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Just wondering if anyone else has run into this issue... Our 2006 FEH occasionally decides that it doesn't want to go into all electric mode. The HV battery ends up getting completely charged, but the electric drive just won't kick in. In the past, shutting off the car and starting back up has resolved the issue. This afternoon, however, that wouldn't even work after 3 tries several minutes apart. I'm hoping that it will work again tomorrow, but I just wanted to check if anyone else has already been down this road.

Thanks!
Daniel

Maybe the cat wasn't at temp yet?

I drove the car for approximately 25 minutes, so it definitely should have been up to temp somewhere in there. If it doesn't get better today, I'll take it into the dealer.

Thanks!
Daniel

Just wondering if anyone else has run into this issue... Our 2006 FEH occasionally decides that it doesn't want to go into all electric mode. The HV battery ends up getting completely charged, but the electric drive just won't kick in. In the past, shutting off the car and starting back up has resolved the issue. This afternoon, however, that wouldn't even work after 3 tries several minutes apart. I'm hoping that it will work again tomorrow, but I just wanted to check if anyone else has already been down this road.

Thanks!
Daniel

It could possibly be battery conditioning, but that should only happen occasionally. Once I had it happen 3 times in 1000 miles. If you have a SG, the SoC will climb into the 70's or even 80's. You can then EV for a long time if you can force the ICE off when the SoC starts dropping.

My problem is that all the usual ways to convince the ICE to go to sleep wouldn't work (double brake tap, slow down, etc...).

Thanks!
Daniel

My problem is that all the usual ways to convince the ICE to go to sleep wouldn't work (double brake tap, slow down, etc...).

Thanks!
Daniel
It won't go EV while it is charging up in a battery conditioning event no matter what you do. You can Riverdance the pedal in N and it won't shut the ICE off when charging the battery up in a conditioning event. But once the SoC starts dropping, then you can force it into EV. One time I could go EV with 81.8% SoC and was able to EV for almost 4 miles. Obviously you need some method of seeing the actual SoC to know when this is happening.

FOUR MILES?!? :eek:

The battery SoC indicator was showing a full charge and the car still wouldn't go EV; this has happened a couple of times before, and the dealers can't seem to figure it out. Anyway, it ran normally this morning. =)

Thanks!
Daniel

The battery SoC indicator was showing a full charge and the car still wouldn't go EV; this has happened a couple of times before, and the dealers can't seem to figure it out. Anyway, it ran normally this morning. =)

Thanks!
Daniel
If you mean the battery indicator on the NAV unit, you can't tell from that. All SoC levels 60 or greater display the same, and all SoC levels 40 or less display the same. The only way to know if you are in a reconditioning event is with a Scangauge or some other OBD-II tool.

Stupid question time... ;-) What is a reconditioning event?

Thanks!
Daniel

Stupid question time... ;-) What is a reconditioning event?

Thanks!
Daniel
This is when the cells get out of balance or the SoC calculation is deemed to be significantly in error. The car will charge the HV battery up to a very high SoC and then bleed it down back to the 53% level it wants to keep it at. The owner's manual vaguely alludes to this, but to actually know when it's happening requires a way to retrieve more info from the computers.

This makes total sense with what we have experienced! Thanks for all of your help, Carl!!

It could possibly be battery conditioning, but that should only happen occasionally. Once I had it happen 3 times in 1000 miles. If you have a SG, the SoC will climb into the 70's or even 80's. You can then EV for a long time if you can force the ICE off when the SoC starts dropping.

Funny that you should mention the SoC showing 80. I had this happen the other morning coming home from work about 6 am I was going about 40mph but the SoC did not show that it was EV though. The instant mileage on the SCII read something lilke in the low 100's mpg. Is this normal? I didn't know what to think.

Funny that you should mention the SoC showing 80. I had this happen the other morning coming home from work about 6 am I was going about 40mph but the SoC did not show that it was EV though. The instant mileage on the SCII read something lilke in the low 100's mpg. Is this normal? I didn't know what to think.
The times I've had this happen since I got the SoC xgauge (August, 2007) I have found it somewhat difficult to go into EV. Multiple taps in N will finally get it to shut of the ICE, assuming A/C isn't being demanded by the battery. Otherwise, it will provide large amounts of assist to the ICE which yields the high MPG's you saw despite the fact that the ICE was running.

My 2 cents:

Same thing was happening to me last month--ICE would not shut off. I concluded that it was indeed a "reconditioning event" that never got the chance to complete itself. I shut down and stop before it went through whatever cycle it goes through. My solution was to drive until it went back to normal and that seemed to have worked.

Andrew

What temperature is it when you drive your car? Stored inside or outside? Do you have the AC on Econ or is it set to run all of the time?

If the traction battery (the big battery in the back) is too hot, the FEH and MMH will run the engine to run the AC because they use the AC to cool the traction battery. There are deticated AC lines that run to the traction battery. It will cool the air in the battery compartment and that helps cool the traction battery.

Hope this helps.