Thank you for this info on removing the dash panels. I'm not too optimistic that I will be receiving the correct part for the application, but fingers crossed.......

Fortunately I do have a trim removal kit of several plastic wedges and spudgers.

 

I studied the manuals very closely, particularly the sections where individual features can be controlled/disabled/tweaked, and didn't see anything in there relating to the Auto Start/Stop system. The only realistic solution is going to be a dongle-type device that "fools" the system into thinking that it is deactivated.

I just wish someone would create an appropriate part for our LX600 application. I guess it's too low-volume to warrant the effort, sadly.

 

The issue here is that it can't be done. I would be surprised if the code/process is any different than that on the new Tundra and Sequoia. Inserting the dongle literally takes 4 minutes and couldn't be in an easier access spot if you have 10 bucks of interior trim tools. We just need to convince one of the companies that it is worth developing it. I personally would buy two of them, my wife and I both drive LX 600's. I would pay up to $300 for one. I am willing to bet that they could amortize across

 

I wonder if anyone has tried one from a tundra/sequioa, lc300, or lx550

 

My part has hit US shores, and is now in Texas and en route to Maryland. Hoping to have it this weekend or early next week. Looking forward to seeing if this is "The One"........

Does the old LX have a similar Auto Start/Stop system?

I know my wife has a 2023 IS500, and its auto start/stop system is permanently switchable on or off. I really don't know why Lexus didn't do this for the LX600.

Good idea to try for other models using the same powertrain....GX550, Tundra, Sequoia?

 

The eBay auto start/stop thingamajig (supposedly) for the 2022-2024 LX600 arrived in the mail today. It came with an orange trim panel spudger tool.

Here are photos of the unit and the connectors. I took multiple photos of the male connector.

comparing to photos of the AliExpress unit, it looks identical — eight male prongs.

So, it is likely that it won’t work. I’ll probably have to return it for a refund.

 

I have some promising news to report: The eBay Auto Start/Stop module I purchased recently, DOES FIT BOTH CONNECTORS ON MY 2024 LX600 !!!

Today I removed the end-piece on the dashboard, using a "spudger" tool. You work the spudger around the perimeter of the plastic end-cap on the dashboard, and its integrated clips will release. You can see this in the photos below (minus the spudger tool).


Plastic end-cap, loosened.

Plastic end-cap, removed.


After removing the end-cap, you will see the following plastic "cage". You will need to remove two silver 10mm bolts, using a 1/4" drive, 10mm socket. You can see the cage here, with the bolts removed.


Plastic cage with two 10mm screws removed.


Then, you want to GENTLY pull the cage forward toward the driver's seat. This will release its clips and give you ample room behind it to access the off-white connector to the rear hatch/Auto Start-Stop switches.

Remove the connector from the back of the Auto Start/Stop switch, and plug in the end of the module's connector. In the photos below, you can see that it is an appropriate match, and matches up just fine.


Comparing the module connector and the Lexus connector.

Getting ready to plug the module onto the Lexus connector.

Plugging the connectors together.

All connected. Now for the other side.....


Next, plug the OTHER end of the Auto Start/Stop Module into the connector on the back of the dashboard switch. Again, as you can see, it fits correctly.


Preparing to connect the other end of the module to the dashboard switch connector.....

Looking like it is a connector fit.

Almost plugged together....

Fully plugged into the dashboard switch.


I HAVE NOT yest tested if the module works or not, but will be driving the LX600 later this afternoon.

I did confirm that the rear cargo hatch door switch works fine with the module in place (both open and close functionality).

With the module plugged in, the Auto Start/Stop button does work when pushed and indicates the little symbol in the instrument cluster when the button is pushed, and when pushed again the Circle A symbol disappears. I DO NOT yet know whether the Auto Start/Stop is disabled when driving the truck, but the module being plugged in DOES NOT cause the Circle-A to be displayed.

More soon.

 

Following up on this, I took two different trips out this afternoon around town, with plenty of start and stop traffic. Bottom line is that this Auto Stop/Start dongle, though its connectors do fit the LX600 correctly, DOES NOT disable the Auto Start/Stop function.

I could only disable the function by hitting the button on the dashboard, or by modulating my foot pressure on the brake (don't press too hard), or at a few points when the climate control system was running. Same as normal.

The only thing different I noticed with this dongle installed, is that it does activate the "ECO" green logo on the instrument cluster. Otherwise, ZERO effect.

So, back to the drawing board. Hopefully someone can design a product that actually WORKS.

In the meantime, I will return this product via eBay. It was worth a try......

 

thanks for trying and the update. Dumbest feature on any vehicle vehicle…..

 

This is correct, and with the brake pedal pushed down moderately, waiting at a traffic light, you will see a little inscription on the digital display to the left of the speedo/tach saying "Press down more to activate Start/Stop". So, this "don't push down on the brake pedal too hard" to keep the Auto Start/Stop from engaging, is indeed a thing.

I removed the non-functional Auto Start/Stop Module from the dashboard. No response from the eBay seller, so for ~$35 I'll just chalk it up to experience. Too bad the connectors are now good, but the part itself doesn't work. I wonder if that is the case with other Lexus models using this same module.

 

Thank you very much for sharing your information and experiment you did with the pictures it's very important I can say that for now you are the 1st to reach an adapter that connects to both plugs but unfortunately does not work sadly we are as you said back to the drawing board

 

I did hear back from the eBay seller, in China, about a refund. But at this point the $35 I paid for the module isn't worth my time to package and send back, so I'm writing this one off.

 

I think it depends on the dealer. If they rat you out or not. I have installed "bypass" switches (tiny PC board that keeps the A/S/S permanently "Off) in 3 different new Porsches and when I took them in for service I'm sure the dealer knew it but never said a word. (actually 2 different dealers). My daughter just bought a 2025 NX and hates the A/S/S

 

Did they say if they were working on a dongle that actually works?

 

The seller responded and told me that he would tell the manufacturer that it didn't work. For what that's worth.....

I didn't respond after that - and didn't pursue a refund. For $35-40 it wasn't worth the time and effort.