R32 gtr rb26 Can lambda logging issue

[greddy32]

Hey guys I sent the attached log to my tuner, he said he doesn't see wideband on the log at all 😑 can someone have a look  at the log, im not sure if its a configuration issue or wiring issue. While driving i see a reading on my laptop so im confused. It goes to his shop on Friday so I gotta figure this out before hand. 

Thank you!

new cruz.llg

[Vaughan]

Lambda 1 shows as zero for that entire log, what wideband controller do you have and how is it wired to the ECU?

[greddy32]

Link can lambda wired per the manual using the link pnp can harness 

[Vaughan]

Have you setup the CAN communication in your basemap? can you attach a copy of your tune please

[greddy32]

Wallewein UMS Dyno 2.pclr

[Vaughan]

It looks like it is setup correctly in that tune and I can see in the runtimes in that tune that it is reading statuses from the sensor where your log had no statuses showing which leads me to believe that that tune you sent is different to the one that was in it when you took the log, take another log with that tune in the ECU please.

[greddy32]

Okay will do, idk how that happened. I'll have to do it tomorrow 

[greddy32]

the forum isnt letting me upload the log it says its too big...

[Vaughan]

upload to google drive, one drive or some other website that stores files and share a link to it here, forum only has a small amount of data space per person.

[greddy32]

https://drive.google.com/file/d/1XupG3pfS-9RErKidsL58cSSaDH5aVOE6/view?usp=sharing

coming out of the can lambda umit i have roughly 5v is that the correct voltage?

[Vaughan]

That log shows CAN 1 bus as being passive with none of the Lambda 1 runtimes having been set so you have a wiring issue. How have you wired the power to the CAN Lambda unit? The CAN wires coming out of the CAN Lambda are a digital signal not an analog voltage so it isn't really possible to see exactly what is going on with a multimeter but that sounds like a bus with no messages on it. How did you measure the output voltage of the CAN Lambda and which wires were you checking?

[greddy32]

its wired per the manual and im using the link can connector to connect the ecu to the can unit. with key on engine off i got 12v coming out on pin 4 and 5v out on pin 1

length is only about 2ft it that matters

[Vaughan]

Can we get some pictures of how everything is wired together

 

You should have 12V on pin 1 if you are using the Deutsch connector looms and this should be measured between Pin 2 (Ground) and pin 1 (power).

[greddy32]

https://drive.google.com/file/d/1P2aqD2_kJncn-CypAPWNqXfAky2MTQH9/view?usp=sharing

 

what pics would you like? the relay is wired per the manual ive checked it like 100 times lol should i wire the relay like i would for a fuel pump?

i have 12 v on those pins you pictured i was measuring at the big plug on the can unit that plugs into the o2 sensor 12v on pin 4 and 5v on pin 1 (referencing the can lambda module manual)

https://drive.google.com/file/d/1YNM4PCjWdYIIugnyQPHLsC53qIHAXxYQ/view?usp=sharing

[Vaughan]

Where are the power supply and ignition switch wires going into the relay coming from?

Can you check the power and ground going into the CAN Lambda while the engine is running without unplugging it and can you confirm if the Lambda 1 statuses change to values other than the ones shown in this image.

Basically what I was seeing in your logs is no communication at any point from the CAN Lambda and the CAN bus being in error due to nothing connected to the ECU on the CAN bus.

If all those Lambda 1 statuses are staying off then the ECU isn't receiving any messages from the CAN Lambda and if the ECU CAN 1 is showing errors in the CAN 1 Status runtimes then it means there is physically something wrong with the CAN bus like nothing connected to the ECU CAN or wires shorting out or something.

[greddy32]

unplugged is 12v plugged in is 2.5

[Vaughan]

If the power to the can lambda goes from 12v to 2.5v when you plug it in that suggests you have a bad power supply, maybe try running the CAN Lambda power and ground wires directly to the battery as a temporary measure to see if that gives you lambda readings and if it does then investigate your power supply setup.

[greddy32]

while taking the reading i think i touched ch and cl together by accident..... it went to 2v after that... probably f****d the unit up im guessing. i have a very short window of opportunity between watching my kid and messing with my car i think rushing around may have bit me in the ass this time

[Vaughan]

CAN High and CAN Low touching each shouldn't damage anything, unsure if putting 12V into CAN H or CAN L would damage anything.

Also don't care what the reading on CAN H and CAN L is, only care about voltage between the power and ground wires at this point.

[greddy32]

ok baby i down for the night, unfortunatly i cant start the car until the morning... i looked and it seems that all i did was pop the fuse so were good sorta i retested with the car not running everything plugged in... i tested 2 ways, and got 12v with ground to chassis and 0v with ground to pin 2

7 minutes ago, Vaughan said:

CAN High and CAN Low touching each shouldn't damage anything, unsure if putting 12V into CAN H or CAN L would damage anything.

Also don't care what the reading on CAN H and CAN L is, only care about voltage between the power and ground wires at this point.

my bad not ch cl power and ground

[Adamw]

5 hours ago, greddy32 said:

i tested 2 ways, and got 12v with ground to chassis and 0v with ground to pin 2

This doesnt sound right if Im understanding what you are trying to say?  Pin 2 is ground, so you should get the same 12V reading on Pin 1 whether your ground probe is connected to chassis or to pin 2.  

[greddy32]

I did get 12v actually, I needed to move the probe around a little bit to make better contact 

[greddy32]

the can unit was plugged into the wrong can port on the ecu....... im an absolute idiot. heres a quick log of it running

can working.llg

[Vaughan]

Yup that log shows a proper Lambda signal

[greddy32]

hey can you have a look at this. seems as if my lambda signal drops out from time to time

 

https://drive.google.com/file/d/1EZcgeFUem6Hac6M_tJR1XggzibiKRBYs/view?usp=sharing