No READY LIGHT, car can't start!

Isn’t 11 volts on the 12 v kinda low?

 

Did you try jumping the 12v? Be careful as you do this, as always. 11v might not be enough to get the computers to boot up? They have to be booted before hv contactor will close

Posted via the PriusChat mobile app.

 

yes, this ignoring the 12v is perplexing, are we missing some info?

 

still too low? a new battery should be 12.8 - 13 volts, but may not be your problem.

do you have rodent issues there?

what about the fob battery?

 

With foot off the brake pedal, will pressing the power button allow the car to go to acc mode or ignition-on mode?

Also agree with previous posts that the 12v is sketchy at best. If unable or unwilling to replace it, I would at least hook a jumper pack to it or charger while trying to troubleshoot.

Have you tried inserting the fob into the slot to see if it will go ready?

Can you post a photo or video of the dash when trying to power up?

 

So this has all manifested since the vehicle evidently stalled?
Did the Client simply try restarting it after it stalled before disconnecting the 12V battery?
Did the vehicle throw any codes or warning lights when it stalled?

I'm hoping no damage was done in disconnecting and reconnecting the battery.

Also, he barely drives the car?
Does this mean it sits for long periods? Had it been sitting for a long period?

Then if you answer all this?
I really have no idea....

 

Have you checked the voltage at the jump points under the hood? Just to rule out a bad battery cable.

 

It would usually make the key light flash in the error lights section when you press the power button, and the ready does not come on. Putting the fob in the fob slot eliminates that as a possible problem.

Posted via the PriusChat mobile app.

 

rodente

 

Make sure the battery negative connection to the chassis is in good condition.

 

check the brake light switch

 

check the brake light switch

X2. If the car will go to acc and to ig-on each time you press the power button with no foot on brake, the car is recognizing the key. Foot on brake but not going to ready would lead me to believe there is possibly an interlock missing for that step. The brake switch is part of that, but I'm not certain what else may be required. I know it's been discussed on the forum previously, so it should be in here somewhere. Not sure how that relates to the engine stalling in the original episode, unless there is a common electrical glitch that hasn't been discovered yet. Is 12v power present on the relay control wires when trying to go to ready?

Another thing to think about is the HV battery state of charge. I know you said you checked it with techstream and it showed 55%, but that is probably not true. Your client disconnected the 12v battery. This would set the SOC back to a default value. If the car has been un-driven since that time, the computer has not had a chance to actually re-cal to the true SOC.

There's been many times I've just hopped in my car and gotten out of my driveway and down the road a little bit before the engine kicked on for it's warm-up routine.
Maybe, what he thought was a stall was just the engine never running, just trying to start and then giving up. Then all codes were reset when he disconnected the 12v?

Maybe the shift lever or it's circuit failed or came unplugged?

Throwing stuff at the wall until something sticks.....