Notices
SC - 1st Gen (1992-2000)

SC400 door lock problem...

Old Nov 15, 2011 | 07:42 PM
  #1  
718murdoc's Avatar
718murdoc
Thread Starter
Lead Lap
 
Joined: Jan 2010
Posts: 451
Likes: 0
From: NewYork
Default SC400 door lock problem...

Hi everyone,
My door locks on my 92 sc400 will intermittently lock by itself without touching the switch. I don't know why it's doing this. Could It be a ground issue somewhere? Any insight would be appreciated.

Last edited by 718murdoc; Dec 12, 2011 at 05:41 PM.
Reply
Old Dec 12, 2011 | 05:48 PM
  #2  
718murdoc's Avatar
718murdoc
Thread Starter
Lead Lap
 
Joined: Jan 2010
Posts: 451
Likes: 0
From: NewYork
Default

Also is there a way to disable the power locks to prevent the car from locking itself for the time being while i get a chance to have it looked at ?
Reply
Old Dec 12, 2011 | 06:33 PM
  #3  
scguy's Avatar
scguy
Driver
 
Joined: Nov 2011
Posts: 116
Likes: 0
From: ca
Default

U can unplug motores and lock and unlock maunely
Reply
Old Dec 12, 2011 | 07:00 PM
  #4  
718murdoc's Avatar
718murdoc
Thread Starter
Lead Lap
 
Joined: Jan 2010
Posts: 451
Likes: 0
From: NewYork
Default

I thought about just unplugging the actuator but i'm wondering if the security will still be triggered.
Reply
Old Dec 12, 2011 | 07:45 PM
  #5  
mktbully's Avatar
mktbully
Pole Position
iTrader: (7)
 
Joined: Dec 2003
Posts: 266
Likes: 1
From: New York
Default

possible faulty switch? you have another driver's side switch to test with?
Reply
Old Dec 12, 2011 | 08:52 PM
  #6  
718murdoc's Avatar
718murdoc
Thread Starter
Lead Lap
 
Joined: Jan 2010
Posts: 451
Likes: 0
From: NewYork
Default

Originally Posted by mktbully
possible faulty switch? you have another driver's side switch to test with?
That's what I thought it was at first. I unplugged the master switch and with it disconnected it still locks intermittently.
Reply
Old Dec 13, 2011 | 12:21 PM
  #7  
kln552's Avatar
kln552
Rookie
 
Joined: Aug 2009
Posts: 74
Likes: 1
From: Calif.
Default

Ha - mine does the same thing, but fortunately, never with the keys in the car. Frequently, I'll pull into the garage, lock the car, go in the house. Then I'll think of something I need in the car and hit the unlock switch. Go out to the garage, and just before opening the door, damn thing locks itself. Happens all the time, no idea why, but since it only does it when the key fob is outside the car, haven't worried much about it.
Reply
Old Dec 13, 2011 | 07:25 PM
  #8  
718murdoc's Avatar
718murdoc
Thread Starter
Lead Lap
 
Joined: Jan 2010
Posts: 451
Likes: 0
From: NewYork
Default

Originally Posted by kln552
Ha - mine does the same thing, but fortunately, never with the keys in the car. Frequently, I'll pull into the garage, lock the car, go in the house. Then I'll think of something I need in the car and hit the unlock switch. Go out to the garage, and just before opening the door, damn thing locks itself. Happens all the time, no idea why, but since it only does it when the key fob is outside the car, haven't worried much about it.
I really wish I knew why it does this because as I drive, the power locks keep locking themselves over and over. I swear it feels as if someones playing a joke on me with a remote key lol.
Reply
ClubLexus Stories

Celebrating Lexus & Toyota from Around the Globe

story-0

10 Lexus Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-1

8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!

 Michael S. Palmer
story-2

10 Best Lexus Models No One Remembers

 Joe Kucinski
story-3

TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing

 Michael S. Palmer
story-4

Top 10 Lexus & Toyotas to Drive Before You Die!

 Joe Kucinski
story-5

Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation

 Joe Kucinski
story-6

Lexus LC500 Convertible Auction: A Preview of Rising Values?

 Brett Foote
story-7

GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler

 Michael S. Palmer
story-8

9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)

 Joe Kucinski
story-9

2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!

 Brett Foote
Old Dec 14, 2011 | 06:31 AM
  #9  
718murdoc's Avatar
718murdoc
Thread Starter
Lead Lap
 
Joined: Jan 2010
Posts: 451
Likes: 0
From: NewYork
Default

Can all the symptoms I described be caused by a faulty remote key receiver?
Reply
Old Feb 4, 2013 | 09:58 AM
  #10  
crew chief's Avatar
crew chief
Driver School Candidate
 
Joined: Feb 2007
Posts: 7
Likes: 0
From: IL
Default

Did you ever find the problem?
Reply
Old Feb 4, 2013 | 09:56 PM
  #11  
SCMike87's Avatar
SCMike87
Driver School Candidate
 
Joined: Nov 2012
Posts: 33
Likes: 0
From: WA
Default

OH OH OH... PICK ME!

I just had this problem... SAME problem. Driving down the road my locks would freak out by themself. Locks and windows would intermittently work.

You... my good sir... have a broken wire in the door loom. Its kinda a pain in the ***, but you have to take the door panel off, unplug the 3 connectors in the left kick panel that go through the body to the door. pull the wires all the way through.. peel the rubber cover back, cut the factory electrical tape and find the broken wire. Repair the wire (you may need to add a small piece of wire so that its not too tight) tape the **** out of it and call it good! Fixed mine 2 weeks ago, and havent had a problem since.
Reply
Old Mar 17, 2013 | 08:48 PM
  #12  
SCMike87's Avatar
SCMike87
Driver School Candidate
 
Joined: Nov 2012
Posts: 33
Likes: 0
From: WA
Default

did you ever fix your issue??
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Bizangel
ES - 1st to 6th Gen (1990-2018)
2
Feb 18, 2013 09:19 PM
denverdog
LS - 1st and 2nd Gen (1990-2000)
7
Sep 16, 2011 03:53 PM
kendunk21
LX - 1st and 2nd Gen (1996-2007)
6
Feb 7, 2011 02:40 PM
dsiebert
RX - 2nd Gen (2004-2009)
1
Sep 17, 2010 10:52 AM


Thread Tools
Search this Thread

All times are GMT -7. The time now is 09:20 PM.

story-0
10 Lexus Designs That Have Aged Like Fine Wine

Slideshow: Some luxury cars chase trends, but these Lexus models look better now than they did when they first rolled into showrooms.

By Verdad Gallardo | 2026-05-06 17:58:29


VIEW MORE
story-1
8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!

Slideshow: How to Get the Best Fuel Economy with a Hybrid and Plug-In Hybrid!

By Michael S. Palmer | 2026-05-05 20:54:44


VIEW MORE
story-2
10 Best Lexus Models No One Remembers

Slideshow: 10 best Lexus models no one remembers.

By Joe Kucinski | 2026-05-05 17:33:28


VIEW MORE
story-3
TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing

Slideshow: diving into 4Runner TRD Off-Road Premium's pricing, performance, fuel economy, features, and amenities!

By Michael S. Palmer | 2026-04-23 13:09:18


VIEW MORE
story-4
Top 10 Lexus & Toyotas to Drive Before You Die!

Slideshow: the 10 Lexus and Toyota vehicles you need to drive before you die.

By Joe Kucinski | 2026-04-23 10:34:24


VIEW MORE
story-5
Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation

Slideshow: Top 10 Lexus/Toyota models with the lowest 5-year depreciation rate.

By Joe Kucinski | 2026-04-08 12:19:06


VIEW MORE
story-6
Lexus LC500 Convertible Auction: A Preview of Rising Values?

The LC hasn't even disappeared from the Lexus lineup yet, and we're already seeing signs of an explosive market.

By Brett Foote | 2026-04-06 09:25:02


VIEW MORE
story-7
GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler

Slideshow: comparing the pricings, specs, power, fuel economy, fun-factor, and features of the GX 550 Luxury+ and TX 550h+ Luxury.

By Michael S. Palmer | 2026-03-19 13:44:11


VIEW MORE
story-8
9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)

Slideshow: 9 best Lexus models you can buy for half price and 1 you should avoid

By Joe Kucinski | 2026-03-19 12:01:07


VIEW MORE
story-9
2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!

Here's everything you need to know about the latest NX.

By Brett Foote | 2026-03-19 11:56:59


VIEW MORE