Part 1
I don't know if I should laugh or cry. I can see why "Fake News" is word of the year in 2017 and still is today.
Each and every one of you need to back to school and learn "Ohm's Law and Kirchhoff's Circuit Laws (KCL)"
The next course taken is "How a CAN Network Operates".
One more time:
The posted advice is ..................................
Absolutely incorrect and NOT advisable - PERIOD!
Read the last entry and get educated.
https://forscan.org/forum/viewtopic.php?f=4&t=22115
Been there, done that, wrote books about it, have all the "T" shirts.
Battery chargers are garbage, a floating power supply is the only correct method.
Have any of you even considered testing a parasitic draw just with the ignition turned ON?
My guess is NO!
Try it, it's not difficult and a step forward towards learning some of "Ohm's Law and Kirchhoff's Circuit Laws (KCL)"
Instead of posting this nonsense, get one of these tools and LOOK AT IT!
- UNI-T AC_DC.jpg (125.97 KiB) Viewed 2355 times
KOEO - Attach the clamp and test the parasite at the negative cable first.
KOEO - Attach an AMP clamp to that mickey mouse POS battery charger, what is the current output?
Answer - Less than the parasitic draw.
One way or another, the system will fail and force it self to sleep. Worst case, "Another Brick In The Wall".
One more time, a POWER SUPPLY is recommended, NOT a battery charger.
The one that I use is a 90 AMP floating power supply and can remain attached all year long with NO damage to the system.
Part 2
The network, how is it kept alive during diagnosis and maintaining electrical stability?
1) A proper and clean output power supply
2) A functioning quality scan tool - active within the network.
3a) Network wake up - added electrical loads such as 4-Way Emergency Flashers.
3b) This simple test will keep a network active providing number 1) is correct.
4) When stable, all electrical consumers should be turned off according to any flash or update instructions.
5) The truth holds during a diagnostic session, unwanted consumers should be in the OFF position.
Without the driver intervention, some networks will "wake up" from time to time to "self check" and perform maintenance.
There are also common instances when the network will NOT enter sleep more AFTER the key was removed because:
A) the engine is HOT
B) the PCM and fuel pump remain ON
C) the fuel pressure / temperature and pump is monitored until the potential of a vapor lock is eliminated (cooled).
D) this is common with - GDI or direct injection vehicles.
So imagine, programming a PCM in that condition? - "Another Brick In The Wall".
During any and all diagnostic sessions, programming sessions, voltage and current are closely monitored and never trashed or bricked a controller.
The earth is still round last time it was calculated by the Ancient Greeks.
magatards are an evolutionary mistake - only time and evolution will take care of that mistake.
E = I X R is perfection
Light travels 300,000,000 Meters in one second - still hasn't changed.
The speed of electricity or velocity factor is not the same as the speed of light.
The velocity factor can range between 50% to 95% dependent and on many factors.
thank you!