Replaced 12v battery-still no start

check your 12v voltage. some optima's need a charge when new.

 

Without being able to get codes.. Check all fuses under the steering column area and in the engine compartment fuse block.

 

kinda low for a new battery, but should work i think.

 

Doesn't seem like a battery issue. Check your oil level first. Disconnect the battery negative again, reconnect after 10 seconds. Then press the brake HARD, hold and press the start button

SM-N900P ?

 

I don't think it's your battery. I'm suspecting it's the brake light switch. You would need the codes read or take a gamble and buy another switch

SM-N900P ?

 

But it shouldn't be your battery now since it's new and you are measuring 12.6 volts. You can try charging it up and see what happens. Are you sure your connections to the battery are tight? Check the negative connection that bolts to the car body.

Did you double check all the connectors are connected? If your car was running fine and you just replaced the battery, all should be fine unless there's a loose connection or forgotten connection. I once forgot to plug back the brake supply power assembly, maybe you did as well?

 

if you were 'able to move it under very diminished power', it sounds like something is seriously wrong. all the 12v does is power up the computers. the hybrid battery starts the ice.

 

how many miles on her? i think you'll chase a lot fewer demons (or at least catch them sooner) if you get the codes read. low/no ice power could be many things i suppose. fuel, injectors, air flow sensor, plugs, the list is almost endless. i don't think it's the hybrid battery though, what does the gauge tell you?

 

You should go to the dealer and get yourself a new negative cable and bolt it securely to the car's body. That sounds to be your problem

SM-N900P ?

 

Do an ECU ID Registration. Same problem I had. Scanner won't pick up the trouble code. Here are the instructions:

8. ECU COMMUNICATION ID REGISTRATION (TRANSPONDER KEY ECU - HYBRID VEHICLE CONTROL ECU): PROCEDURE "E"

NOTICE:

• If the transponder key ECU and/or hybrid vehicle control ECU has been replaced, register the ECU communication ID to both ECUs in order to match their IDs.
• The hybrid control system cannot be started unless the ECU communication ID matches.
• When the transponder key ECU has been replaced, do not turn the power switch from ON to OFF 20 times or more consecutively. The ECU communication ID must be registered before such an occurrence or the transponder key ECU will need to be replaced. If the transponder key ECU is unable to be recognize the hybrid vehicle control ECU, the hybrid control system will be unable to be started. If the transponder key ECU cannot recognize the hybrid vehicle control ECU, the transponder key ECU must be replaced again with a new one.
• After the registration, pressing the power switch may not start the system on the first try. If so, press the poser switch again.
• After the hybrid control system is started, erase DTC B2799 (code for hybrid vehicle control ECU's immobiliser communication error) using either of the following:

- Using the intelligent tester .

- Disconnect the battery for 30 seconds.

(a) Register the ECU communication ID.

(b) Using SST, connect terminals TC and CG of the DLC3.

SST: 09843-18040



(c) Turn the power switch ON (IG) (do not start the hybrid control system) and leave it as is for 30 minutes.

(d) Turn the power switch OFF and disconnect terminals TC and CG.

(e) Check that the hybrid control system starts.

 

The pictures below are for b) above.

 

This def sounds to me like the new battery is not making good contact and is therefore not providing enough power to actuate all the ECU's. Keep your troubleshooting simple. Most of the problems I have encountered are very basic and thinking too hard will lead you astray.