go full race car. That's obviously not ideal but I don't really have any more ideas. If you Google "keyless entry system" or some similar search terms you should find a couple companies that offer products. Still not certain they will work though

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[Ashikabi]

Originally Posted by 02maher

Can you explain more please on how to do that?



I believe it’s impossible to bypass the immobiliser since I lost the transponder chip... For some reason my old body control ecu is throwing sometimes the code U100 for lost communication with ecu/bcm. I tried many times erasing the key codes to register a new key without success *

Did you buy your car used? Maybe all the evap codes were turned off by a tune that is on your original ECU but not the new one

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[02maher]

Originally Posted by Ashikabi

Did you buy your car used? Maybe all the evap codes were turned off by a tune that is on your original ECU but not the new one

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Yes I bought it used... it might be the case but how would I know

[02maher]

BTW these evap codes are preventing me to use the vsc sport on mode and the cruise control

[Ashikabi]

Originally Posted by 02maher

BTW these evap codes are preventing me to use the vsc sport on mode and the cruise control

Probably put the car in limp mode. I'm honestly not sure how to tell if it's tuned other than just straight up tuning it again. Which might actually work... Do you have smog laws in Dubai? Maybe you can just tune it, and turn off those codes. Not sure on the misfire though

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[02maher]

Originally Posted by Ashikabi

Probably put the car in limp mode. I'm honestly not sure how to tell if it's tuned other than just straight up tuning it again. Which might actually work... Do you have smog laws in Dubai? Maybe you can just tune it, and turn off those codes. Not sure on the misfire though

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Not for that, the law here is tough against engine modifications though

Can Tactrix do this? I heard it’s the cheapest tuning tool

[Ashikabi]

Originally Posted by 02maher

Not for that, the law here is tough against engine modifications though



Can Tactrix do this? I heard it’s the cheapest tuning tool

I've seen the name but I'm not familiar with it. Open Flash Tablet and ECUtek are the ones I know

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[Ashikabi]

Originally Posted by kevinbear

Wow that's great information post you have made some nice stuff provide i really impressed this blog such a useful for me
Christmas Coat

What the fuck did I just read?

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[Tcoat]

Originally Posted by Ashikabi

What the fuck did I just read?

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Spam Reported

[Ashikabi]

Originally Posted by Tcoat

Spam Reported

Someone should tell them that no one is that eloquent or courteous on a car forum. That's what gave them away lol

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[Tcoat]

Originally Posted by Ashikabi

Someone should tell them that no one is that eloquent or courteous on a car forum. That's what gave them away lol

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Ya really!
I reported 5 spammers this morning. All were very eloquent in their writing.
Some very classy bots indeed.