2JZGTE Wiring Harness Made Easy
#138
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I bought 2jzgte for my car but I am confused with the ecu because in ecu there is no part number but the ecu look same as 2jzgte vvti only denso part number is giving "part number of ECU is DENSO 9717520-068-7 12V" is't same or not. If its same then weather it has immobilize or not.
thanks
thanks
#139
Pole Position
iTrader: (20)
I haven't done any research into this idea, but I assume some of you have read the GTE ECU conversion on the stock 2JZ-GE, which allows use of the stock coil packs etc.
https://www.clublexus.com/forums/sc-...t-ecu-mod.html
Could one simply take the stock GE harness, re-pin it for for the GTE ECU, add the few extra sensors and ignition system and be good to go?
Therefore eliminating the need to extend and merge the two harnesses together.
https://www.clublexus.com/forums/sc-...t-ecu-mod.html
Could one simply take the stock GE harness, re-pin it for for the GTE ECU, add the few extra sensors and ignition system and be good to go?
Therefore eliminating the need to extend and merge the two harnesses together.
#140
I bought 2jzgte for my car but I am confused with the ecu because in ecu there is no part number but the ecu look same as 2jzgte vvti only denso part number is giving "part number of ECU is DENSO 9717520-068-7 12V" is't same or not. If its same then weather it has immobilize or not.
thanks
thanks
I haven't done any research into this idea, but I assume some of you have read the GTE ECU conversion on the stock 2JZ-GE, which allows use of the stock coil packs etc.
https://www.clublexus.com/forums/sc-...t-ecu-mod.html
Could one simply take the stock GE harness, re-pin it for for the GTE ECU, add the few extra sensors and ignition system and be good to go?
Therefore eliminating the need to extend and merge the two harnesses together.
https://www.clublexus.com/forums/sc-...t-ecu-mod.html
Could one simply take the stock GE harness, re-pin it for for the GTE ECU, add the few extra sensors and ignition system and be good to go?
Therefore eliminating the need to extend and merge the two harnesses together.
Doing a GTE harness.. there are different ways going about it... you can take the aristo GTE as your base to start with since it has basically everything you need for a GTE swap . You can also start with the GE harness , but there are a lot more wires / connectors to be added.
You just have to see what is easier , faster and less confusing route for you. Bottom line, at the end of the day that harness should work for your swap.
#141
Pole Position
iTrader: (20)
^Thanks for that info, I'm sure I'll do many more GTE swaps in the future in other cars. My car doesn't have a body harness and all I have to do is provide power to the ignition and ECU, for pretty much any motor. LS1 is in almost complete.
My friend does JZ wiring harness daily. I was thinking it could potentially save him time, for someone that has done many harnesses. Or if a person didn't have a harness with their GTE motor they wouldn't have to buy two harnesses. Another benefit is buying all new connectors versus using the old harness plugs, which are normally brittle and broken anyways. Then run new wire to the new connectors. Could also stock many GE harnesses and whip them out faster, theoretically.
Those are all assumptions of course, it may end up being easier and more cost effective to merge the two. Especially for someone who is doing only one harness and buys a JDM motorset with everything.
Thanks for all the documentation and information!
EDIT: Spoke to my friend and he said he found a place that sells the oem wire terminals, so running new wire, connectors and wire terminals, would eliminate soldering pretty much.
My friend does JZ wiring harness daily. I was thinking it could potentially save him time, for someone that has done many harnesses. Or if a person didn't have a harness with their GTE motor they wouldn't have to buy two harnesses. Another benefit is buying all new connectors versus using the old harness plugs, which are normally brittle and broken anyways. Then run new wire to the new connectors. Could also stock many GE harnesses and whip them out faster, theoretically.
Those are all assumptions of course, it may end up being easier and more cost effective to merge the two. Especially for someone who is doing only one harness and buys a JDM motorset with everything.
Thanks for all the documentation and information!
EDIT: Spoke to my friend and he said he found a place that sells the oem wire terminals, so running new wire, connectors and wire terminals, would eliminate soldering pretty much.
Last edited by fried_rice; 07-13-14 at 11:37 AM.
#142
Driver School Candidate
Join Date: Jun 2004
Location: Texas
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GREAT write-up!!!!
I have a SC300 harness (I think) that I am going to convert to 2JZ-GTE. I will have to move some pins around but am having a bit of difficulty finding the ECU pinouts. I have the SC400 daigram and it doesn't match my connector's pins. For instance, the E9 connector has pins 5 & 6 empty, but these are the CAM/Crank position sensor signals needed for the TT (OBDII) ECU). Shows them populated/used in the SC400 diagram I have :-/
So, I am going to depin/repin the signals into the right places at the ECU and add signals not already in the non-turbo harness. Can you please point me to a simple "accurate" ECU pinout for the SC300 (maybe with VVTi/OBDII)? Yep, I've been searching. TIA
I have a SC300 harness (I think) that I am going to convert to 2JZ-GTE. I will have to move some pins around but am having a bit of difficulty finding the ECU pinouts. I have the SC400 daigram and it doesn't match my connector's pins. For instance, the E9 connector has pins 5 & 6 empty, but these are the CAM/Crank position sensor signals needed for the TT (OBDII) ECU). Shows them populated/used in the SC400 diagram I have :-/
So, I am going to depin/repin the signals into the right places at the ECU and add signals not already in the non-turbo harness. Can you please point me to a simple "accurate" ECU pinout for the SC300 (maybe with VVTi/OBDII)? Yep, I've been searching. TIA
#143
GREAT write-up!!!!
I have a SC300 harness (I think) that I am going to convert to 2JZ-GTE. I will have to move some pins around but am having a bit of difficulty finding the ECU pinouts. I have the SC400 daigram and it doesn't match my connector's pins. For instance, the E9 connector has pins 5 & 6 empty, but these are the CAM/Crank position sensor signals needed for the TT (OBDII) ECU). Shows them populated/used in the SC400 diagram I have :-/
So, I am going to depin/repin the signals into the right places at the ECU and add signals not already in the non-turbo harness. Can you please point me to a simple "accurate" ECU pinout for the SC300 (maybe with VVTi/OBDII)? Yep, I've been searching. TIA
I have a SC300 harness (I think) that I am going to convert to 2JZ-GTE. I will have to move some pins around but am having a bit of difficulty finding the ECU pinouts. I have the SC400 daigram and it doesn't match my connector's pins. For instance, the E9 connector has pins 5 & 6 empty, but these are the CAM/Crank position sensor signals needed for the TT (OBDII) ECU). Shows them populated/used in the SC400 diagram I have :-/
So, I am going to depin/repin the signals into the right places at the ECU and add signals not already in the non-turbo harness. Can you please point me to a simple "accurate" ECU pinout for the SC300 (maybe with VVTi/OBDII)? Yep, I've been searching. TIA
Do you have a VVTi or Non VVTI engine ? There is a difference in wiring. This writeup will cater more to the NON VVTI though there will be similarities too.
#144
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Join Date: Jun 2004
Location: Texas
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LOL... I am so dumb. I started by looking at the SC400 diagram, which is in a diff. format. When I saw the diagram in post #69, I just assumed I'd seen it a thousand times before (for the Supra 2JZ-GE & GTE) and not the SC300 one for my harness. :-/
But yeah, basically trying to asses what I have, remove the unnecessary pins/signals, add/reuse the right circuits for 2JZ-GTE (non-VVTi) and install into MKIII Supra. I have a couple of "donor" harnesses if I need extra pins/wires and extra new connectors on hand (coilpacks, CPSs, etc).
I've extended/used JDM Aristo harnesses before, but since the length on this is already very good... worth a try.
The write up really helps with the crazy-sanity checks we go thru... even when we've done this before. Thanks again!!
But yeah, basically trying to asses what I have, remove the unnecessary pins/signals, add/reuse the right circuits for 2JZ-GTE (non-VVTi) and install into MKIII Supra. I have a couple of "donor" harnesses if I need extra pins/wires and extra new connectors on hand (coilpacks, CPSs, etc).
I've extended/used JDM Aristo harnesses before, but since the length on this is already very good... worth a try.
The write up really helps with the crazy-sanity checks we go thru... even when we've done this before. Thanks again!!
#146
Lexus Champion
iTrader: (10)
pins 5 6 and 7 are a special cam/crank ground in the both the ge/gte ecu and they are connected together inside ecu.
normally the GE has 1 shared ground for cam/crank on 7.
normally the GTE has 2 cam grounds 5 and 6, and 1 crank ground on 7.
If you use a GE harness on a GTE you do not need to run separate ground wires for 5 and 6.
you can just tie all 3 cam and crank ground wires into the 1 ground wire at distributor which goes to 7. 5 and 6 remain empty.
normally the GE has 1 shared ground for cam/crank on 7.
normally the GTE has 2 cam grounds 5 and 6, and 1 crank ground on 7.
If you use a GE harness on a GTE you do not need to run separate ground wires for 5 and 6.
you can just tie all 3 cam and crank ground wires into the 1 ground wire at distributor which goes to 7. 5 and 6 remain empty.
#147
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Join Date: Jun 2004
Location: Texas
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pins 5 6 and 7 are a special cam/crank ground in the both the ge/gte ecu and they are connected together inside ecu.
normally the GE has 1 shared ground for cam/crank on 7.
normally the GTE has 2 cam grounds 5 and 6, and 1 crank ground on 7.
If you use a GE harness on a GTE you do not need to run separate ground wires for 5 and 6.
you can just tie all 3 cam and crank ground wires into the 1 ground wire at distributor which goes to 7. 5 and 6 remain empty.
normally the GE has 1 shared ground for cam/crank on 7.
normally the GTE has 2 cam grounds 5 and 6, and 1 crank ground on 7.
If you use a GE harness on a GTE you do not need to run separate ground wires for 5 and 6.
you can just tie all 3 cam and crank ground wires into the 1 ground wire at distributor which goes to 7. 5 and 6 remain empty.
#148
To help those doing a 2jzgte VVT-i Swap on their SCs ...
Wiring Harness Write up for a 2jzgte VVT-i swap on a Lexus SC will be on my Build Thread Starting page -> 227 Post 3398 . This thread will be left just for the Non-VVTi 2jzgte swaps
https://www.clublexus.com/forums/bui...ml#post9286606
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Wiring Harness Write up for a 2jzgte VVT-i swap on a Lexus SC will be on my Build Thread Starting page -> 227 Post 3398 . This thread will be left just for the Non-VVTi 2jzgte swaps
https://www.clublexus.com/forums/bui...ml#post9286606
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Last edited by gerrb; 12-14-15 at 11:08 AM.
#149
...You have to use the right size of shrink wrap too and you don't need electrical tape as long as you don't puncture that shrink wrap that shields your solder point and prevent wires from being exposed. That is exactly why you shrink wrap solder points... to cover them. So when you are soldering and joining wires , make sure you dont have sharp areas or wires protruding. You also make sure that the shrink wrap is well heated and secured that it doesn't slide out...
I concur with all your wiring harness tips and recommendations; however, I have one suggestion for anyone overhauling a harness. Buy an industrial grade ratcheting wire crimper, wire stripper, butt connectors, and shrink wrap. It's superior to soldering, takes a fraction of the time, and produces a more reliable connection.
Here's a pic of my harness tools:
Here's a sample of a breakout connector I added to my harness:
Thanks,
-scott
Last edited by motorheaddown; 12-21-15 at 03:45 PM.