Go Back   Club Lexus Forums > Lexus Model Forums > GS Models > GS - First Generation
Sign in using an external account
Register Forgot Password?

OBD1 codes NOT displaying

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 09-11-13, 07:27 PM   #1
arfghan
Driver School Candidate
Trader Score: (0)
 
Join Date: Sep 2013
Location: wa
Posts: 18
Question OBD1 codes NOT displaying

First of all, mechanic I am not!
I do my own fluid checks and so on but that's about it. Have seen a lot with various cars through the years, and I do try to get diagnostic ideas before calling in the mechanic.
Our 1995 GS300 has had check engine light on for a long time but ran fine.
Recently it died on freeway. Restarted roughly then would not start after parked.

Trying to read the OBD1 codes so I have an idea how serious, and where to start, but getting nowhere.
I use the wire between Te1 and E1, car in neutral, turn the key on and the CEL just stays solid.
I have tried both the OBD port under the dash and the one in the engine compartment with same results. What am I doing wrong?
This ad is not displayed to registered members.
Register your free account today and become a member on Club Lexus!
arfghan is offline   Reply With Quote
Old 09-11-13, 08:37 PM   #2
Gensc300
Driver
Trader Score: (0)
 
Gensc300's Avatar
 
Join Date: Sep 2012
Location: tx
Posts: 121
Default

Try putting it in park.instead of neutral
Gensc300 is offline   Reply With Quote
Old 09-12-13, 02:39 PM   #3
Nixspeed
Lead Lap
Trader Score: (0)
 
Join Date: Jan 2012
Location: CO
Posts: 509
Default

Yes in park, under the dash is the round obd1 port. Make sure you are in the right holes and all the way in. Use a small diameter paper clip as it'll give you feedback as to when you're in the hole correctly. If its solid you are not doing it right. Also be careful what you are shifting in there. There is a lot of other things in there you can screw up if done wrong.
Nixspeed is offline   Reply With Quote
Old 09-13-13, 12:01 PM   #4
arfghan
Driver School Candidate
Trader Score: (0)
 
Join Date: Sep 2013
Location: wa
Posts: 18
Default no go

First of all, thank you Gensc300 and Nixspeed for your input!
I tried again, in park, using a small paperclip, but with the same non-results.

First time I tried this, I used a large paperclip.
The second time, I stripped insulation off the ends of some copper wire and used that.
This time, I used a small paperclip. Same results each time.

I have a question/clarification, Nixspeed. When you say the paperclip should NOT be solid but should be fully in .... how do I judge that? in the center of each "hole" is a small do-hickey that might be a metal clip. Is that what I want the paper clip to go into?

Thanks to all for any additional info or ideas!
arfghan is offline   Reply With Quote
Old 09-13-13, 01:34 PM   #5
Nixspeed
Lead Lap
Trader Score: (0)
 
Join Date: Jan 2012
Location: CO
Posts: 509
Default

Sorry for the confusion. I was referring to the check engine light. It should not be solid on. It should either blink steady and kinda fast or it'll blink the codes kinda like Morse code. The paper clip should be seated in the little metal clip area. Is this a swapped car or just stock?
Nixspeed is offline   Reply With Quote
Old 09-13-13, 11:51 PM   #6
arfghan
Driver School Candidate
Trader Score: (0)
 
Join Date: Sep 2013
Location: wa
Posts: 18
Default

Nixspeed, our GS300 is stock.
.
I've tried this exercise in every configuration I can think of.
So, with the paperclip in the metal clips of Te1 and E1 ...
1) The paperclip in first, the car in park, turn key.
2) Tried it in park with the key on first, then the paperclip in.
3 & 4) Tried it both ways again, this time with the car in neutral.
EVERY time I have just the solid check engine light!
Pretty sure I have the paperclip seated right ... if I turn the OD on,
the OD light blinks rapidly to show that no codes are there.

There must be some engine codes! What am I doing wrong?
Super frustrating.
arfghan is offline   Reply With Quote
Old 09-14-13, 01:39 AM   #7
TheMole
Lexus Champion
Trader Score: (13)
 
TheMole's Avatar
 
Join Date: Oct 2006
Location: SoCal
Posts: 3,437
Send a message via AIM to TheMole
Default

Are you starting the car or turning the key to the "ON" position?

edit: nevermind just saw that the car wouldn't start
__________________
Electronic Dance Music Thread
98 Mitsubishi Montero 4wd
05 Scion XB - Sold on 9/27/2014
99 Accord Coupe 5 speed - Sold on 3/28/2013
93 Black Onyx JZS147 - Sold on 9/12/2012
93 Diamond White Pearl JZZ31 - RIP on 09/02/2009
TheMole is offline   Reply With Quote
Old 09-14-13, 05:48 AM   #8
Gensc300
Driver
Trader Score: (0)
 
Gensc300's Avatar
 
Join Date: Sep 2012
Location: tx
Posts: 121
Default

Sounds like the classic ecu failure.
Gensc300 is offline   Reply With Quote
Old 09-21-13, 08:53 AM   #9
Boosted1st
Driver School Candidate
Trader Score: (0)
 
Join Date: Aug 2011
Location: WA
Posts: 45
Default

Quote:
Originally Posted by Gensc300 View Post
Sounds like the classic ecu failure.
Yep, sounds like a blown/leaky capacitor...mine did the same thing before I upgraded.
Boosted1st is offline   Reply With Quote
Old 09-21-13, 05:12 PM   #10
Nixspeed
Lead Lap
Trader Score: (0)
 
Join Date: Jan 2012
Location: CO
Posts: 509
Default

If it is bad I have a 94 GS ecu for sale that's good. Not sure if its compatible but should be.
Nixspeed is offline   Reply With Quote
Old 09-24-13, 12:44 PM   #11
arfghan
Driver School Candidate
Trader Score: (0)
 
Join Date: Sep 2013
Location: wa
Posts: 18
Default

Thanks, Nixspeed.
How would I figure out if it is compatible?
Looks like I will have to get a mechanic in here to pull the old ecu to inspect for issues, then to install a replacement. Think that is just beyond me.
My husband and I both feel though, that for style, comfort and reliability (before this!) the Lex is certainly worth some effort to fix.
arfghan is offline   Reply With Quote
Old 09-25-13, 09:07 PM   #12
Nixspeed
Lead Lap
Trader Score: (0)
 
Join Date: Jan 2012
Location: CO
Posts: 509
Default

Its super easy to swap and I'm 90% sure its compatible. Maybe someone else here can back that up to ease your mind. All you need to swap is a trim tool and a 10mm socket. Its on the passenger floor under the carpet. Just remover the door will plate and peel the carpet back and there is the ecu then just unplug it and unbolt the ecu from the floor.
Nixspeed is offline   Reply With Quote
Old 10-04-13, 09:11 PM   #13
onelt1
Driver
Trader Score: (1)
 
Join Date: Apr 2012
Location: KS
Posts: 177
Default

I know on OBDII cars if the cigerite lighter fuse is blown no codes will read, so I would make sure all of your fuses are good before replacing the ECU
onelt1 is offline   Reply With Quote
Old 10-06-13, 09:40 PM   #14
arfghan
Driver School Candidate
Trader Score: (0)
 
Join Date: Sep 2013
Location: wa
Posts: 18
Default

Thanks, onelt1.
I have checked all the blade fuses just to be sure. All tested fine.
arfghan is offline   Reply With Quote
Old 10-11-13, 06:22 PM   #15
arfghan
Driver School Candidate
Trader Score: (0)
 
Join Date: Sep 2013
Location: wa
Posts: 18
Default FINALLY got the codes to display!! O2S

Well, shoot. Was all set to find and swap out the ECU.
Before I did, though, decided to double-check. I took the new battery out of one of our classic trucks, and popped it into the gs300. Tried to run the codes again .. and this time it worked!
Very clearly blinked out code 21 (Main O2S & Heater Signal).
How dumb do I feel? Even though I had previously jump-charged the lexus battery, it obviously wasn't up to the 11 volts needed to run codes.
So NOW I need to identify the o2 sensor and replace it.
TIPS??
Looks fairly simple, as long as I identify the right unit, heheheh.
arfghan is offline   Reply With Quote
Old 10-11-13, 06:22 PM
 
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Code 25, running lean. FAILED emission inspection. aomdedude1 LS400 14 03-10-14 10:38 PM
[Q]OBD2 SC300 5 Speed TT swap w/working OBD2 Port Lowlexus Performance & Maintenance 25 01-10-13 12:48 PM
A-Hole mechanic removed my Check Engine Light maxxteezy GS - Second Generation 19 11-07-12 06:14 AM
1993 lexus egr circuit failure Mavs36 SC 400/300 1 03-21-10 06:50 AM
95 ES300 - Check Engine Light - Paper Clip Method AND OBD II Scanner Don't Work! linakill ES300 and ES330 4 12-18-08 07:48 PM


Tags
check, codes, lexus, obd1, working

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

All times are GMT -7. The time now is 06:47 AM.

Join ClubLexus
Advertising


Copyright © 2000-2008 Internet Brands, Inc. All Rights Reserved
Privacy Policy | Disclaimer | Terms of Use | JOBS


Get all contact info