Seems like the computer is turned off at 7volts on 12v, don't remember a long ago post I read I think someone posted the ICE on occurs around HVB 30% and off at 40%. If computer was turned off when you put jump starter on you will have to wait for the computer to boot up and load it's data (2-3 minutes??) Possibly before it could close the relays???
As I recall, when jumping the hybrid, it is not turning over a starter motor. It is establishing 12 volt circuitry to operate the hvb, which then can operate the motor if needed to start the ice, and all other hvb operations.
Quite correct, but this was in answer to someone asking about a jump box that COULD start a conventional ICE engine. Thread drift to be sure. I believe from seeing quite a few posts here that most any of the jump boxes will be capable of starting the hybrid since as you say it only needs to power the computers and relays. But if you want a capable jump box that can start an ICE engine take a look at the NOCO line, recommended.
Thank you for the detailed reply. Appreciate your efforts to help me out. I looked over the Amazon offerings and spent a couple hours looking at the many YouTube reviews of some of the most common jump starters out there. I finally settled on getting the Hulkman 8.5 from WalMart. I have an RV with a 6.8 liter V10 and where that NOCO GB40 had some trouble starting a smaller V8, the Hulkman had no issues. A bit cheaper as well. Definitely, my second choice would have been the NOCO.Amazon does carry the full NOCO line. Just type NOCO into Amazon. It's quite a list.
Mine is a GB40 something. It's an older model but they still have a similar one listed as GB40. It's listed as 1,000 amps. My son got it for me for Christmas at least 8 years ago. I have used it to power our tablet / credit card reader at craft shows for years, works great. And then you can jump start the car when you are ready to leave the craft show. Which I have actually done twice.
I also have a NOCO battery charger / conditioner on my motorhome. The leads are wired solid to the battery and it disconnects from those with a quick disconnect. Also has the regular sawtooth grips so can be used elsewhere as a charger. I don't have the model on that but I think it is part of their Genius line.
Here is the attachment accessory. I like it because I'm not grinding up the battery posts on the E450 when I put the charger on. I leave the charger on it on when we are not using it.
Amazon.com: NOCO GC002 X-Connect M6 Eyelet Terminal Accessory for NOCO Genius Smart Battery Chargers : Automotive
I noticed that the new genius 10 is on sale on Amazon 20% off so it's 99.67. of course you will need so quick disconnects, storage box. Etc so you can double that pretty quick. But the capabilities are impressive.
There's a YouTube where a mechanic is not replacing the harness but he is fixing that connection that failed. Instead of soldering that stranded cable to that plate he crimped a connector on the cable and bolted it to the plate. Much better. It looked like it was easy to inspect that connection. Perhaps that soldered connection failed again?
disconnect the negative side of the battery and jump it with the POS and directly to the fram somewhere?
Why? It's well established that the 12V battery is NOT used for starting, only for "activating" the relays that allow the HVB to start the ICE.
Not who you were responding to, but it sounds like one 12V battery would be reserved solely to power up the powertrain (which doesn't take much and doesn't need much in terms of CCA as the eCVT pulls from the HVB to start the ICE, both at rest and in motion).
I don't know the minimum voltage required for my lithium jump pack but it does have a "boost" setting which sounds like the bypass procedure (which I did not have to use to wake the relays). That said, I also tried jumping with a 1700 amp lead acid (judging by the weight) jump pack courtesy of the parking garage and via another running vehicle's 12V battery. All 3 methods yielded the same result, vehicle awakened but would not "start" i.e. go into "ready" mode.
Reverted to the 99R probably because it's shorter and mav was designed for it to fit under seat. I'm thinking adding a second 99R might be an option. But then would have to balance them periodically. The booster will put out many more amps than a battery. Ford is most likely working on a solution.
