CAN gauge

[Boostjunky]

Hello,

I recently hooked up a CAN gauge to my Kpro v4. All the wiring is correct with appropriate resistor and all to the CAN Hi and CAN Low. I get the gauge to speak with the ECU once I reload the tune. When I turn the ignition back off then back on, it shows 0 in all the values I have on the gauge until I reload the tune again and then the values are displayed appropriately again. This will continue indefinitely. I also have the CAN enabled in kmanager and also have them speaking to each other at the same mbps. Any insight on what's causing this issue?

[Spunkster]

What is the serial number that is on the K-Pro board?

What is the version of software you are using from Help, About?

Where are you getting power and ground for this gauge?

[Boostjunky]

1) Serial number: 57572

2) Version: 4.5.9.0 Build 3803

3) Power is tied into either terminal 2 or 3 on the A plug going to the ECU (IGP1 or IGP2)...I can't remember which one. Ground is ran directly to the chassis.

[Spunkster]

Try using a power source from the under-dash fuse box that is switched when the ignition is on but does not turn off when cranking. There should be a space that will accommodate a spade connector for this.

[Boostjunky]

Ok, I will try that and report back with any issues. Thank you for the help.

[Boostjunky]

Ok, so I have not tried what you suggested yet, but wanted to throw some other information out there to see if your suggestion stays the same. I am using a hybrid racing cabin harness for my swap...99-00. I just wrapped up the tune. Opened kmanager to make sure all the readiness monitors were ok. Well, only 1 had acceptable status. Drive the car for about 10 min, they are read as they should. Shut the car off and back on, same thing...only 1 reads acceptable. Drive the car for 10 min again, all read acceptable.

So I stumbled across an article online about someone who did a swap in an MR2, and had the same issue. He, however, was using a bone stock ECU. He came to the conclusion that the ECU wasn't powering down properly therefore not saving the monitor status which caused them to reset every time. I couldn't but help think this could also be causing the issue with the CAN gauge since every time I reload the tune, the gauge reads the values from the ECU. Shut the car off and turn back on, it won't read values unless I reload the tune.

Could these 2 issues be linked together? Could this be the reason why both my readiness monitors reset AND why my CAN gauge resets its active status?

The guy said that in order to test this theory, test with a multimeter E7 with ignition on and off and E9 with ignition on and off. Well, I did this. E9 with ignition off was 0 volts. Ignition on was 12 volts. E7 however was only getting .777 volts when ignition was turned on and 0 when ignition was off. I should be getting 12 volts when ignition is on to E7 correct? Possible solutions or cause of this issue? Thanks in advance!

[Spunkster]

This definitely needs to be fixed as it sounds like it is not wired correctly.

[Boostjunky]

I would assume you would recommend I contact hybrid racing regarding this matter? It's a plug and play harness that completely replaces the stock E plug. I have not changed any wiring and I am using a stock rsx type s engine harness...for what it matters so I'm pretty confident there shouldn't be any issues there.

[Spunkster]

Definitely contact the manufacturer of the harness.

[Boostjunky]

What gets me is that the car still runs and drives as it should. Shouldn't I be receiving a 12v signal to E7 when ign is on? How can the car run and drive fine when I'm not getting 12v to that pin when ign is on?

[Boostjunky]

Update:

So I pretty much knew this was gonna happen...they claim since the cabin harness only takes signal received from the ECU and sends it through the E plug, that the issue may be ECU related. We spent 30 min going through things and they are stumped because it seems everything was done properly. My tuner, which is well known from coast to coast and has done development work with some big names, confirmed everything from a running motor wise standpoint is operating as it should. So I'm at a loss. Can you provide any further assistance?

Am I able to send the ECU to you guys to ensure everything is working as it should? Is there any technical support you guys could offer via zoom or teams? ANYTHING to help solve this issue?

[Spunkster]

You should try our ECU in another vehicle and see if it is properly powered. If it does, then you know you need look at your wiring further.

[Boostjunky]

Unfortunately I do not have access to another vehicle to try this technique out. I need to do it the old fashion way with a multimeter.

I have gotten the ECU to remember and shut down properly. The harness did not include a power source when ign was off to E7 pin. All seems to be well there now...

...now back to the gauge. I need to confirm that the CAN portion of the ECU is operating the way it should be. As stated before, when I go and turn engine on, it doesn't want to register any live data. As soon as I reload the tune (whether car is running or just in aux power), everything works as it should and live data is visible on the gauge. When the car is shut off and then turned back on, it won't register live data until tune is reloaded. Why is the gauge not staying connected to the ECU when ign is turned off so it recognizes it when the car is powered back up again? Gauge manufacturer claims, through testing with me, that the gauge is working properly, so that's why I'm here trying to make sure the ECU is working as it should.