AEM Wideband showing no data

[Oms]

Hi All,

Ive connected an aem wideband cand double checked the wiring but the ecu will not see it, is there something im missing, map and logs included. tst205x 3sgte. Thanks in advence

PC Datalog - 2023-05-3 4;41;16 pm.llgx OP map upped fuel.pclx

[koracing]

Can you take a photo of how you connected the wiring?

Under Lambda 1 in the Analog inputs you should select "Link CAN" if you have the AEM X-Series wideband coming in on CAN bus.

[Vaughan]

2 hours ago, koracing said:

Under Lambda 1 in the Analog inputs you should select "Link CAN" if you have the AEM X-Series wideband coming in on CAN bus.

Absolutely do this, also check the AEM is transmitting as Lambda 1 if that doesn't fix it.

And I would recommend updating your firmware as you are using quite an old version.

[Oms]

 so im just rewiring it now ive gone green to green can L to can L and white (pin 4 on wideband gauge) to the brown on this plug. Will change to link can and run a log

It now starts and cuts straight away

[Oms]

Current log attached. starts and cuts, have i missed something here? firmware updated and lambda 1 set to link can, looks like its reading?

Thanks guys

PC Datalog - 2023-05-5 12;25;21 pm.llgx

[Adamw]

What do you mean by "starts and cuts"?  Are you talking about the AEM wideband still or some other issue?  Has it been tuned and running correctly before?

[koracing]

It may help if you set your fuel pump output to turn on (Aux 7 output).  The circuit opening relay will turn the pump on while cranking or if it sees the start signal, but the ecu has to tell it to stay on after the starter disengages.

[Oms]

Hi it was the engine that cut, worked fine before ive put it down to a wiring fault on the ageing Toyota plugs. i dont suppose there is a good supplier of these anyone can point me in the direction of?  Thank you both for your assistance

[koracing]

Toyota sells many of the plugs separately if you can get the part number off of the connector - usually starting with 90980-#####.  That said, what connector specifically are you seeing as faulty?  Did you correct the fuel pump output setting?

[essb00]

Try to see here if they've got the connectors/plugs you need.
https://www.nzefi.com/products/wiring-and-connectors/connectors/toyota-vehicle-specific-connectors/

[Oms]

 

On 5/9/2023 at 5:20 PM, koracing said:

Toyota sells many of the plugs separately if you can get the part number off of the connector - usually starting with 90980-#####.  That said, what connector specifically are you seeing as faulty?  Did you correct the fuel pump output setting?

The ECU Header plugs one of the 040/070 plugs is a little loose. I couldnt get them from toyota uk as apparently they do not sell them? ive managed to source them elsewhere so will remake the loom. ive not altered the setting just yet as soon as i remake the plug/harness ill update.  Is there any issues with using 0.75mm sq or 1mmsq  for all the conductors? ive got acess to 3gkw cable which is a better grade than avss but am unsure as to if therewill be resistance issues

[Adamw]

0.75 or 1.0mm would be ok for the main power supplies and grounds/070 terminals, for all the signal wires you would probably be better with 0.5mm.  The gkw wire is also very large insulation diameter so check it is going to fit into the connectors before you commit, most automotive connectors are designed for very thin wall insulation.  You will want shielded wire for the triggers and knock sensor also. 

[Oms]

Thank you