2006 Replaced Hybrid and 12v but now Engine will Not Start

And why couldn't this be hybrid battery issue ?? Installation issue ,

 

I believe the hybrid battery that was put in is a bad battery. With a possible high voltage leak in it. That's why your car won't start. You would need to read the codes on the car to determine the problem.

You should have the battery tech come to you with this issue. Where did you find this tech?

SM-N900P ?

 

You need to get on the phone with who ever swapped your HV battery and have them come fix it. At a minimum, they should be able to at least go online with the car using techstream to see what is going on.

 

Unfortunately nobody is really able to answer you until you get the codes read.

 

1. Disconnect the 12V battery, wait a few minutes, then reconnect. See if the car will become READY.
2. If it does, then drive it until warning lights come back on, then have the DTC retrieved.
3. Or buy Mini VCI and run that on a Windows XP or Windows 7, 32 bit OS laptop.
4. If the car will not become READY after performing #1 above, then have the car towed for professional assistance at your Toyota dealer.

 

C1241: Low Battery Positive Voltage. C1241 means that the 12V power supplied to the ECU was abnormally low.

I found the above info from a post by Patrick Wong. Could it be that the 12v auxiliary battery installed was a bad one? Check for corrosion on the battery connections. Also check if there is a loose connection. Start there first. Worst case could be bad skid control ECU.

 

That does not preclude you from checking that the 12 V voltage is not low nor checking that both the 12 V battery terminals and the earth connection (from the negative terminal) to the car body are all clean and tight. Check the obvious first.

 

Try the below steps to check your 12v auxillary battery and report back:

Without brake pedal, press the Power button once and release to enter ACC mode
- Press and hold the MFD Info button, then turn the headlights on and off three times to enter Maintenance mode; release Info button
- Press “Menu” (on screen)
- Press “Display Check”
- Press “Vehicle Signal Check” - the battery voltage is shown and should be about 12.4 to 12.8 Volts (normal for an unloaded battery)
- Again without brake pedal, press Power button and release to put a current load on the battery - the voltage should stay above 12.0V (if less than 12.0V the battery is not well, or there is a fault or unusual load somewhere)
- Press brake pedal and press Power button once to enter "Ready" mode - the battery is now charging at about 14V (if less than 13.6V or more than 14.4 there may be a problem with the charging circuit)
- Turn car OFF to leave Maintenance mode

*Thank you @jdenenberg!

 

It's hard to help those who won't listen..........Advice has been given but no one can force you to take it. For the most-part, the guys on here are pretty smart. Re-read this topic from the beginning. Heed the advice. Maybe your code reader is not picking up the proprietary Toyota codes. If you disconnect the 12v neg terminal, wait a couple minutes and then connect it back, what happens? Everything clears and the car will go to 'ready' again. Right? I believe someone mentioned a HV leak fault is the cause of that symptom...........if that's the case, odds are pretty good there's a HV battery issue...................and please verify the 12v......................take it or leave it.........

 

IF, the 12 V battery will hold the voltage (11.9/12.1) for a good 10-15 min without dropping below 11 V, I would not replace it. However, that voltage indicates the battery is flat and needs to charged up to full. The easiest way to do this is with a modern automatic 3-4-amp charger with an AGM setting. It will take charging for 10 to 16 hours to fully charge, but if your charger is decent it will tell you when the battery is fully charged.

The code (C1310) points to a Malfunction in HV system, and I see no information that would indicate that that is unreasonable to continue investigating along those lines.