anyway to check codes on 1jz converted car? (JZZ30 Donor engine)

[Z2TT]

Hi,

Have a motor ecu and wiring here from a jzz30 that will be going into another car. Now i remember with the JZA70 ECU, it has a output wire to connect to the CEL.

The jzz30 seems to be different, Have been comparing the jza70 and jzz30 ecu pinouts, and see that the jzz30 ecu has no such wire from the ECU to connect to the CEL (for counting flashes). No idea how the errors are checked on the z30, whether the ecu communicates to the dash somehow.

Am wondering is there anyway I can be able to check error codes with a z30 1jz in another car?

On the jza70 ecu, the pin labelled "W" is the CEL wire, I cant find this pin on the jzz30 pinouts.

Thanks.

[triptek]

W pin is located right next to the M-REL pin on the jzx90/jzz30 ecu's.

[wilbo666]

As said, there is a W pin



Cheers
Wilbo

[Z2TT]

I must be blind.

Thanks guys, so error codes can be checked as normal just like on the JZA70? bridging the pins on the diag con and hooking up a Light to the W Pin and reading the flashes?

Was under impression that with jzz30 you actually got Japanese writing displayed.

[wilbo666]

I must be blind.

Thanks guys, so error codes can be checked as normal just like on the JZA70? bridging the pins on the diag con and hooking up a Light to the W Pin and reading the flashes?

Was under impression that with jzz30 you actually got Japanese writing displayed.

Sure can, just like normal.

I'm not too up on the JZZ30's but I imagine that the W pin also goes to the dash then that could be the case. But the normal W pin and Light will work fine

Cheers
Wilbo

[Z2TT]

Thanks,

Could anybody confirm? As I thought using the CEL to count flashes was an 80's thing.

[2jzhilux]

You can still do it on a 2010 toyota so id say you can on a 1990s one

[wilbo666]

Thanks,

Could anybody confirm? As I thought using the CEL to count flashes was an 80's thing.

Trust me.

W pin going to a Light and bridging TE1-E1 will work.
The 1JZ in my JZA61 was a JZZ30 engine / ECU and I did this many a time.


As said even the OBDII stuff has a flashing check engine light, well JZA80 (VVTi) and JZS161 that I have played with at least did

Cheers
Wilbo

[Z2TT]

Ok Thanks everybody

[George]

I would point out that you must manually check if the loom you have does route all the signals needed to DLC connectors. It is usual that some connections are run through body loom, and upon engine swapping you have to make appropriate connections manually. While TE1 and TE2 are not available then TC should be used instead.

[madmont]

I have wired in a switch to switch the TC pin in the OBD connector to earth . Tell me George are you able to link a laptop to your ECU through the OBD port for diagnosis and if so what software do you use?

[George]

I have a post-1998 1JZ so it uses OBD2. Physical interface is K-line (SIL pin on the ECU). I even have a k-line to serial port adapter which I used for reprogramming the ECU for my previous engine. But since the adapter is not opto-coupled I doubt to use it in a car.

As for the software, we do have here a number of obd2-related projects, I've downloaded one that lists post-1998 jzx100 among tested vehicles but haven't tried it yet. It's freeware so I could post it here, however keep in mind it's a beta and it's not translated to English.

If you have a spare ECU ;-) I would give you a simple k-line adapter schematic so you could check the connection at home, and if the software works in general then I'll think of translating it somehow. A k-line adapter itself is easily tested with some terminal software, for example one that comes with any Windows system. If everything is ok then after estabilishing serial connection to it you type some characters and see them displayed in the terminal window as incoming stream.

[madmont]

I have a 2001 JDM 1JZ which has the OBD2 socket but being JDM is not OBD2 compliant the best I have done so far is extract error codes using the MIL lamp. I would not mind trying the freeware you mentioned to see if works at all with mine

[George]

ok, download everything listed at the bottom of the 1st message here
http://pccar.ru/showthread.php?t=11362

unzip/unrar the "jobd" archive to some folder, then put the content of "profiles[71]" archive to "ecu" folder of "jobd" software

try to run the software at home first. Figure out what you don't understand, I'll check out this forum and answer everything in 9 hours

[madmont]

Thank you George I will have to get the hardware probably take me a couple of weeks to set up and try.Will get back to you then

[Z2TT]

Well George wouldn't the TE1 and TE2 avaliable on the diag connector in the engine bay which should be attached to the 1jz loom? So would I just bridge the appropriate terminals and watch the CEL flash away? No need for DLC Connectors?

[George]

No need for DLC Connectors?

Absolutely not, you may just use some piece of wire to connect TE or TC to gnd and then enjoy blinking light. Only make sure first that those terminals are connected to corresponding ECU connector pins.

However OBD2 interface, where available, can provide you with some extra info.

[wilbo666]

Well George wouldn't the TE1 and TE2 avaliable on the diag connector in the engine bay which should be attached to the 1jz loom? So would I just bridge the appropriate terminals and watch the CEL flash away? No need for DLC Connectors?

Madmont and George are talking about OBDII stuff which might be confusing you


For OBDI you connect TE1 to E1 to get codes to flash out the Check Engine Light.

For OBDII you connect Tc to E1 to get codes to flash out the Check Engine Light.


Cheers
Wilbo

[Z2TT]

Thanks,

I assume the Twin Turbo 1jz's are all OBD1, so all a case of just using the under bonnet plug that is part of the ECU Loom, i wont have a problem then.

For OBD2, where are the TC and E1 pins located? in the same area like under the bonnet on the diag con, or are these in the dash somewhere?

Thanks.

[George]

For obd2 vehicles these pins are located in dlc1 connector under hood. For a converted car, the TC pin is most likely not connected to the ECU.

Also for converted vehicles there won't be a diag connector somewhere in the dash unless you buy and install it ) For other vehicles you will find the TC and E1 pins in the dash diag connector as well.