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Old 01-04-2021, 10:53 PM #1
mform mform is offline
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KDSS idiot light but no symptoms

Been away for a long time, but finally getting back to where I can do some things with my T4R.

Need to address this issue: KDSS dash light is on (has been for a few months but thatís only been about 3k miles since covid/WFH). There are no other symptoms. No leaks, no clunks, no noises, no changes in driving feel at all. And the light has - at times - even gone off for a few minutes here and there.

My truck is stock re: the drivetrain and suspension bits with exception of running 275s since new (125k miles now).

Iíve read a few KDSS horror stories here, but not this one.

So as Billy Ray Valentine said to the Duke brothersí limo driver in Trading Places: Whatís my move?
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1997 Gen3 SR5 White [best vehicle I ever owned]
1987 Gen1 Black 22RE [gateway drug to lifetime T4R addiction]
Seems like I skip generations....looking forward to Gen7
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Old 01-04-2021, 11:41 PM #2
mo_mo mo_mo is offline
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Quote:
Originally Posted by mform View Post
Been away for a long time, but finally getting back to where I can do some things with my T4R.

Need to address this issue: KDSS dash light is on (has been for a few months but thatís only been about 3k miles since covid/WFH). There are no other symptoms. No leaks, no clunks, no noises, no changes in driving feel at all. And the light has - at times - even gone off for a few minutes here and there.

My truck is stock re: the drivetrain and suspension bits with exception of running 275s since new (125k miles now).

Iíve read a few KDSS horror stories here, but not this one.

So as Billy Ray Valentine said to the Duke brothersí limo driver in Trading Places: Whatís my move?
Just guessing:
If no other flags are thrown, then it's probably related to a pressure sensor or one of the two solenoid control valves as the other systems would throw other codes (VSC). If this is new and maybe goes away when warm, then I would point towards the pressure sensor / system pressure.

If it's driving fine, and you can live with the light, then let it be. If it's bothering you, then you're probably going to have to find a dealership. I don't know if Toyota dealerships deal with KDSS as much as the Lexus (GX) side of the house.

Also, if you wanted to fix it yourself, then you're going to have to pull codes, techstream, etc. There was a 2010 manual floating around on here somewhere at one point.
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Old 01-05-2021, 02:25 AM #3
llDemonll llDemonll is offline
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Take it to a Lexus dealership and have them pull codes and diagnose. They have the tools for KDSS and not all Toyota dealerships do.

Better to know now what the issues are than later down the road.
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