Wireless Door Lock ECU Location? (RESOLVED) (1 Viewer)

[Oakleyguy]

EDIT: Question is resolved, answer is in Post # 5

Hi all,

I'm finally trying to add keyless back to the 100 (2005), as I never got the keyfobs from the previous owner. Trouble is, I've had no luck on the aftermarket and I'm not ready to shell out the money for the OEM remote key.

I'm trying to confirm the location of the Wireless door lock ECU, as I want to see if there is an FCC-ID on it for me to reference. The FSM looks to show the ECU in the rear passenger door/quarter panel.

Can any here confirm the location? I wasn't able to find anything solid via search.

 

[Ayune]

On earlier trucks it’s above the brake pedal but the reception sucks at that location. Your pic likely shows the correct location for the newer trucks with better reception although I can’t completely confirm. You can find pics of the earlier box here: Mod: Extending range of keyless entry

FCC ID is HYQ13BAB but when I looked it up it just told me the operating frequency which is the common 315MHz. If you get Toyota fobs you can re-program the entry system to accept them. No need to access the ECU for that.

 

[Oakleyguy]

Yeah, I am trying to locate the ECU to just pull the FCC-ID off of it, as I'm hoping that will help me get the right aftermarket remote.

 

[aging fleet]

D27 is pointing to the door control receiver (referencing a 2007). Looks like it’s on the passenger side between the front and rear doors.

 

[Oakleyguy]

Update, after @aging fleet reminded me of the wiring routing diagram and some exploratory panel removal, I found the wireless receiver/ECU.

It is located behind the driverside rear upper interior panel. I noticed on the second page of the routing diagram that the harness actually was on the other side of the truck.

Good news is that you can access the ECU without fully removing the panels:

Adding further, you can enter the FCC ID number here: LINK, to determine what frequency your receiver uses.

 

[Ayune]

Cool, but why are you blocking out the FCC ID in your pics?

 

[nissanh]

Anyone can make a key to match that frequency and OP will update the title of the thread to "have you seen my truck"?

 

[Ayune]

Anyone can make a key to match that frequency and OP will update the title of the thread to "have you seen my truck"?

Re: Frequency: All of our remotes operate on the same frequency, 315MHz. It’s the unique code that’s built in to the fob that allows it to be ‘learned’ by the ECU and allowed to open the doors.

Re: FCC ID: An FCC ID is the same for every product model within a company. Look at your cell phone and you’ll likely see the certification designations for FCC (US), IC (Canada), C-Tick (AU), Japan, Mexico, CE (EU), etc. For FCC the first three characters are the company ID (assigned by the FCC, Toyota is HYQ), and the remaining characters designate the product and are choosen by the manufacturer.

It’s all public knowledge, nothing unique to his vehicle, that’s why I’m wondering why he went through the effort to hide it. Possible he thinks that info could open his doors...

 

[Oakleyguy]

Re: Frequency: All of our remotes operate on the same frequency, 315MHz. It’s the unique code that’s built in to the fob that allows it to be ‘learned’ by the ECU and allowed to open the doors.

Re: FCC ID: An FCC ID is the same for every product model within a company. Look at your cell phone and you’ll likely see the certification designations for FCC (US), IC (Canada), C-Tick (AU), Japan, Mexico, CE (EU), etc. For FCC the first three characters are the company ID (assigned by the FCC, Toyota is HYQ), and the remaining characters designate the product and are choosen by the manufacturer.

It’s all public knowledge, nothing unique to his vehicle, that’s why I’m wondering why he went through the effort to hide it. Possible he thinks that info could open his doors...

According to my ID, my receiver does not operate at 315MHz; I'm assuming that holds true for the actual remote.

So perhaps I'm being overly cautious/paranoid by by taking 2 seconds to blank it out, but wireless spoofing is becoming more prevalent so it's just a precaution.

 

[abuck99]

The spoofing will occur when someone pulls the signal in range of you while operating the remote, not from the common part number of the ECU shown. That receiver application is for a production range (years), not unique an individual vehicle as Ayune mentioned.

FWIW: That part number fits all LC & LX 03-07

8974160370 - Receiver, door control - Genuine Toyota Part

Genuine Toyota Part # 8974160370 (89741-60370) - Receiver, door control. Fits Land Cruiser, LX 470

parts.toyota.com

 

[Ayune]

Hope you don’t live near this guy: This Hacker's Tiny Device Unlocks Cars And Opens Garages

 

[Oakleyguy]

Hope you don’t live near this guy: This Hacker's Tiny Device Unlocks Cars And Opens Garages

Neat read.

 

[Bovka]

does anyone know where the wire is routed towards from this receiver? my key stopped locking or unlocking remoteley and i have error code B1242 wireless door lock tuner circuit.i dindt go near the receiver but did peel the carpet near the driver side front and rear doors .im assuming i must have damaged a wire or something that connects this receiver and some sort of ecu near the dash. im looking for diagram of the actual wire that connects wireless receiver and mysterious ecu near the dash. thanks mine is 2003 LC100

 

[2001LC]

Are your dome lights working. Receive share a fuse with them in the 07LX, likely in the 03 LC as well. IIRC, dome fuse was in RH junction box (PS foot well) of the 07

 

[Bovka]

Hi. all the fuses, dome lights sunroof are working. key is locking all the doors via driver side door using key. only thing not working is remote locking/unlocking. tested the key and its working also changed the battery in the key fob. locksmith tried to reprogramm the key but said car is not responding to programming and only solution is to find mechanical issue between wireless door lock circuit and door lock motor or something

 

[2001LC]

Make sure locksmith did his job correctly.

Make sure power is getting to the receiver.

In the one I had issue with. It did not have a key fob. I purchased one said to work, it was wrong frequency. Then once I had the correct fob, I got the same code as you. I found it to be a fuse. In the 2006 LX470, it was tied to dome fuse. In 03 it may or may not be tied to a dome fuse. So if everything works you'll need to confirm power is getting to receiver. If it is. Then likely you need a receiver, but check, no response/signal coming out of receiver. But that is not common part to go bad.

 

[gregnash]

Something to also note is that my locksmith first told me that when he was able to get other keys to program but not my last one. He thought it could be something with the immobilizer, the key being bad or maybe I was out of open "slots" to program.
Later I ended up getting TIS TechStream on a laptop and the appropriate cord to connect to the OBD II port. What I found was that all my key slots were filled. Now this is on a 98 so there is no programming function for the fob in the software, however, I know that with 03+ that you can program both through the software which would make me believe there are slots for that as well. Maybe @Mauser can help out with that.

 

[Bovka]

hey everyone , my remote locking no longer works. the key itself is working tested by a professional, key battery is fine, i can use the key to lock all the doors from driver side manually no problem. after using a scanner i get error code B1242 - Wireless Door Lock Tuner Circuit... I know the location of the wireless door lock circuit thank to this forum but im wondering how to test the wireless receiver is working or wires that go to the front dash is working??? what tools do i need to test it? PS: i live in remote place with almost no one with great knowledge about LC100 as well as tight on budget so professional mechanic is out of question...

 

[Bovka]

hey everyone , my remote locking no longer works. the key itself is working tested by a professional, key battery is fine, i can use the key to lock all the doors from driver side manually no problem. after using a scanner i get error code B1242 - Wireless Door Lock Tuner Circuit... I know the location of the wireless door lock circuit thank to this forum but im wondering how to test the wireless receiver is working or wires that go to the front dash is working??? what tools do i need to test it? PS: i live in remote place with almost no one with great knowledge about LC100 as well as tight on budget so professional mechanic is out of question...

How can i test the wiress that connect wireless door lock circuit to to other ECUs? using tester?

 

[jerryb]

you can see the wires in the pic.
blue, violet, blue/yellow and white/black.
assume blueyellow battery, whiteblack ground, violet and blue to body ecu