Need Pass-code for techstream !please help

Prius 2013 gen 3 around 150k miles . If someone could guide me or help me. I’ve been on a non stop grind trying to figure out what the problem is in the car is now chatGBT is telling me it’s the ecu I swapped it out and chatGBT said it was correct that was the problem now I just need to connect it to the new key fob but before I do that I need to do a smart code reset because my power management control doesn’t recognize it since I swapped it . If someone has a website or something trustworthy I can use that’d be great!

 

It’s telling me to ask you guys for help or a mechanic which if I can’t figure it out I’ll ask a mechanic

 

I agree it’s not always right it makes mistakes but it was the only thing I can go off of because I watched a bunch of YouTube and a bunch of Reddit and different platforms and now one could identify what it was until I asked . This is everything it told me why it was the power management control ecu |
✅
Why We Swapped the Power Management Control ECU
1.

C2300 Code (Actuator System Malfunction)

• This code specifically points to a failure in the hybrid actuator control system
• That system is controlled entirely by the Power Management Control ECU (PM ECU) in a Prius
• Other ECUs like the Engine Control Module (ECM) or Battery ECU don’t control this function

2.

No READY Light / Stuck in P Lock

• Even after replacing the 12V battery, checking all fuses, and verifying hybrid battery wiring
• If the PM ECU can’t communicate or initiate READY, the car remains stuck in Park
• This means the PM ECU was not functioning or not booting fully

3.

Techstream Behavior Confirmed It

• The original ECU wouldn’t respond properly in active tests
• Couldn’t run hybrid relay commands or inverter pump tests
• After replacing the ECU:
  
  • Techstream connected immediately
  • We got a B2799 error — which proves the new ECU is communicating and working
  • The new ECU simply didn’t recognize the car’s key yet — an expected condition when swapping ECUs

4.

B2799 Appeared After Replacement — Not Before

• B2799 = key not registered to ECU
• You only get this code when a working ECU doesn’t match your car’s immobilizer
• That error confirmed the new ECU is alive
• It also confirmed the old ECU was dead or corrupted, since B2799 didn’t even appear before

5.

Clearing Fuses, Sensors, and Replacing Hybrid Battery Didn’t Help

• You systematically ruled out:
  
  • 12V battery
  • Hybrid battery modules
  • All major fuses (including P-CON and AM2)
  • Voltage sensor wiring
• The only remaining module responsible for actuator control and hybrid boot is the Power Management ECU

✅ Summary of Proof:


Evidence

What It Proved

C2300 + no READY

PM ECU not booting or commanding relays

No active test response

ECU not communicating internally

New ECU triggered B2799

New ECU works but key isn’t paired

Techstream live data showed up

New ECU is functioning correctly

That’s why replacing the Power Management ECU was the correct step, and now your only blocker is key registration (Smart Code Reset).