eZ Navi Delete Project

scope22 · 04-28-2019, 09:21 AM

It was a while ago that i did this but all i had to do was add a pin to the connector, no splicing into harness

Quote:

Originally Posted by radensb

You are half correct.

Yes - there is a way to delete the OEM Navi which was accomplished by swapping out the CAN based AC Amp and replacing it with a base model AC Amp. (which I know you know about because I am familiar with the work you and others have contributed to and done in this area

)

No - the because the above method requires you to add pin connections to existing harnesses to make the connections needed for the base model AC Amp, splice into existing wiring harnesses, and run new wire to the ECU and fuse box.

This solution is designed to be a plug-n-play adapter to the stock wiring harnesses of a Navi based car, maintain CAN Bus AC status and control, and open options for AC control/status on custom apps. A base model AC dial control module can connect directly to this interface, or control can be received from an app in "Tesla" style conversions that remove all physical controls. I am trying to make it as universal as possible and expandable to support future custom build ideas that are linked to the CAN Bus.

In fact, I was planning on pairing this with the Joying 9.7" Android HU, which I see someone is attempting right now!!!! EXCELLENT!

DIY: 9.7 inch Vertical Android Head unit install (Picture Heavy)

Really interested to see how their install ends up! I was thinking of going with the horizontal version (better UI IMO) but I really like to see how it actually fits.

radensb · 04-29-2019, 12:44 AM

Quote:

Originally Posted by scope22

It was a while ago that i did this but all i had to do was add a pin to the connector, no splicing into harness

From the current Navi Delete thread I posted that involved swapping the CAN AC Amp and running new wire:

Quote:

5. You will need to wire:
Pin 5 of M67 to pin 6 of M66 (pin you added)
Pin 4 of M67 to pin 7 of M66 (pin you added)
Pin 1 of M67 to pin 20 of M66 (splice into wire)
Pin 6 of M67 to pin 19 of M66 (splice into wire)

6. Next you will need to wire for illumination:
Pin 2 of M67 to pin 3 of M256 (splice into wire)
Pin 3 of M67 to pin 4 of M256 (splice into wire)

These are things I wanted to avoid in addition to running new wire to the ECU and fuse block. A big part was also wanting to provide a way to integrate status/control into custom apps.

radensb · 05-27-2019, 06:48 PM

New PWA and current firmware are working (for the most part). I have a few bugs to work out with the timing and proper interpretation of the Mode form the CAN bus. Also, I have more work to do on the Bluetooth interface. There are things that need to be done on the app side as well that are being examined to complete that feature.

*please ignore all the blue test/debug wires headders...

Illumination in action:

Operation in action: (I dont have my debug screen available, but the changes in airflow can be heard)

Jetset · 07-21-2019, 12:11 PM

radensb, I love what you're doing. Fantastic work.
I'm wondering though, can the 3 Dials M67 4 & 5 connect directly to M72 6 & 8?
Or are they talking different languages?

radensb · 07-22-2019, 12:20 AM

Quote:

Originally Posted by Jetset

radensb, I love what you're doing. Fantastic work.
I'm wondering though, can the 3 Dials M67 4 & 5 connect directly to M72 6 & 8?
Or are they talking different languages?

Different languages and physical layers.

Pins 4 and 5 on the M67 are a completely different voltage signal and protocol than M72 pins 6 and 8. The dial module with M67 uses a RX and TX style of communication with a voltage reference lifted from ground (for noise immunity I imagine). This communication is directly with the AC Amp in base model cars.

The Navi stock controls on M72 operate on a secondary CAN bus (AV-Comm) with the Navi controls and touch screen interface. The Navi head unit has a CAN Bus hub that links the AV-Comm CAN bus with the main ECU CAN bus which is what the Navi based AC Amp (white box under head unit) is connected too. One set of CAN messages live on the AV-Comm CAN bus where certain ones that contain information about the state of the AC controls are translated into messages on the main ECU CAN Bus. This was needed to get the information about the AC system to the head unit so that it could be displayed for the user on the screen.

Jetset · 07-30-2019, 09:20 AM

Would it be possible to turn off the open driver's door beep under ACC mode with this project?
My previous 350Z had a spade lug in the steering column that you could pull to break the circuit. That was simple, CANBUS is a bit different.

radensb · 08-10-2019, 03:52 AM

Quote:

Originally Posted by Jetset

Would it be possible to turn off the open driver's door beep under ACC mode with this project?
My previous 350Z had a spade lug in the steering column that you could pull to break the circuit. That was simple, CANBUS is a bit different.

I know exactly what you mean... as someone who has spent hours sitting in the car testing this and other projects, I can confirm it is awful. I have never looked into how the signal propagates in the system. It may not be CAN related. The problem is that if it is, there is some device pushing CAN messages that define the state of the chime (on or off). If my device also tries to send that same message and it is different that the other device in the car sending that message, the receiving device will get confused and may throw a code. Think of it like this, two people talking to a third person in a room telling them if he should ask a girl out. One is saying "YES" over and over while the other one is saying "NO" over and over. What's the guy to do!?

05-27-2019, 06:48 PM	#3 (permalink)
radensb Base Member Join Date: Jan 2014 Location: California Posts: 165 Drives: 09 Nissan 370Z GM M6 Rep Power: 6723	Update - HW Test New PWA and current firmware are working (for the most part). I have a few bugs to work out with the timing and proper interpretation of the Mode form the CAN bus. Also, I have more work to do on the Bluetooth interface. There are things that need to be done on the app side as well that are being examined to complete that feature. please ignore all the blue test/debug wires headders... Illumination in action: Operation in action: (I dont have my debug screen available, but the changes in airflow can be heard) Asus_ and mlsully like this. Last edited by radensb; 05-27-2019 at 06:54 PM.*

07-21-2019, 12:11 PM	#4 (permalink)
Jetset Base Member Join Date: Dec 2018 Location: Australia Posts: 4 Drives: 18 370z SW M6 Rep Power: 8	radensb, I love what you're doing. Fantastic work. I'm wondering though, can the 3 Dials M67 4 & 5 connect directly to M72 6 & 8? Or are they talking different languages? radensb likes this.

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07-30-2019, 09:20 AM	#6 (permalink)
Jetset Base Member Join Date: Dec 2018 Location: Australia Posts: 4 Drives: 18 370z SW M6 Rep Power: 8	Would it be possible to turn off the open driver's door beep under ACC mode with this project? My previous 350Z had a spade lug in the steering column that you could pull to break the circuit. That was simple, CANBUS is a bit different.