Star08

hello CL,

I recently bought a 96 SC300.
the car's key less was working fine for the first week i had the car,but all of a suddenly the key less stopped working.It will unlock the car, but will not lock the car.After a brief trouble shooting of the problem i realized that the car will not lock with the inside switch neither(door switch). i checked all fuses,and they were all good.I checked a small black box under the dash,between to the brake and gas pedal. it clicks......but not sure if this is normal....

please if anyone has experienced this,please help me out.

thanx

tritron

Did you try new ecu ? The lock uses ground so if you look for wiring diagram.
You will find wires that lock and unlock doors. So you can use wire one end you need to attach to ground the other end to other wire that you are testing. Is there alarm in your car. I had problem were lock wire was shorting to ground and keep locking my doors and unlocking did not work

Star08

the alarm is stock.
the key less and the switch only open the car,but do not close.

Amini9

help this guy out.

if this ever happened to me, i would go nuts.

Star08

oh,the trunk does not open neither.it only opens with the key

tritron

you need to test your unlock wire.
1995-96 Lexus SC300 Alarm, Remote Starter, Keyless Entry Wiring Information
Constant 12V+ White/Red Ignition Switch Harness
Starter Black/White Ignition Switch Harness
Ignition Black/Yellow Ignition Switch Harness
Ignition 2 Black/Orange Ignition Switch Harness
Accessory Pink/Blue Ignition Switch Harness
Tach Black Igniter, Passenger's Fender
Brake Switch Green/White Brake Switch
Trunk Release Black (+) 2 Pin Black Conn. in Driver's Kick Panel
Trunk Pin Red/White (-) Driver's Running Board
Parking Lights Dark Green Driver's Kick Panel White Connector
Head Lamp Red/Yellow (+) Light Switch
Hood Pin n/a
Factory Disarm Green (-) Driver's Kick Panel
Door Trigger Red/White (-) Below Fuse Panel White Connector
Door Lock Red/Black 20 Pin Blue Connector
Door Unlock Green In Driver's Kick
Horn Wire Green/Red (-) Steering Column
Windows Up LF=Green/Yellow, RF=Red/Blue
Windows Down LF=Red, RF=Green/White

Cleanshots

iTrader: (2)

K.I.S.S, keep it simple stupid.... look to the left of the steering wheel down a little bit, next to the trunk and gas cap opener, there is a switch there for turning keyless on and off make sure its on. happen to me i was going insane for like 2 months. i bet you you bumped it with your knee one day, or just plain bumped it...

QwkSC

iTrader: (1)

+1. It's so you can lock the trunk and the Valet can't go thru your stuff.

tromly

Great job triton, you're a credit to CL

Cleanshots

iTrader: (2)

its a switch not for trunk.. the wireless key less on off switch.

Star08

i did that...problem still exists thank you so far for all the great response .
once i find out i will post it

KiroLS

I know this is an ancient thread but I found it when I seached for this "problem". I bought a 1993 SC300 last month and when I got around to addressing the key fob not unlocking my car I found that the button mentioned here was my issue. I'm glad this forum has stayed around long enough to retain this info for others to use.