yoji6365

HELP!! Does anybody know the exact location of the knock sensors for this type engine.
How do I get to tit even if I know the location. I heard on the IUZ engine its under the intake manifold.
I also heard its a PITA to get to. I cant even find the wire that goes to the sensor. Figured it would be going under the intake manifold.

If anyone has ever actually changed the knock sensors or even seen them on a engine, please help. Ive searched all over the net, havent found one that would let me know the exact location.

HarrierAWD

Go to your local library and find the Chilton reference book. It'll show you the knock sensor location, among other things.

yoji6365

Been there, done that, i have a copy. Chilton sux. Haynes didnt make one for the ES300.
I want someone that actually has changed it out, seen it exposed, or at least helped someone who changed out the knock sensor to help me out please.

tech237

under the intake mainfold, top of the block

yoji6365

Awesome, thanks for the answer. Too bad it wasnt the one I was hoping for.
Can you tell me if there are two under there? Thanks again

VVT-i

Yes, they're two knock sensors.

tech237

If you replace the 2 knock sensors make sure you also replace the knock sensor wire......you can thank me later..

yoji6365

Thanks for the help.

One follow up question. If you do get the knock sensor code, does it mean that the sensor or wiring is bad? Or could it be some other condition causing the fault? I ask because

1. When it first came on, it would come on shortly after I get on the road.
2. After a few maintenance sessions, (ie, plugs, pcv valve, fluids, filters, fuel injector cleaner), the light would take alot longer to come one, sometimes not at all. But it would faithfully appear sooner or later.
3. Im thinking its more of a wire problem since a bad sensor should keep the light on all the time.

Anyone else have this condition?

tech237

in my experience the sensors and the wire meet their doom about the same time...as a rule we ALWAYS do the wire and the sensors together...otherwise we end up going back into it the next day..