Hi All,

I have upgraded the cluster on my 2009 ISF to a 2013 cluster.

Everything is working as it should apart from the TRC light is not showing up when the button is pressed. Even ok start up the light isn’t showing up. Off the car on a bench test all lights up as it should, so the light is there.

Any ideas?

 

that's one thing that doesn't work after the swap, TRC still turns off, but the light doesn't illuminate

seems like it would be a simple fix, but haven't heard of one yet

 

Yeah all checked via Techstream and all good. Wonder if it’s the ABS/VSC ECU that also needs to be upgraded for the light to work

 

That would be my bet. The problem there is what other problems will you encounter by replacing the skid control ECU?

 

yep and at nearly $4k from a dealer for the ECU it’s not worth it.

 

I recall @ISFPOWER back in the day when he still had ISF upgraded to the 2011+ cluster. I remember he had it installed and programmed by dealer under warranty , wondering if he can chime in if his TRC indicator light was working.

 

Don't think he has been here for a while. Just found his old thread here:

https://www.clublexus.com/forums/2ge...-new-look.html

Seems from the pics same issue as mine.

 

It is unlikely to be even close to that much from a breaker (junkyard for the US people). But your point is taken for sure.

 

Odd thing here is that there is a VSC ECU listed for my 2009 car but the car the cluster came from, 2013 lexus say there isn’t one listed.

 

The issue is the entire communication system changed and it's not as simple as just swapping earlier parts over. The skid ecu used to control the light, in 2011 the brake actuator assembly controls all of that and there is no skid ecu like you found out.

The solution I found is hard wiring the trac LED to be controlled outside of the cluster (just isolate the LED inside the cluster and run a power and ground out of the cluster) Then you can have it turn on however you want, with a delay timer, or something tied to the actual switch vs CAN actuation.

 

Toyota did this same thing with the Supras. Early models had a completely different ABS configuration than the 1996 and later models. There was no way to swap between the two generations. There is plenty of evidence to support Lexus rethinking the whole VDIM system on the IS F, and there is clear evidence they changed all the switch gear in the later models which is why I mentioned the potential for issues when swapping these units. Not to mention the time I looked at trying to use the JDM Supra turbo center sections in my US turbos because they used ceramic exhaust wheels. No way that was ever going to happen, and with what Stu Hagen does now, it would have been a complete waste of time and effort anyway.

So it sounds like you'd need a donor car to make this work like the factory intended, and it would be an incredible labor of love to implement. Or you just need to ignore the loss of the VSC indication.

 

Ignore it is then! Lol