Hellen 121 Nissan hellen121nissan

[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.



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

[AndreyB]

Well, time to ask Nissan people if they know their CAN messages

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[mck1117]

Well that's quite handy

[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

[AndreyB]

2005 350z seems related https://raw.githubusercontent.com/wiki/rusefi/rusefi/OEM-Docs/Nissan/2005-350z-ecu.png but 2007 facelift https://raw.githubusercontent.com/wiki/rusefi/rusefi/OEM-Docs/Nissan/2007-350z-ecu.png used different ECU connector.

[AndreyB]

Step 1: remove fluid bottle neck...

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[AndreyB]

https://github.com/rusefi/rusefi/wiki/Hardware/Hellen/hellen121nissan-a-schematic.pdf is the current schematics draft

[waynem88]

Putting my hand up to test these, when available. (I messaged the page on FB and was pointed here)

[AndreyB]

Getting closer

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[mck1117]

Why not dual wideband? These engines have two upstream O2 sensors.

[AndreyB]

Why not dual wideband? These engines have two upstream O2 sensors.

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Fair point issue created

[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.

[AndreyB]

Also first Hellen board with dual WBO

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[AndreyB]

We have blue blinking from external +12 volts

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

[pk386]

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.

[AndreyB]

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.

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[Fonzie]

"The starter motor plunger closes..." I doubt it can according to the schematic!

[AndreyB]

Progress

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[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

[AndreyB]

https://rusefi.com/online/view.php?msq=615

[AndreyB]

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

[AndreyB]

Nick says https://github.com/icecube45/Dash_InfinitiG37/blob/master/InfinitiG37.dbc

[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