Quote:
Originally Posted by Mike Dabrowski 2000
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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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.
