Hybrid battery Diagnostic and recondition

12/12/2025

🚗🔥 Demtrack Hybrid Masterclass (Paid WhatsApp Group) – Now Open!

Are you a mechanic,car owner ,technician or workshop owner who wants to master hybrid diagnostics and repairs?

Join my VIP WhatsApp group and learn:

✓ Hybrid battery diagnosis
✓ Inverter faults & solutions
✓ Wiring tracing & pinout guides
✓ Real workshop case studies
✓ Daily support for your jobs
✓ Weekly training videos/voice notes

Subscription: ₦10,000 per month
Limited slots available!
https://wa.me/message/TR54ZBABLOJWF1

Demtrack Technologies – Fix it. Learn it. Master it.

15/11/2025

🚨 HYBRID NO-START FIXED! (Toyota Highlander Hybrid 2006)

A lady called me — her ’06 Highlander Hybrid suddenly refused to start after a quick stop at the market.

Scan showed: P0AA6 – Hybrid Battery Voltage System Isolation Fault.

Cleared the code → car started.
But after parking → same problem again.
No-start unless we cleared the code or disconnected the 12V battery.

I removed the rear seat to access the HV battery, and the real issue appeared:

💧 Water had entered the HV battery compartment!
Moisture was inside the contactor/relay section, causing the isolation fault.

Cleaned it out, dried everything under the sun, reassembled and tested:

Problem solved
No more P0AA6
Vehicle starting normally again

Lesson: Hybrid systems are very sensitive to water. Even small leaks can shut down the entire system.

03/11/2025

Solved: P3191 & P0A80 on a 2007 Camry Hybrid 🚗⚡

A popular workshop contacted me about a Camry Hybrid that wouldn't start after an engine replacement.
First scan brought up P0A80, meaning the hybrid battery was drained from multiple failed start attempts.
After recharging, reconditioning, and balancing the HV battery, the car started—but died after a few seconds.

Second scan showed P3191 – Engine Does Not Start.
This can come from dirty injectors, low fuel, intake leaks, or a clogged throttle body.

I checked the injectors first—no result.
Then I inspected the throttle body and found heavy carbon dirt blocking the butterfly.
A good cleaning with injector cleaner solved everything.

✅ Car is now running smoothly again.
Demtrack Technologies
Hybrid & EV Systems Specialist

18/10/2025

How to preserve the condition of your hybrid battery

13/07/2025

🔌 Types of Electric Vehicle Powertrains Explained ⚡
1. BEV (Battery Electric Vehicle)
➡ Fully electric, no engine
➡ Charges via plug
➡ Zero emissions
2. PHEV (Plug-in Hybrid Electric Vehicle)
➡ Electric + engine combo
➡ Runs electric first, then engine
➡ Charges externally
3. HEV (Hybrid Electric Vehicle)
➡ Engine + motor
➡ No plug-in charging
➡ Charges via braking/engine
4. FCEV (Fuel Cell Electric Vehicle)
➡ Powered by hydrogen
➡ Converts H₂ + O₂ to electricity
➡ Emits only water v***r

12/07/2025

Battery electric vehicle
Fully electric with no internal combustion engine.Power by an electric motor and rechargeable battery.

Plug -in Hybrid Electric vehicles
combine with an electric motor with an internal combustion engine.These types can operate on electricity alone for short distances,and the engine extends range
Hybrid Electric vehicles
Use both an electric motor and an internal combustion engine l.The battery is charged via regenerative braking,not plugged in
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06/07/2025

When buying a used hybrid vehicle in Nigeria or a foreign used one, what are the things to look for? Foreign used hybrid electric vehicles are still the best if you can afford it. There's nothing much to worry about apart from understanding the principles of operation and finding a technician to handle it. The major thing that normally happens first is a faulty ABS. Hybrid cars' ABS are electric and always energized when the door is open. When taking it for repairs, always disconnect the negative terminal of the 12v battery whenever you visit a workshop to work on the brake or change the brake pad. Nigerian used cars are always sold with problems sometimes. The major things to look for are: 1. ABS, 2. HV battery, 3. inverter/converter assembly, and 4. inverter coolant pump. The ABS and HV batteries are easy to detect physically, but the inverter/converter assembly requires a diagnostic machine to troubleshoot.

21/05/2025

P0AA6 RX 400H,solved by changing the black relay box due to water ingress.

19/07/2024

Bad module due to water ingress inside 2006 Highlander hybrid battery, making the car not to start.

29/03/2024

Exploded battery due to lack of ventilation.

28/01/2024