Step5:PMU Configure Outputs- Enabled Power using a DZ-Start Push Button Ignition

Working through your example it shows setup of Enabled power through CAN Bus and and CAN Button, I'm struggling to work out the function for Enabled Power if one used a traditional key barrel ignition or (in my case a push button which has replaced the ignition barrel using the existing wiring) , I don't want to use CAN as a start option for my current setup .

Do you have some examples or notes how to set this up?

Thanks

Tony

I just replied to your other thread and possibly got the wrong end of the stick. If you're trying to replicate the power enable keypad button with your ignition barrel then this can be done by wiring the 'run' position from the barrel to an analogue input and setting that up in the same manner that Zac has set up the CAN keypad function.

I don't have an example of this but I'm happy to help further if you have more questions.

Hi Andre , thanks so much for jumping in I did see your response on the other post -thank you! I have copied your response here below for my reference as I believe this post is more pertinent and I was quite vague in the other post:

Hi Tony, sorry I'm not completely clear what you mean? If you're referring to using the ignition barrel to trigger the PMU to run the starter motor then that's relatively straight forward. You'd just need to find the output from the barrel that goes to 12V in the crank position and wire that to a digital input on the PMU. From here you'd need to configure the PMU to recognise a high state on this input as 'ON'. Once you have that being recognised by the PMU you can program an output to operate the starter motor.

You could also add a CAN input from a keypad or similar to function the starter if desired and have the option to use either the key or a start button. You'd need to add some logic around a timer for the starter output so it doesn't crank indefinitely. I usually set up a max time of say 5 seconds and then have an rpm input that will disable the output once rpm exceeds say 500 rpm.

Hi Andre,

I have attached a pdf of the aftermarket DZ Start pushbutton that I installed on my 280z some 7 years ago , I'm busy doing the ground work in how to configure this existing unit in my car with my soon to be installed LINK G4+ and Ecumaster PMU with a Blink 8 button keypad after the RB NEO transplant .(I don't want to use a CAN button to start the car as shown in the course),when I do the RB Neo transplant in a couple of months .

On reading the DZ Start Button install manual 12v+ positive(BROWN) is received from Brake Pedal depressed and (PURPLE) requires a tacho/Coil Signal , and is currently connected to the Negative of the coil , in this current setup with the factory L28 series engine.

I have reached to to Datsun Dave from the States (he built and sold these units back then) to confirm if and how this unit will work with individual coil pack low voltage system vs the single coil/distributor setup?( While drafting this Dave responded saying all it needs is + - +- +- signal Any 1 of the coil packs should give the pulse needed. It just needs to see a + - + - + - signal. I think you can even get that from an injector as well.)

The notes on page 4 of the install manual state the purple wire needs to be connected to a positive or negative "pulsed" signal.

My thinking/understanding is for the existing DZ Start button to work with the new RB engine set up, I could configure a free aux output on the Link ECU to "Tacho" and this will output a square wave signal for DZ Start button to receive , if this works then my plan is to the use the DZ Start button to trigger the PMU as you have stated above? Let me know if this sounds feasible?

My OEM wiring diagram and testing the circuits shows red/white is 12v+ from the battery when START button off , then 12v + when START button ACC on and 12v when cranking/started. The blue/red wire is 12v only when START button ACC on and goes to zero volt while cranking and then 12v once started , so I'm assuming to use the blue/red ?

If yes , then I will wire the Blue/red into analog input on the PMU , looking at ECUMASTER PMU there are only Analog inputs available , and I see the software changes it to a digital and then configure the PMU to recognise a high state "ON" and then program the output for the starter motor.

Let me know if I have got this all right or if you require any additional info before commenting.

As always thanks for assistance in these forums , appreciate the time take to respond to my questions

Tony

This seems to be well and truly overcomplicated given the addition of a PMU. I can't see an y good reason why you can't do away with the DZ module entirely and simply work out which pins in the start button provide continuity when depressed. Then these can be wired to the PMU and you can add any other functionality through PMU functions (like a hidden anti-start switch, the crank time I already mentioned and the disengagement when the engine starts).

From what you've described I'd asy you ahve the correct wire with the blue/red.

Hi Andre,

Thanks for suggestion on removing the DZ module, sounds like an excellent plan to me, it will definitely free up some realestate under the driver's console. Have ordered a new Nissan Almera Start Button (this is what the DZ Module uses) and will continue down the road suggested .

Thanks again for your valued input!!