07 Not powering up

Looking for ideas from our experienced troubleshooters.

I have a rough 07 that I picked up cheap to part out or sell complete. I have not heard it run, and would like to get it going to help sell it or parts. This said.

The car went into a local small repair shop because it would not power up and start all the time and then stopped all together. The shop thought it was the combo (dash display) meter as it did not light up and replaced it with another, and nothing changed. The customer then turned the car over to the shop for the bill, and then I got it from them.

The car will not power up, meaning nothing happens when to attempt the start it. No dash lights, No clicks sounds from the back, No multi display (radio, windows, turn signals etc.). The only things that will light up on the dash are the security key symbol and the flashers when pressed.

As I said nothing powers up or lights up on the dash area. The door open light does not light up but the interior lights will light up and work. I have headlights, tail lights and brake lights, and door locks.

What I have checked so far.
Good 12 volt battery. (first thing I checked)
Key fob good, as it will lock and unlock doors fine.
am1 and am2 fuses good. (and I have 12v at the fuses)
Ig1 and ig2 relays check good.
Power source ECU replaced with another, said to be good from parted out car.
Start stop button checked good.
Park button checked good.

I am looking for suggestions from the experienced troubleshooters in this area to help point me as to what to check or try next. Thanks in advance.

 

12.6-7 for days.

 

Yes the HV battery is charged, and the interlock is latched. Even when the HV batteries are low and or the interlock switch is unlocked, the system will still power up just not start.

 

I will give him a call tomorrow Thanks.

 

I called and talked with Matt at Texas hybrid batteries, he was very helpful and took the time to discuss my problem. The power source ECU does not require anything additional to make it work.

Matt was very helpful, but unfortunately has not encountered the issue that I am having.

I will say that my being involved with High end racing (many forms) and automatic transmission repair for nearly 40 years, a person can quickly spot a talker or interweb know it all. Matt is really a good guy and knows this stuff with these cars, If you are in his area or are ever in need of his services get in touch with him.

 

The car has 220K which should have no bearing on this issue.

I have been all over the car for days with a 12v volt meter and the 12v is good every place I have checked. My experience with these cars (nearly 15 years) is that many times even when the 12v battery (or 12v supply) is low, the car will power up (just not completely start the car) or at least to attempt to power up. I have not gotten a single dash light or display to light up with the exception of the security light and flashers.

I will try the reset that you suggested, however I have had the battery unhooked which should have reset things.

As I learned a few years back The HV traction battery can be low or have the safety unlatched, unhooked or even have the entire battery out and on the work bench and the car will power up, just not procced and start. This is not a battery issue 12v or HV.