Quote:
Originally Posted by Hybrid-Battery-Repair
... 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. ...
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When I had to replace the pack on my Insight after it sat too long (and may have had a bad battery pack fan circuit), I got a permanent IMA error light. It would stop charging if I had to run the engine above 4,000 rpm, and eventually resume charging on its own if kept below about 3,000 rpm during the same drive. I've gotten the impression from prior posts elsewhere here that it does that to protect the DC-DC from excessive AC voltage from the pancake motor/generator at high rpm, probably also to free up a few hp under assumed high load conditions (I think the old CRX HF did something similar for the same reason, so it makes sense for the Insight to do so in basically CRX HF mode w/o its IMA operational).
