dbullen

iTrader: (3)

Does anyone know where the ECU is located for a first gen LS400 (1992) I took the lining out of the trunk and right below the tool kit is a black box, this box clicks when the lexus phone is used (I'm assuming this isn't the ECU, possibly a ECU for the Lexus phone?) I know it has to be in the trunk somewheres, but I'm not sure what to look for.

Lvangundy

It's under the glovebox.

There is another panel beaneath the glovebox which pops off with a screwdriver (3 or 4 clips) and opens down to expose the ECU and some other wires.

It's really simple..wish I had a pic of mine. Someone here does I'm sure. If not I'll take one today.

dbullen

iTrader: (3)

I'm looking for the Cars ECU to install my ROM chip (For my remote)

The computer is on the same side as the antenna. When you take of the panel the computer is in front of the antenna assembly. Once you have founded it, disconnect the computer and there should be a single phillip head screw that you remove and you should be able to see the old chip. From there just remove and replace it with the new one.

Does this sound correct?

I think I found a pic of the ECU, tell me if this is correct

Lvangundy

OH that chip. Still though, there is an ECU under the glovebox.


I don't know. But. I'd like to know where the remote ECU is because mine has been broken for many years.

Dealer quoted around $400 to fix and replace.

dbullen

iTrader: (3)

I can get the ROM chip and Key for about $130

hyperopt

Let's get something straight here. ECU usually abbreviates for Engine Controll Unit, but some use it to stand for Electronic Controll Unit. The picture you posted is the E(ngine)CU and it is located under the glove compartment as Lvan indicated. I have no clue as to where the remote ROM E(lectronic)CU is but I know that the theft deterrent controll unit is located on the firewall near the steering column.

dbullen: I think you should get your remote ROM straight because I don't think Lexus would put a remote ROM unit inside the E(ngine)CU. This would be a NO...NO.

dbullen

iTrader: (3)

Your right, Looks like I got them mixed up. So you can disregard the pic. All I need to find is the place to install the ROM chip that came with the key set. I will again attempt to take apart my trunk and find the location. Will post pics once it's done so if anyone has this problem in the future it can be easily solved.

LSPiNoY

iTrader: (1)

the electronic ECU is in the trunk on the right side if you have air suspension, but i believe it is the same for computers without it. and there is also a place for a fuse under the driver side for a phone. i believe its number 18

VVT-i

I think he's talking about the remote entry ECU . The chip he's talking about is the old style receiver(chip) that come with the new key and preprogram to the new key to lock and unlock the door. It's on the left hand side of the trunk next to antenna motor assembly as dbullen said in the earier post.
The correct term for the engine control is ECM(Engine Control Module). The rest of the car control units can be call ECU with name in front. For example, Steering ECU, A/C ECU, Air Bag ECU, ABS ECU,etc...

LSPiNoY

iTrader: (1)

ahhhhhhhhhh ok my bad...yeah totally different

dbullen

iTrader: (3)

It was the chip right in front of the antenna housing in the trunk. Took out the ECU and there was a little spot for a chip to be placed inside, you can see from the pics

spxChrome

So you replaced this because you got a new set of keys that work with this ECU?

dbullen

iTrader: (3)

That's correct got a new Key with matching ECU

Maeve

iTrader: (2)

Where and How much did you get them for?

and...is that the same ECU to reset the brake light? Mine is still on since I replced my brakes and the brake sensors. (Note: Lexus dealer wanted $110.00 to reset the light ).

Thanks,

Dominic

VVT-i

This is the keyless entry ECU he's talking about and nothing to do with brake light.
Which brake light are you talking about? The one on the dash that say Brake or the one that have the picture of the circle. Check in your owner's manual for the explanation of the warning light.