Page 1 of 1

Hellen 121 Nissan hellen121nissan

Posted: Fri Feb 05, 2021 12:30 am
by AndreyB
We now have a 121 pin ECU for Nissan VQ engine like the one on my daily

https://rusefi.com/s/hellen121nissan/

https://github.com/rusefi/rusefi/wiki/Hellen-121-Nissan

https://github.com/rusefi/rusefi/wiki/Nissan-Xterra-2011

Something like 350Z might benefit from this, no idea what year range uses similar ECU if any. No idea if 4 cylinder Nissan is compatible or not.

Image

https://docs.google.com/spreadsheets/d/1mhGITGrEsXB65xr1dcxLFLKIrD0TVu754hoxm6RZHCA

Re: Hellen 121 Nissan

Posted: Fri Feb 05, 2021 3:01 am
by AndreyB
Well, time to ask Nissan people if they know their CAN messages
image.png
image.png (169.81 KiB) Viewed 14118 times

Re: Hellen 121 Nissan

Posted: Fri Feb 05, 2021 6:20 am
by mck1117
Well that's quite handy

Re: Hellen 121 Nissan

Posted: Fri Feb 05, 2021 4:10 pm
by AndreyB
Well, time to revive my old thread https://my350z.com/forum/tuning/590412-nissan-canbus-messages.html

Looks like the challenge here would be not hardware but making automatic transmission CAN-happy?

https://github.com/jackm/carhack/blob/master/nissan.md has too little and my 2014 messages do not match any of the three sources of Nissan CAN data. Also TIL "DBC file" maybe one day rusEFI would read DBC files from SD card :)

https://github.com/rusefi/rusefi/issues/2278 to add packet filtering into rusEFI CAN sniffer

Re: Hellen 121 Nissan hellen121nissan

Posted: Tue Feb 23, 2021 12:04 am
by AndreyB

Re: Hellen 121 Nissan hellen121nissan

Posted: Mon Apr 19, 2021 11:03 pm
by AndreyB
Step 1: remove fluid bottle neck...
image.png
image.png (2.47 MiB) Viewed 13688 times

Re: Hellen 121 Nissan hellen121nissan

Posted: Mon May 03, 2021 9:51 pm
by AndreyB

Re: Hellen 121 Nissan hellen121nissan

Posted: Sat May 15, 2021 3:44 am
by waynem88
Putting my hand up to test these, when available. (I messaged the page on FB and was pointed here)

Re: Hellen 121 Nissan hellen121nissan

Posted: Wed May 19, 2021 6:11 am
by AndreyB
Getting closer
image.png
image.png (148.47 KiB) Viewed 13106 times

Re: Hellen 121 Nissan hellen121nissan

Posted: Wed May 19, 2021 6:14 am
by mck1117
Why not dual wideband? These engines have two upstream O2 sensors.

Re: Hellen 121 Nissan hellen121nissan

Posted: Wed May 19, 2021 6:20 am
by AndreyB
mck1117 wrote:
Wed May 19, 2021 6:14 am
Why not dual wideband? These engines have two upstream O2 sensors.
image.png
image.png (43.12 KiB) Viewed 13105 times
Fair point issue created

Re: Hellen 121 Nissan hellen121nissan

Posted: Wed May 19, 2021 6:23 am
by mck1117
Which means we need some way to set index when we have multiple controllers permanently connected. The current index set mechanism requires disconnection of all the controllers whose index you don't want to set.

Re: Hellen 121 Nissan hellen121nissan

Posted: Thu May 20, 2021 10:14 pm
by AndreyB
Also first Hellen board with dual WBO
image.png
image.png (244.27 KiB) Viewed 13060 times

Re: Hellen 121 Nissan hellen121nissan

Posted: Wed Jun 30, 2021 9:09 pm
by AndreyB
We have blue blinking from external +12 volts :)

I forgot about the v8 engine in the Pathfinder, I bet it uses same pinout.

Re: Hellen 121 Nissan

Posted: Thu Jul 01, 2021 3:14 am
by pk386
AndreyB wrote:
Fri Feb 05, 2021 3:01 am
Well, time to ask Nissan people if they know their CAN messages

image.png
I might know a guy. ;)
How do you plan on dealing with NATS (Nissan Anti Theft system).

the ECM and BCM are paired.

Re: Hellen 121 Nissan

Posted: Thu Jul 01, 2021 3:32 am
by AndreyB
pk386 wrote:
Thu Jul 01, 2021 3:14 am
the ECM and BCM are paired.
Please keep talking :) Are you saying BCM would not authorize cranking until ECU authenticates? Well, worst case scenario I might end up keeping OEM ECU on the CAN bus for the cranking phase.

For my purposes I am happy to wire up the starter relay in any funny non OEM way.
image.png
image.png (42.33 KiB) Viewed 12410 times
image.png
image.png (128.29 KiB) Viewed 12410 times

Re: Hellen 121 Nissan hellen121nissan

Posted: Thu Jul 01, 2021 9:39 am
by Fonzie
"The starter motor plunger closes..." I doubt it can according to the schematic!

Re: Hellen 121 Nissan hellen121nissan

Posted: Fri Jul 02, 2021 4:21 am
by AndreyB
Progress
trigger_58.png
trigger_58.png (33.1 KiB) Viewed 12363 times
trigger_59.png
trigger_59.png (24.97 KiB) Viewed 12363 times

Re: Hellen 121 Nissan hellen121nissan

Posted: Wed Aug 11, 2021 10:20 pm
by AndreyB
Pavel @Mad Rat got me in touch with a 2003 and 2004 Nissan Almera owner - 1.5 and 1.8 engines

We've compared VIGN, injector and crank/cam pins, match! Time to drive a vehicle on Hellen Nissan!

Got pedal sensor calibrated, things are amazing!

Second step ETB motor - there is some buzzing but no movement. I forgot to solder pin #3 and forgot to implement ETB relay control - FSIO to rescue, we got ETB movement!!!

But got a very weird https://github.com/rusefi/rusefi/issues/3137 error and started tracing things with digital multimeter.

That's where things went down. TPS input pins were shifted by one position on Almera. While touching things Pavel has burned his finger on coil control module on Hellen. That's where we found a relay on where we were expecting coil #1.

Good think we have a lot of 0R on the board :) With four 0R removed we got TPS to show something reasonable, and coil module is no longer hot to touch! We even clicked 3 injectors (due to chip shortage boards farbictated with 6 not 8 mosfets - would need to move on), and 2 coils (todo).

No RPM. Signal pins match expectation but Altima has crank/cam GND going into ECU while Xterra has crank/cam GND in vehicle harness.

Wait, one of the crank/cam Almera GND pins has a legit usage on Xterra!

More 0R removal more jumpers, we got RPM.

So we are at six mismatched pins, will continue after some fixes to the board and settings.

Almera wiring diagram mentioned on https://github.com/rusefi/hellen121nissan-issues/issues/13

Re: Hellen 121 Nissan hellen121nissan

Posted: Thu Aug 12, 2021 3:54 pm
by AndreyB

Re: Hellen 121 Nissan hellen121nissan

Posted: Thu Sep 09, 2021 11:31 pm
by AndreyB
AndreyB wrote:
Wed Aug 11, 2021 10:20 pm
Almera wiring diagram mentioned on https://github.com/rusefi/hellen121nissan-issues/issues/13
Nissan Micra N12 "with euro ODB" seems to be the same thing https://github.com/rusefi/rusefi_documentation/blob/master/OEM-Docs/Nissan/nissan-micra-n12-with-euro-obd.pdf

Re: Hellen 121 Nissan hellen121nissan

Posted: Mon Sep 19, 2022 11:22 pm
by AndreyB

Re: Hellen 121 Nissan hellen121nissan

Posted: Fri Mar 24, 2023 2:24 pm
by AndreyB
From https://www.facebook.com/groups/rusEfi/posts/1662988990802404/

red line on the graph is with the pnp ecu with no maf (274whp) and the other graph is stock ecu (257whp)

Magic tune https://rusefi.com/online/view.php?msq=1431