MakoHiko

HI, i recently got the unfortunate diagnosis that my ecm module is kaput on my jdm 2006 is350.
I was wondering if i could just swap a usdm ecm to replace it since i cannot find any jdm is350 ecms for sale, if so what would be the part number
any help would be greatly appreciated.

2013FSport

iTrader: (2)

Here are two sites you might look at.
https://jp-carparts.com/lexus/cartyp...us&type=242120

Or ******* dot com for some reason this place blocks that site. It does let you select different locations.

MakoHiko

unfortunately I'm not looking to spend 1700$ on an ecm, I was wondering if could just swap and reprogram an ecm from a usdm car and put it in a jdm car, thanks though.

2013FSport

iTrader: (2)

Was just trying to find you part number...

PM you the other site. For research purposes!

MakoHiko

Thank you so much!!!! I was able to find my is350 ecm part number!
I will finally br able to fix my car!

2013FSport

iTrader: (2)

Good to hear. Fingers crossed.

I looked mine up and was surprised to see it moves forward only, not backwards. It's a 2013 shows it's use as 2013 to 2015 in the 2IS, if ordered for $942, would come as 89661-53Q11

89661-53Q10 2013 Engine ECM PN

Jeff Lange

iTrader: (1)

Using a USDM ECM in a JDM car will likely result in a CEL unfortunately. JDM cars don't have the EVAP equipment required for the EVAP check to occur.

You can do the reverse (JDM ECU into USDM car), though it will also set codes for missing the battery current sensor (but not trip the CEL).

Jeff

MakoHiko

so what youre telling me is that i can swap an equivalent usdm ecm into my car and it will only trigger a harmless cel? if so **** yeah~!

2013FSport

iTrader: (2)

Hey Jeff, any chance you know what pins on ECM one could be looking at to send US ECM and *potentially keep it happy?
I'm guessing there is pump, and pressure information so no static input would satisfy the ECM. Does that sound about right? I could probably sketch up a timer circuit for startup and shut down.

Define harmless? Haha! Hopefully it doesn't criple car in some way.

MakoHiko

could the evap check not being able to happen cause some sort of issue other than a cel? Could a tune get rid of this issue?

2013FSport

iTrader: (2)

You'd have to ask. I mean its in a map somewhere among hundreds of others, the question is, has anyone bothered to find it?

As for function, we've seen O2 sensor disable VDIM and light up half the dash, so I honestly don't know the answer.

Thannp

I have a JDM is350 06 ECU but its a customed tuned with FBO parts and for E20 gas. If you are interested let me know

MakoHiko

Well, ****.

I got someone who specializes in ecu repair to check it out, and he says there's nothing wrong with it, and the poor voltage readings are due to the wiring harness loading up voltage, when it's not plugged into it, ecm gives 5v reading, when plugged in its a 1.2v reading, resistance is also super high as well compared to the other connectors (in kilo-ohm range instead of m-ohm)
Bastard mechanic shop didn't check it properly.
in summary.....

Good news:
-No jdm to usdm ecm horse**** to deal with.

Bad news:
-Faulty wiring horse**** to deal with.
-Finding someone competent ( and not outrageously expensive) to fix it.

I appreciate everyone's help on this matter as all of your inputs have been super valuable to me, once this is over i will finally be able to intall my ebay headers and downpipe.
(perhaps maybe even document it)
​​​​​p.s ( I hate car electrical, the parts cannon never works on it)