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Old 06-02-2019, 08:08 PM   #1 (permalink)
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Default 2006 mt ima not holding a charge

This just started. It is a very noticeable difference. The system is working much harder and charging much more aggressively. I’m hoping there is not a failed battery 🔋 stick or an internal short circuit?? Don’t have a grid charger yet, hoping that is all I need to fix this. I’m new to all this; it seems a grid charger is mandatory.
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Old 06-03-2019, 03:00 AM   #2 (permalink)
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Sounds like your pack is at minimum unbalanced. Any codes/IMA light? It's not that the pack 'isn't holding a charge'; it's that one of the monitored stick pairs is likely near empty while the others aren't. When that pair goes low, the car tries to charge aggressively, but since the others aren't as low, it can only charge so much without overcharging the others - so it stops charging. If it can't charge a minimum amount you get a P1449-78. As far as I can tell, at least in my car with the couple of BCMs I've tried, the car will do everything it can to charge at least 35% of total rated capacity (i.e. 2275mAh). For example, it will drop the charge current when at least one tap gets close to the charging voltage cutoff...
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Old 06-03-2019, 09:45 AM   #3 (permalink)
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Grid charger + Deep discharge will change your life.
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Old 06-03-2019, 01:18 PM   #4 (permalink)
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Quote:
Originally Posted by ADDvanced View Post
Grid charger + Deep discharge will change your life.
Not always, and for unmaintained batteries like his, frequently not. I don't think he gave us enough battery history to offer much constructive advice yet.

How old is the battery? Is it a Chinese replacement or is it an original Honda? Have the tap voltages(stick pairs) been measured? How often does it recalibrate? Does it set codes?

Stick pair measurement method:

https://www.insightcentral.net/forum...ml#post1061778
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Old 06-03-2019, 01:53 PM   #5 (permalink)
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One of my biggest problems, is in my area there are no Insight mechanics. I have limited free time to do much of my own maintenance. So i’m Not making as much progress, as time goes by as I would like. I’m new to this subject, but I have basic mechanical skills and experience. Thanks to everyone for their advice.
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Old 06-03-2019, 02:16 PM   #6 (permalink)
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Have not checked for codes this year. It’s going in for valve lash adjustment soon and will try to pull any codes. I do know this, something must have happened, with the previous owner. He took it to the Dealer twice for what looks like MPG issues, they just flushed the intake system and system diagnostics etc. I don’t think they could find any problems. I took it to a Foreign car Tech (no Insight experience) last Fall, they could not find a problem, but recommended valve lash adjustment.

Sometimes the IMA Battery goes down to 3 bars and doesn’t seem very “receptive “ to accepting a recharge. Other times it seems to take a charge in a normal manner.

This may seem anecdotal, but I have read about people who have had several G1s and once in awhile they get one that stands out from the others for max MPG and much easier for getting into lean burn. And it seems they can’t always figure out what the hang up was with the others. So far, for me getting to this place has been a very tall order! Also, when I drove it home from N Carolina the gas I got in Virginia (Sunoco) made a big difference in MPG and lean burning. Several questions and mysteries, but fewer answers for this newbie! Still got a few more things to check out.
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Old 06-03-2019, 04:01 PM   #7 (permalink)
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What Jime says - we generally need more info...

Quote:
Originally Posted by Imamatthews View Post
Have not checked for codes this year....
Is the IMA warning light and CEL ON or OFF?

Quote:
Originally Posted by Imamatthews View Post
Sometimes the IMA Battery goes down to 3 bars....
This is usually indicative of what I described earlier, that is, if you're not actually using a ton of assist to gradually take the BAT gauge down to 3 bars... Usually, when there's problems, the first thing people see is the BAT gauge plummeting from somewhere up high to 3 bars (it plummets to 1 bar, but it re-charges so fast that by the time you notice it it's at 3 bars).

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....and doesn’t seem very “receptive “ to accepting a recharge. Other times it seems to take a charge in a normal manner.
What are you seeing that underlies your idea of 'not being receptive' to a charge?

Quote:
Originally Posted by Imamatthews View Post
This may seem anecdotal, but I have read about people who have had several G1s and once in awhile they get one that stands out from the others for max MPG and much easier for getting into lean burn. And it seems they can’t always figure out what the hang up was with the others....
That's been known to happen, but it's rare. And the difference/s aren't glaring. Over 6, 7 years, I've seen maybe 3 or 4 people comment on something like that. But that stuff isn't really related to the types of IMA problems your descriptions suggest...

You should probably reset your computers by pulling the underdash #18 fuse or 12V neg cable. The 'computers' have been known to get confused at times. Checking your ground connections and making sure they're intact and solid is also a typical first step - they corrode and break and cause problems. There's two 'to the right/under' the air box and also the 12V neg cable attachment to the firewall.
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Last edited by eq1; 06-03-2019 at 04:46 PM.
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Old 06-03-2019, 04:32 PM   #8 (permalink)
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I say, lets start with codes. If the check engine or IMA light are lit, you have codes. Take it to an auto parts store and see if they can read them. Sometimes they can't because it is a hybrid. O'Reiley's seems to usually work.

MPG is very much in driving style, driving mix, terrain, weather and tires (RE92 a must for good numbers-8 to 10 mpg penalty without).
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Old 06-03-2019, 05:29 PM   #9 (permalink)
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I don’t have answers to all of your questions. But I will shortly. No IMA light. I have never seen the BAT gauge at one bar. Sometimes when it is down to 3 bars it seems to take a charge readily, other times it won’t easy budge. I disconnected the starting battery overnight, about 1 week ago.
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Old 06-03-2019, 05:33 PM   #10 (permalink)
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Based on YouTube vids, I think I can’t get into LBM as easily and can’t stay in as easily. Terrain is not all flat here, some hills.
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