SolTrain99

iTrader: (1)

I'm installing a Pioneer Avic-D3 in my 1999 Lexus SC300. For the navigation to work on this device I have to connect into the VSS. I need help finding the VSS (Vehicle Speed Senor) wire.

I don't want to screw up anything so if anyone out there has installed this, please help.

thanks.

Carbon J

iTrader: (3)

Check in the audio section, I believe someone had a writeup on this.

SolTrain99

iTrader: (1)

I've looked everywhere. I can't seem to find one for the SC300

SolTrain99

iTrader: (1)

Ok so from ALLDATA i got the following for a 1999 SC300

This is the Location of the ECM


The ECM Terminals Look like this:


The Wiring Diagram is here:





Anyone know which wire I should tap into?
E17-5 or E17-11?

sbullard33

iTrader: (1)

the one you want will be a pulsed signal I would say SP2 by looking at it as it is the negative side

dung0981

iTrader: (1)

You can use multi meter set at AC voltage, tap it to SP+ and drive around to check the voltage. The voltage should increasing when the vehicle is accelerating

JesLet

iTrader: (19)

Looky.. what I found?

Search is your best friend- do it next time.

https://www.clublexus.com/forums/sho...d.php?t=274565

5sp_jzz30

iTrader: (2)

the link in the last post is right. on the other hand its a pioneer and it has a self-learning mode for VSS...meaning you dont need to connect this wire. it will use the satellite signal and the gyro sensor inside to estimate your speed and its always dead on.

i worked at circuit city mobile audio install and had to install a D3 in a volvo s40. i wasnt even going to look for the VSS wire in that car because volvo electrical systems are so tempermental that any disconnected terminal or fuse will trip a a code in the ecu.

i didnt connect the VSS and it works to this day. it was for my buddy. never skipped a beat.

dung0981

iTrader: (1)

you was right...but when you get to somewhere without the sat signal.. you wont get the nav working right. Furthermore, speed sensor help the navigation more accurate when you are doing over or under speed limit.

5sp_jzz30

iTrader: (2)

i dont know i havent noticed any gaps in sat signal yet....maybe this would be true for a cross-country trip.

SolTrain99

iTrader: (1)

Yeah it was the blue/yellow wire that i tapped into and it worked.

SolTrain99

iTrader: (1)

The search function sucks on this site. I spent 3 days looking for this.

al4nek

is it same wire on 95 sc3 ?

SolTrain99

iTrader: (1)

Not Sure. Pull back the carpet from under the passenger side dash. If you see a black cover held down by 2 screws, The ECM should be under there. You need to tap into E17 - 5

If it's not there then i don't know.

stocksc3

I am currently installing a Pioneer AVIC Z130BT into my 1999 SC300 and am having trouble finding the VSS Wire. I think the ECU between a '98 and '99 models are different. Would it still be the Blue/Yellow wire? My ECU is a Toyota 89661-24570, here is a picture of my 1999 ECU.