If you need trouble shoot with the key in the on position, just unplug the timing harness from the eManage. Then reconnect it when you are ready to start the engine.

If you have an eManage properly wired, than you just need the EU supplemental harness which makes upgrading to the EU very easy.

 

Sharif,

On what basis are you making that statement? I ask because even without the diodes, which may or not be providing any protection as evidenced by Overzealous, I ran for several months with the Emanage without frying any coils.

Have you been electronically measuring the signal out put of the EU??

 

The basis of the statement is Greddy Japan and Greddy USA. They have measure the signal output, and confirmed it will not harm the coils. You will recall, that when the blue ignition harness was avail, Greddy immediately advised people NOT to install them on the VQ35. Of course, we figured out the diode trick, and the rest is history. Greddy is pretty conservative on saying whether on not something will work. If they arent absolutely certain, they will just say "I dont know".

When I get a chance, I will put a multimeter on the output wires and check it for you.

 

You have pm.

 

Once I receive my Emanage Ultimate, John, from J&S, will come by with his o-scope to verify as well. If the circuits are different in the ultimate, like it seems that they are, there should be no issues running the EU with the Safeguard. John and his O-scope will be able to 100% verify that the diodes are not necessary

 

i already tested it. line in from ecu= 0.01-2v line out from emanage before diode 0.67v average after diode at coil= 0.54v average

let me know if you get something different on yours.

 

Was there an update to this?

 

Not yet. I have been busy. I just got my Innovate gauge hooked up and I am looking into the data logging with the EU. It has taken most of my spare time. I will PM John and see when he may be available to come by with his O-scope and check things out.

 

Please do...if anyone can figure it out...it will be John.

 

my post up above was with the emanage blue. the eu outputs 0.06v now, with 0.01-0.02v coming in from the ecu. seems low enough to not turn the coils on now, but i still managed to burn up a coil. think a couple others have also. either the crank just stopped in a firing position and caused it, or the eu still sends out too much voltage at ignition on nonmotor running condition. i have just gotten used to pulling the ignition harness now to test stuff.

 

so this burned coil was done while leaving the key in the on position for extended lengths of time? how long? thx

 

it really wasn't even for very long at all. don't remember exactly but it was less than a few minutes. i'm guessing the diodes would drop it enough now at this point with the eu though. but like i said i was getting outputs of only 0.06v so i thought for sure it wasn't enough to turn them on. i'm almost thinking maybe the motor stopped at a position where the crank pos. sensor was saying "fire". but hard to do as the piston would have been under compression and almost never will the motor stop at that highest compression. who the hell knows, hahahha

 

The ECU turns off the coils if the crankshaft is not turning.

If the emanage shuts off the coils during a stall condition, and they still blow, then it means there is still current "leaking" out of the emanage.

Originally, we used NPN transistors, with pullup resistors. The emanage also uses this configuration. They changed ignition driver chips in the new emanage, but that chip still contains NPN's, connected to external pullup resistors.

We changed to P channel MOSFETs a year ago, and haven't lost any coils since.