Was driving home in the rain this afternoon. Just cruising around 100km/h, engine turned off, lost all power.

Pulled over to the shoulder. Tried everything. Kept pulling a P0AE2 from the HV control system but nothing else.

Ended up getting a tow home (wasn't far). Put my aux battery on charge and pulled my orange link. The HV battery was rebuilt 14 months ago and still under warranty. Aux batt was replaced a few months ago.

Anyway after the aux batt finished charging i checked some fuses and connectors and everything seemed alright. Passenger side carpet is a little damp so i might pull the seats and console and investigate that further.

Plugged the HV battery link and aux battery back in and the car fired right up. I moved the car forward a few feet and then reversed a few feet and it died. It started the engine and died immediately the next few times i cycled the ignition switch.

Now back to square 1. Still throwing P0AE2 again. I exhanged the aux batt just to be safe.

I will be going over the harness and connectors again next. I have my suspicions about the DC-DC converter or HV ECM (i think there's an integrated relay in there that might be sticking).

Just wanted to know if anyone has seen this issue before or can point me in the right direction.

Thanks!

 

Mods pls delete....

 

Hi buddy,

As a matter of fact, I have a P0AE2-773 fault code on my 07 GS450H and I was about to open up my inverter to see if there was any damage and potentially buy a replacement unit, until I came across your message.

I found some Russian website that explains this but I couldn't understand where I should measure the resistance.

Could you by any chance give me some more precise information or send me some pictures?

Thanks in advance, your help would really be greatly appreciated.

 

..........

 

Oh, I see!

So, what you mean is that the 10 kOhms resistance should be measured across the 2 terminals of the orange service plug, then, after removing said plug and the 2 positive + the one negative cable?

Do you have a link to the service manual perhaps where this (and other diagnostics) could be illustrated or explained in greater detail?

Thank you so much.

 

Not the service plug terminals but the two terminals where the orange wires connect.

Unfortunately i can't link the service manuals here because its only accessible from my work computer. Limited by IP.

I would recommend buying access to the lexus service program because you can get seriously hurt listening to advice from unqualified strangers on the internet

 

For P0AE2
Properly check the main relay. The system main relay harness either is open or shorted also check the system main relay for poor electrical connector and it may be a faulty HV Control E.C.U