I dont know the drain on the 12V battery from the normal systems on the car, but I recently drove 450 miles in 8 hours with the IMA light on the whole trip and yet that evening I still had headlights for another 20 miles. The IMA light was lit so I assume the IMA was disabled, but the switch on the battery was NOT disabled.
A P1447 error will not stop the car from charging the 12V battery. It's more of an informational error. It's saying "this HV battery is useless and I'm not going to try to charge or use it". A P1449 error will shut down the DC-DC converter because it cannot safely dissipate the heat (a cell is overheating).
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2001 MT #284 100K miles salvage vehicle restored
MIMA #70P + FAS + TPS mod
ScanGauge II, Euro seat covers (citrus)
"P1576 Motor Drive Module (MDM) Voltge Signal Circuit High input"
and
"P1576 Motor Drive Module (MDM) Voltge Signal Circuit Voltage problem"
This is an implication that the IMA battery is having problems so that is why, I suppose, the IMA light comes on. But it is not clear whether the 12V charging would continue or not. But I suppose it does continue or I could not have gotten 8 hours of use out of it. I did notice that the RED picture of the battery that comes on if you have 12V problems, did NOT come on at any time.
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Jim Isbell
2000, 5 speed, 215,000 miles
"If you are not living on the edge, well then,
you are just taking up too much space."
"P1576 Motor Drive Module (MDM) Voltge Signal Circuit High input"
and
"P1576 Motor Drive Module (MDM) Voltge Signal Circuit Voltage problem"
This is an implication that the IMA battery is having problems so that is why, I suppose, the IMA light comes on. But it is not clear whether the 12V charging would continue or not. But I suppose it does continue or I could not have gotten 8 hours of use out of it. I did notice that the RED picture of the battery that comes on if you have 12V problems, did NOT come on at any time.
I would not assume that it is the battery. The "Voltage Signal Circuit" sounds like an issue with the logic controls for the motor or the MCM. After you get your new sticks next week, put them in and see if it goes away. If not, you may have problems with the components to the left of the battery.
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2001 MT #284 100K miles salvage vehicle restored
MIMA #70P + FAS + TPS mod
ScanGauge II, Euro seat covers (citrus)
That will be a good test. The battery is out now sitting on the bench discharged...I am looking for more weak sticks by letting it sit for a week with no charge. If it survives that with only the three already identified then when the "new" sticks come in and I charge it up. I will try it out.
I put in a refurbed batt several days ago and it has so far cycled between 19 bars and 8 bars several times with nary a whimper. I have noticed that it recovers from low SOC much faster than the one with the three dead sticks and it gives me much more assist than the one with three dead sticks.. I havent gotten it below 8 bars yet because it is resisting going lower. I really have to work on getting it down.
__________________
Jim Isbell
2000, 5 speed, 215,000 miles
"If you are not living on the edge, well then,
you are just taking up too much space."
The rotating IMA motor, generates up to 280 AC three phase power. This power is rectified to DC in the regen circuitry of the inverter, and is also sent to the battery. The dc/dc converter ties into this "Regen" buss, and as long as it is enabled and the IMA battery has power, the 12V system will be charged.
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Mike
Mima Insight MT # 007 2000 5sp AC
Grid/solar charged 48V "Eboost" battery
Drop down "Ewheel" EV 5th wheel.
low price grid charger http://www.99mpg.com/
The rotating IMA motor, generates up to 280 AC three phase power. This power is rectified to DC in the regen circuitry of the inverter, and is also sent to the battery. The dc/dc converter ties into this "Regen" buss, and as long as it is enabled and the IMA battery has power, the 12V system will be charged.
Exactly. Except that in cases of a severe P1449, the car seems to shut down the IMA battery completely. I assume to protect from a severe thermal incident. When my P1449 first kicked in, it stopped charging the 12V. It also shut down the AC (I assume because it had gone into limp-in mode and was trying to save the 12V). After letting it sit for a few hours (ie cool down), everything came back on and the CEL went out (not the IMA light), which suggests that the car cares about it when the P1449 happens and resets when the car is restarted as opposed to a P1447 which stays in effect once set. By that I mean that the car saved the P1449, but only acted on it when it first happened.
Or maybe there's some hidden code that we can't see.
__________________
2001 MT #284 100K miles salvage vehicle restored
MIMA #70P + FAS + TPS mod
ScanGauge II, Euro seat covers (citrus)
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I havent gotten it below 8 bars yet because it is resisting going lower. I really have to work on getting it down.
