2ZZ Swap Harness - Toyota MR2 Spyder - Part II

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• MR2 Spyder for Dummies
Part I of this series is here:
• 2zz Swap Harness - Toy...
Swapping a 2zz-ge engine into a Toyota MR2 Spyder requires modification of the ECU wiring. This can be done with a specially made patch harness, available for purchase from Monkeywrench Racing, and shown in a previous video, or, as an alternative, by re-pinning the ECU connectors. This video outlines the required changes for re-pinning the harness terminals to achieve the same result as the MWR swap harness. A future video will show exactly how to perform these changes. The chart referenced in the video can be found here:
drive.google.c...

[@l0rd-z851]

Thank you Frank, the diagram really helped me resoder some pins that got broken at a previous mechanic on the MWR adapter.

[@Merryfrankster_]

Glad to be of help. Basically this wiring schematic IS the MWR swap harness. LOL.

[@sixer48]

Keep them coming Frank 👍 Swapping over a few wires is a good option for most that can’t afford the expensive swap harness

[@Merryfrankster_]

I'm trying to keep it simple so anyone can do it. As you know the charts and tables that people publish can be confusing and intimidating for the average Joe.

[@millll111lllI]

Thank you for making this video!

[@Merryfrankster_]

Thanks for watching.

[@ae92guy16]

Thank you!...I'm ae92guy ... swapping 2zz to ae92 on yt and these vids are helpful....!

[@Merryfrankster_]

Thank you for watching and for commenting.

[@damonleeb]

Should you cut or completely remove the handful of wires out of connectors that are not needed?

[@Merryfrankster_]

You can remove unused wires, make sure you refer to the correct wiring diagrams.

[@damonleeb]

@@Merryfrankster_ after the swap I have no spark. I have confirmed proper ground points to the transmission, 14mm bolt vvt solenoid filter to firewall, and 2 grounds to ocv above the radiator hose. Any other grounds I should be worried about to check? Thanks for the help

[@Merryfrankster_]

@@damonleeb No spark could mean blown EFI fuse, or IG fuse, or problem with immobilizer if you are using a immobilizer ECU. Hook up to your ECU with scantool, and verify you have a crankshaft position signal while you crank - rpm on scantool should be about 250 while you crank. If there is no rpm signal you could have a problem with the crankshaft position sensor or its wiring.

[@jhordyarispe756]

Very good video but I have a question I have a celica 2002 1zz automatic and I bought a 2zz engine complete with harness and ecu but it is mechanical. I just want to change the engine and leave my automatic box what modification do I have to do if my 2zz engine has everything in the wiring harness and the ecu

[@Merryfrankster_]

You need the ECU from an A/T 2zz model and the axles may be different between A/T and M/T. You also need the A/T flexplate for the 2zz.

[@jasonmarcisaacs1150]

I have the 2zz harness ...i want to know must i still swap the the wires ..the orange wire and the green wire

[@Merryfrankster_]

2zz harness not gonna work in a mr2 Spyder. You do you.

[@jasonmarcisaacs1150]

Sorry boss I'm from South Africa I have a toyota runx needed info

[@abbaldwin6451]

The jdm ecus also work with the 2zz in the spyder.

[@jimchance5006]

Not emissions legal though.

[@rafikannabi]

Hi :) i swapped a 2zz with the his original harness on a corolla 2007 which had a 1zz engine now with the 1zz ECU the car is not starting (i did nothing on the wiring) please where do i start?

[@Merryfrankster_]

Sorry, I don't know.

[@neishalorraine2086]

I have a matrix 2005 1zz, can I swap a 2zz engine using 1zz harness with 2zz ecu and do rewire the connectors? Send me more information about it.

[@Merryfrankster_]

Your car has a harness for a drive-by-wire throttle body aka electronic Throttle Control System (ETCS), and the 2zz has a cable throttle body. You would have to re-wire this. You will also need to install a cable throttle pedal.

[@Arielxx01]

What happens if I wire lift + instead of lift - ? Which one is + and which is - ?

[@Merryfrankster_]

It does not matter. The OCV is a solenoid and will operate either way. Going by the service manual, if you face the connector, pin 1 is on the right and goes to the OVL+ on the ECM.

[@cadenlawhorn6975]

Does this wiring also apply for the 2002 ecu? 89666-20190?

[@Merryfrankster_]

Not sure. At some point they switched to drive-by-wire throttle body, that has different wiring. I would have to go look it up.

[@cadenlawhorn6975]

@ but if the 2002 was drive by cable then it should still be the same?

[@luisalbertoalarconflores5292]

Buenas me puedes brindar coneccion para el obd e 2zz-GE

[@Merryfrankster_]

Thank you for watching.

[@jameelali3709]

Thank god I found this video great work btw, I have a 03 corolla and planning on swapping a jdm 2zzge which comes with harness and ecu. Only thing I’m confused about is wiring, so would this b the same for doing that swap? Or more wiring needs to b moved around?

[@Merryfrankster_]

The wiring for the Corolla will definitely be different from the MR2. You will need to refer to a complete pinout for the Corolla. Look for the section titled "Terminals of the ECM" in the Corolla repair manual.

[@jameelali3709]

Frank Saab thanks for the reply, from what I’ve read the corolla body harness doesn’t fit like in yur video so I’d have to get pigtails and rewrite the body connector? Most likely a pigtail from a celica correct?

[@Merryfrankster_]

@@jameelali3709 I would suggest that you use a patch harness like one of these instead of hacking up your harness. www.wiringspecialties.com/1jzgte-vvti-etcsi-ecu-patch-harness/ www.autosportwiring.com/toyota.htm

[@jameelali3709]

Frank Saab yea I wouldn’t mind getting that if it was plug n play but doesn’t some wires still have to move around? I was thinking no cutting just get a harness plug for the 2zzge and depin the body harness into that, like what u showed in the video but it would b a lot more than just a couple wires lol

[@noorkhaleel4449]

Please help I have power fc 2zz mr2 spyder. Are those the only wiring I need to do? It's not starting on PFC but it start on the stock 1zz ecu

[@Merryfrankster_]

If it starts on the stock 1zz ecu, then it should start on the powerFC. What modifications have been done to the car?

[@elhuachedesalgueromichuaca5697]

Hello, I have a question, I bought a 2zz engine from a 2001 celica. Can I use the same computer from a 2001 celica 1zz?

[@Merryfrankster_]

Celica 1zz computer cannot control a 2zz. You need a celica 2zz computer.

[@elhuachedesalgueromichuaca5697]

good video I have a question, the connectors of a 2zz ecu are the same as those of a 1zz

[@Merryfrankster_]

This is a broad question. It depends on the year and model of the vehicle with the 1zz or 2zz. ECU connectors for many Toyota vehicles changed in 2003, from 3-row to 4-row. @@elhuachedesalgueromichuaca5697

[@elhuachedesalgueromichuaca5697]

2001 celica 2zz and 2001 celica 1zz both standard transmission

[@Merryfrankster_]

the connectors are the same but there are three extra wires for the lift solenoid and sensor on 2zz. @@elhuachedesalgueromichuaca5697

[@alejandr0031]

HELP! Was wondering if you could help me out. I recently swapped a 2zz into my dads mr2. The engine we bought came out of an already swapped mr2 spyder so really thw wiering was done on the engine side but we had to move wires to the body side (from what the gent who sold it to us told us). He cut his body harness and left it plugged into the ecu for us to aee exactly what needed to be moved and we did. Unfortunately now the car cranks but wont start. Seems none of the coils are fiering. Any thoughts on what we could have missed? Thanks!

[@Merryfrankster_]

When you do the harness for the swap, there is just a few wires that are moved from one of the engine harness connector to go into the body harness connector. These do not affect the firing of the ignition coils - they just affect the O2 sensor. So this is not the issue preventing your car from starting. Check the fuses in the engine compartment, speciically the EFI fuse will prevent the car from starting. Does the check engine light come on when you turn the key in the ignition? It should light up briefly, then go off. If it does not, this means the ECU is not getting power. Try plug in your original 1zz ECU. Will the car start with it? Do you have a scantool? Does it show an RPM signal while you crank? It should be about 250rpm.

[@alejandr0031]

@@Merryfrankster_ thank you so much for the help. I will be looking into all that hopefully tomorrow.

[@wella8169]

Great video, just one question...the body harness that goes to ecu will control the dash etc of the mr2 spyder? The key then needs to be re coded?

[@Merryfrankster_]

First part of your question yes the body harness connects the ECU to the dash and other body functions like radiator, a/c control, et cetera. Fortunately the Celica ECU's pinouts are compatible with the Spyder body harness pinouts. Second part, regarding the key, in general for a 2zz swap you will use a USDM or JDM Celica ECU that does not have a immobilizer function. So you don't even need a transponder key. HOWEVER - if you choose to use a EU or UK 2zz Celica ECU, I believe those have a immobilizer function. You will have to follow the standard process for reset (or "virginize") the ECU then pair it with your existing transponder key(s). If you have any questions on how to go about this then let me know

[@wella8169]

@@Merryfrankster_ thats great, so the celica 2zz ecu will let everything in the car function, so i just need to follow your steps for lift etc as in the video...sorry thats what i was trying to ask

[@wella8169]

But i will be using the toyota runx/t-sport 2zz ecu, hopefully that works

[@Merryfrankster_]

@@wella8169need to check whether runx edu has immobilizer function.

[@MultiKtiger]

@@Merryfrankster_ i personally would love to know how to go about reseting the ecu to pait with existing transponder

[@LSmiata]

GREAT Vid's, We are not all dumbmies, but I do have some questions. In your custom wiring, are you addressing the TPS pin-out? It is reversed from Celica GTS 2zz to MR-2/S 1zz. Does MWR swap kit address this issue? I should ask them as I did buy the kit. Thank you again, I just completely rebuilt an 01 Celica drop-out bolt for bolt for MR2/S swap (and LSD - Toyota Torsen type) Mr .P

[@Merryfrankster_]

The TPS wire swap has to be done at the TPS connector. It cannot be done at the ECU. So the the swap kit cannot address to issue. You have to address it with your engine harness. The TPS connector has three wires. You leave the yellow wire alone. You swap the other two (purple and brown). I've shot a how-to for it, but it had lighting issues, so I have to re-do it. Stay tuned.

[@LSmiata]

Hello@@Merryfrankster_, Thank you for the response. I truly appreciate persons like yourself that share knowledge over the internet. I did confirm, as you stated above, that the TPS pin-out does need changed, even with the "plug-n-play" system. What I do not understand is why this could not be performed at the MWR wiring extension that connects to the PCM and BCM? I would like to see the detailed pin-out on the control module but have not yet found. How does the OBD-II system know the throttle position if it is not an input? I do not believe this sensor is on a CANBUS or interact with any other modules on the wireharness..........but if I am in error, please advise. NOTE: I worked as an automotive wiring engineer for several years and as such am VERY familiar with wiring, pin-out, connector systems, and control on automotive systems. Thank you again for your time and response, and I look forward to future posts. Mr. P

[@LSmiata]

Think more......... Ground (upper wire) no issue. Bottom two are 5v ref and signal. Can understand that wiring harness not capable b/c 5v ref is shared, but signal wire is specific. Thanks again......sometimes it take looking and thinking to understand and solve issue. Mr. P

[@jalilsalmon288]

Hey I just did a swap and it isn’t starting, do I need to do the repin to start even if I use both 1zz and 2zz ecus?

[@Merryfrankster_]

What exactly did you swap. SMT?

[@Merryfrankster_]

This re-pin does not affect the starter and ignition circuits in any way. But if you have swapped from SMT to M/T there is a circuit related to the starting that you must modify.

[@jalilsalmon288]

Both M/T

[@Merryfrankster_]

@@jalilsalmon288 In that case it is probably something fairly basic like one of the ground wires not connected to the transmission, block, or battery. You need the ground to complete the starting circuit and make the starter crank.

[@elhuachedesalgueromichuaca5697]

I have the 2zz harness

[@Merryfrankster_]

Thank you for watching and for commenting.

[@zero_to_1000]

What do you do with all the depinned grey ones?

[@Merryfrankster_]

They are not even there.

[@zero_to_1000]

@@Merryfrankster_ oldest comment ever lol. Built the car tracked it and sold it already.

[@Merryfrankster_]

@@zero_to_1000 I am just foing the time warp again today.

[@zero_to_1000]

@@Merryfrankster_ lol

[@BUILDNIGHT]

Hi Frank! Any chance I can reach you by email or something to ask you a few questions? THANKS! glenn

[@olivevideogames]

I have a 03' Matrix XRS (2zz-ge) and i am planning on swapping everything into a spyder. Can I use the ECU from the matrix? It is a factory 2zz-ge M/T as well so i can't see why not, but I cant find any info on anyone else using that particular ECU. Thanks.

[@Merryfrankster_]

Yes you can use the Matrix ECU. HOWEVER, it will take a lot more re-wiring work that the Celica ECU, which requires only a handful of wires to be changed. If you want to get the pinouts for the Matrix ECU you can find them on the Toyota Technical Information System (TIS), look for the section of the repair manual titled "Terminals of the ECM." Also I believe in general the Matrix ECUs have a higher lift engagement RPM and a lower rev limit.

[@olivevideogames]

@@Merryfrankster_ awesome, thank you for the info! I'm comfortable with wiring so it shouldn't be a problem.

[@Merryfrankster_]

@@olivevideogames you will need to study carefully what to do with a/c, radiator fans, P/S, and instrument cluster.

[@jimchance5006]

Did you figure out how to swap the matrix ecu in? I'm in the same predicament now.

[@olivevideogames]

@@jimchance5006 From what I can tell it seems like you can, its just the celica ecu is preferred as a result of its higher rpm range. Also, I spoke to a local guy who swapped his 2zz matrix engine into his spyder and he let me know he had to end up using a celica intake manifold due to the orientation of the matrix intake manifold being slightly different.

[@lounguyen1129]

I need help in installing the engine wiring harness for the 2zz swap. Can any1 help me?

[@Merryfrankster_]

Look for instructions on spyderchat.com.