Firstlexy

Hey guys have a couple of questions for my 04 sc 430. First, the interior trunk release button doesn't work, valet button is off, trunk will open with key fob and of course with the manual release in the arm rest. Anyone know wich fuse controls the trunk release? ( fuel door release button works) any thing else to look at before I open the dash? My second question is about the B1S1 02 sensor I bought from NAPA. part number 24560 fron NTK. The end unit was smaller than the stock one I pulled out but NAPA swears this is the right part number. Every couple days it trips code for 02 not reading or lean codes. Anyone else tried the NAPA? What's a good known replacement brand? Thanks!

iolmaster

iTrader: (1)

I have always used Denso for my replacement sensors. I tried one of the name brands from Advance Auto and it did not work even though the store said it was the correct part. Went back to Denso and have never had a problem. This is on three Lexus vehicles I have owned. Denso is OEM.

Firstlexy

Then Denso it is, thank you!

Bgw70

give Rockauto and Amazon a look…
Might be cheaper.
B1S1 (Left) is different from B2S1 (Passenger)

https://www.rockauto.com/en/catalog/...2)+sensor,5132

Raven01750

I'm not sure you ever received an answer on your trunk release. Here is the diagram showing the "Luggage Compartment Door Opener Switch " to the Drivers side JB ECU to the Luggage Room JB ECU to the motor. I would start here.
Here's another detail.



If the fuel door opens you should check fuse 7.5A MPX-B3. Good luck.

Paul

Cinc04

For that luggage compartment door issue, check that the trunk opener switch is functioning properly. If you can open/close the retractable roof, that proves the switch is okay. There is a 10 amp fuse that powers the fuel door opener and the luggage compartment door opener. Since the fuel door works, the fuse should be okay.

I'd next check the luggage compartment door opener switch. I don't think you have to tear into the dash. I took a look up under my dash and took a photo of the back side of the switch. I think you could back-probe the switch to be sure it is functioning properly. You could check for battery voltage at terminal 5, shown in the wiring diagram above. You could check continuity from the same terminal all the way to ground. Be careful, that is a non-switched circuit and is always "hot" unless the battery is disconnected.

Firstlexy

Guys that info is awsome! I'll dive into it and let you know what I find. Thanks again.