Honda Electrical Load Detection (ELD) Bypass
#41
03-21-2012, 06:25 AM
Join Date: Dec 2009
Location: Quad Cities, IL
Posts: 3,279
A battery bank is required for high power systems, and you are still stuck with lower voltage. Multiple alternator setups are preferred.
#42
03-21-2012, 11:42 AM
And if it wasnt hot most of the time here I would have already replaced the compressor with a second alt.
#44
03-21-2012, 11:47 AM
5,000 watts needs way more than 270 amps
If you have all class D amps which run around 80% efficiency
5000 watts / 14 volts / 80% = 446 amps plus the car needs around 40 amps
You need around a 500 Amp alternator to run a 5K system.
Even though it is slightly off topic what equipment are you running that draws 5,000?
Also most if not all high output alts made by the big guys like Mechaman or DC Power have the ELD bypassed already.
What alt are you running and what subs do you have that handle 5,000 watts?
If you have all class D amps which run around 80% efficiency
5000 watts / 14 volts / 80% = 446 amps plus the car needs around 40 amps
You need around a 500 Amp alternator to run a 5K system.
Even though it is slightly off topic what equipment are you running that draws 5,000?
Also most if not all high output alts made by the big guys like Mechaman or DC Power have the ELD bypassed already.
What alt are you running and what subs do you have that handle 5,000 watts?
I know all of the basic math behind it, but you also dont "need" a 500 amp alt. Thats why have I have a bank of D3100s. But Ive tried mechman and it wasnt too good for my car, Now I have DC but i still only charge at 13.8 and deal with the alt shutting off.
and btw it will be a 13k setup by the summer, but next year I will be moving it to a tahoe with 4 alts. Ill pm you with the system details to not clutter up the thread.
#46
03-24-2012, 12:42 AM
Join Date: Dec 2009
Location: Quad Cities, IL
Posts: 3,279
How do you know it is shutting off and you don't have voltage drop or are drawing more than the alt is providing?
The ECM still has control over the alternator field current. Leaving the ELD plug disconnected doesn't give the ECM the low voltage it wants to see to keep the field current on, but it does see 0 volts on the sense wire, which isn't what it expects.
The ECM still has control over the alternator field current. Leaving the ELD plug disconnected doesn't give the ECM the low voltage it wants to see to keep the field current on, but it does see 0 volts on the sense wire, which isn't what it expects.
#47
03-24-2012, 05:29 AM
How do you know it is shutting off and you don't have voltage drop or are drawing more than the alt is providing?
The ECM still has control over the alternator field current. Leaving the ELD plug disconnected doesn't give the ECM the low voltage it wants to see to keep the field current on, but it does see 0 volts on the sense wire, which isn't what it expects.
The ECM still has control over the alternator field current. Leaving the ELD plug disconnected doesn't give the ECM the low voltage it wants to see to keep the field current on, but it does see 0 volts on the sense wire, which isn't what it expects.
I know its shutting off because my voltage drops with no load on the alt besides just the car running. and I can feel the difference in the engine from the alt on and off.
#48
03-24-2012, 09:10 AM
Join Date: Dec 2009
Location: Quad Cities, IL
Posts: 3,279
You sure it isn't the A/C compressor you can feel turning on/off? Have you tried using a resistor in the ELD plug? What does the voltage drop from/to?
For my benefit, start from the beginning. what all have you done? New alt and unplugged the ELD?
For my benefit, start from the beginning. what all have you done? New alt and unplugged the ELD?
#49
03-24-2012, 09:54 AM
Join Date: Dec 2009
Location: Quad Cities, IL
Posts: 3,279
From a service manual:
ECM Fail-safe Function:
When an abnormality occurs in a signal from a sensor, the ECM ignores that signal and assumes a pre-programmed value for that sensor that allows the engine to run.
Unplugging the ELD may result in the ECM ignoring it.
ECM Fail-safe Function:
When an abnormality occurs in a signal from a sensor, the ECM ignores that signal and assumes a pre-programmed value for that sensor that allows the engine to run.
Unplugging the ELD may result in the ECM ignoring it.
#50
04-14-2012, 09:42 PM
hello, I'm just wondering if this work also in a civic 7th gen? i have the Civic ex '01 and i identified the ELD in the fuse box. just wondering if this would work for me as well?
i've been trying to find a solution for my sound system but couldn't find anything that could actually help until now.
i've been trying to find a solution for my sound system but couldn't find anything that could actually help until now.