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I have a Link WRXLink WRX6X and am trying to interface with an AEM X-SERIES UEGO over CAN-BUS.
What I'm seeing is the Lambda value flickering between 0 (the error value) and full lean (some high value because the car is off).
My best guess is a wiring issue but the crimps look good (I removed the heat-shirk to re-check), resistance confirmed good, and continuity test passes no problem. The cable is built out of the AEM pigtail and a pigtail for the JST XAF CAN connector on the ECU.
As a work around, I've wired the analog ground and output and retained power from the CAN port which is working no problem.
Picture for fun:
Attached Files
Snapinst.app_482502496_18269721283255079_4619444406622459806_n_1080.jpg
Attach a log and a copy of your tune.
Thanks Adam, I will definitely get you a log! I've battling a coolant leak near the turbo which is slowing down my progress haha.
I'm not sure if this datalog actually captured any sporadic Lambda readings - I may need to double check that this tune had the correct CAN setup and try again to capture a log.
Attached Files
CANBUS-PC-Datalog-2025-03-16-52459-pm.zip
Lambda is not working at all in that log and the reason is you have the Lambda 1 control set to a CAN AN. It should be set to "Link CAN" in this case as your CAN stream is set up to write to the Lambda 1 runtime.
Attached Files
- PCLink_2025-03-20_10-58-28.png
