Toyota Kluger / Highlander GSU50/55 disable LDA and PCS DTC codes

**abzzillla** · 20th October, 2023, 04:08 PM

Hi, I am wanting to upgrade the instrument cluster in my 2014 Toyota Kluger GXL from a monochrome display to one out of a Grande with the nicer looking LCD display, the issues I have noticed so far once I installed the new LCD cluster is 2 errors coming up for the LDA (Lane Departure Assist) system and the PCS (Pre Collision System), I can't seem to figure out how to get rid of them popping up on the screen and I cannot clear them since my Kluger does not have those systems installed, I have also tried connecting it to Techstream but was unable to find any options to disable those systems from the cluster.

I was hoping if anyone here would know if it is possible to permanently remove the error codes from the clusters EEPROM, or if anyone would know what bits in the EEPROM bin to modify.

I haven't made an EEPROM bin file dump yet from the cluster as I am waiting for some EEPROM clips to arrive since I haven't worked on a nano C66 (93C66) EEPROM before, but I will be getting the bin file as soon as I am able to.

Thanks

**Jeff57** · 23rd October, 2023, 02:06 AM

Only way I was able to do it was to "spoof" the LDA and PCS ecus on the CAN network. I just periodically send a CAN message into the cluster making it think everything is operating good with the LDA and PCS yet my vehicle doesnt even have any of these systems.

If a modification to the EEPROM can be made to turn these off that would be awesome and I would love to know how to do it also.

**abzzillla** · 23rd October, 2023, 04:00 AM

Originally Posted by Jeff57

Only way I was able to do it was to "spoof" the LDA and PCS ecus on the CAN network. I just periodically send a CAN message into the cluster making it think everything is operating good with the LDA and PCS yet my vehicle doesnt even have any of these systems.

If a modification to the EEPROM can be made to turn these off that would be awesome and I would love to know how to do it also.

I'm hoping I will eventually find some piece of info that will explain what alot the bits change in the EEPROM, I'm used to playing around with GM (Holden) EEPROMs, this vehicle is the first Toyota I own and also the first vehicle to work on the CANBUS network, so all of this is quite different to me at the moment.

If you don't mind me asking, how did you spoof the ECUs through CANBUS?
I've already managed to grab a wiring schematic for the instrument cluster so I have already identified the CAN LO and CAN HI wires which I can tap into, but will I need some kind of programmed module to install behind the cluster?

**Jeff57** · 24th October, 2023, 12:56 AM

Originally Posted by abzzillla

I'm hoping I will eventually find some piece of info that will explain what alot the bits change in the EEPROM, I'm used to playing around with GM (Holden) EEPROMs, this vehicle is the first Toyota I own and also the first vehicle to work on the CANBUS network, so all of this is quite different to me at the moment.

If you don't mind me asking, how did you spoof the ECUs through CANBUS?
I've already managed to grab a wiring schematic for the instrument cluster so I have already identified the CAN LO and CAN HI wires which I can tap into, but will I need some kind of programmed module to install behind the cluster?

I wish I knew more about the EEPROM bits. I kind of doubt anyone who knows will share unfortunately.

I used an arduino microcontroller with a CAN transceiver. Just send an 8 byte message of all 00 on address 0x411 and 0x412 I think. That is what I would start with if I were you.

**abzzillla** · 24th October, 2023, 02:56 AM

Originally Posted by Jeff57

I wish I knew more about the EEPROM bits. I kind of doubt anyone who knows will share unfortunately.

I used an arduino microcontroller with a CAN transceiver. Just send an 8 byte message of all 00 on address 0x411 and 0x412 I think. That is what I would start with if I were you.

This ain't the first time I've had to deal with figuring out what EEPROM bits I need to modify, I had a similar situation last year working on some GM (Holden) instrument clusters, luckily I had some cheap ones that I didn't care about if they were to get damaged.

The Arduino method sounds interesting, I've never used one before, but I've heard of some amazing things they are capable of, it'll be interesting for me working with one and programming it.

**oluwathanku** · 15th November, 2023, 10:22 PM

Good Day Bro, please can you enlighten me more on how you go about this, have been facing the same issue for the past few months, please i need your help...

**bob191919** · 16th November, 2023, 07:36 AM

Maybe I am wrong, but I think these systems don't live in eeprom data on cluster. Probably in flash and must be reflashed without these systems. Some toyota specialist will know the answer how to change configuration and reflash

**oluwathanku** · 16th November, 2023, 09:08 AM

Originally Posted by bob191919

Maybe I am wrong, but I think these systems don't live in eeprom data on cluster. Probably in flash and must be reflashed without these systems. Some toyota specialist will know the answer how to change configuration and reflash

But he was talking about spoofing the CAN network with Arduino. so that's what am not clear about....