Question about 1992 Lexus Sc 400

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How to diagnostis 1992 Lexus V-8 engine control unit

How can I diagnostis 1992 Lexus V-8 Engine Control Unit manual without use scan tool scanner or how can I test 1992 Lexus Engine Control Unit manual without use scan tool scanner. How can I reprogram Engine Control Unit or repair it.

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It's an electrical circuitboard, you need a scanner. There were problems with early lexus ECUs, if your car is having strange problems, replace the ECU first, buy used on ebay. Repair services are also available for even less, if your ECU is not damaged in any way.

Posted on Sep 17, 2009

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To check codes you can use a jumper to connect terminals tc TE1 and E1 together at the data link conector in the engone compartment. this is located at the left fromt of the intake.

Posted on Jun 16, 2009

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SOURCE: Check Engine light and traction control light stay

there is nothing to do here but have the dealer run a scanner test to see what trouble codes were set with the lights coming on, until then there is no way to tell what the problem might be as there are over 200 possibilities.

Posted on Jun 22, 2009

mkv0525
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SOURCE: oil sludge buildup in engine; anyone gotten repair for free?

getting harder to lexus and toyota to take care of this problem. I have repaired many of them when i worked for lexus. I would car the 1-800 num. for leaxus support.

Posted on May 21, 2009

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SOURCE: trac off and check engine light for lexus es 300

A week ago, on my Lexus ES 300 (2001), "Check Engine" and "Trac Off" lights came on. This coincided with me filling the gas tank to the brim to round the dollar to be paid. I cleaned the gas tank cap and the tank opening. However, both lights persisted. On the same day, when I turned on the car again, there was a hesitance, a stuttering to come on. Both "Check Engine" and "Trac Off" lights were still on.

The next day, the car wouldn't come on at all. It sounded as the battery was dead. I couldn't even jump start the car. So, I got a new battery from Costco ($59) and put it in. It took 15-20 seconds of cranking to get the car started. Once it was started, the engine sounded fine and the RPM normal. The "Check Engine" light was off. However, the "Trac Off" was still on. I cleaned the gas tank cap one more time.

The next morning, when I turned the car on, there was no problems. It came on instantly as it used to be, didn't have any warning lights, and drove smoothly.

Posted on Sep 01, 2009

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How do i replace my stock radio for a after market radio in a 1995 lexus sc400


There are several steps:
1. Take out the center cup-holder (it pops out with a little tug upward). unscrew the 2 screws.

2. On the shifter (lower part) there is a cover that covers 2 screws, unscrew and remove the shifter knob.

3.Take a pick tool and lift the shifter bezel console (black) it also pops up.. there are 3 or 4 connecters (disconnect with a small flat head screwdriver)

4. Once the shift cover is removed, there are several screws and tabs holding the bezel trim down unscrew the screws and lift bezel trim up,

5. Disconnect the ash-tray (blue connector)

6. Disconnect the hazard signal control , volume control connector and the climate control connector.( On the left side)

7. There are 4 screws holding the the radio and climate unit cage to the dash frame. (unscrew)

8. Now it gets a little tight, pull the unit towards you slightly and disconnect to connectors for the climate control unit (on top) and the factroy radio (on the bottom).

9. Next remove the radio and climate control unit from the cage(screws on the sides).

10. Next you will need a new cage: Metra 95-8157B Double DIN Installation Kit for 1992-2000 Lexus SC300 and SC400 (Black)
by Metra Link: http://amzn.com/B001TJG7SA

11. You will need the following harness: Metra 70-8112 Radio Wiring Harness for Toyota Amp Integration 15 Pin by Metra
Link: http://amzn.com/B0002BEUBW and/or Metra 70-1761 Radio Wiring Harness For Toyota 87-Up Power 4 Speaker by Metra Link: http://amzn.com/B0002BEQJ8

12. Match the wires according to the metra kit and new radio instructions.

13. Next follow instructions in reverse for re-stall. GL.

Feb 09, 2014 | 1995 Lexus Sc 400

3 Answers

Engine control unit malfunciton say's on


1. Put the key in the ignition.

2. Turn key all the way forward - not to the point where the car starts, just to the point where all the lights come on. Do it in this sequence: ON-OFF-ON-OFF-ON..

3. Keep a close eye on your odometer. You will see a series of codes display, followed by the word "donE"...

4. These codes will tell you why the "Check Engine Light" is coming on.

5. If you see "P0442" followed by "P0456". These codes mean respectively: EVAP sensor detection... SMALL LEAK. IF IT IS THESE SET OF CODES, fear not - nothing is wrong with your car. Simply tighten your gas cap, then...

6. Pop the hood, disconnect the NEGATIVE battery terminal - DO NOT DISCONNECT THE POSITIVE TERMINAL - FOR THE LOVE OF GOD. You will run the risk of shorting out the electrical system.

7. Wait a couple of minutes, then reconnect.

8. Start the car up and TADA! CEL is gone!

Hope this helps...

Jul 14, 2008 | Dodge Sprinter Cars & Trucks

1 Answer

How to fits my chech light on my 1992 ls 400 lexus


fix 1992 lexus. posted to Acura. ok../....
the lamp is just a warning, it sits behind a sea of tests.!
what we all do, from 1988 to now is..... (USA)
we scan it. in your case this old car does not use modern scan tools
that car is too old here, 1996 is the year of smart OBD2 tools
but not all is lost. there are the blink codes
you insert a bent paper clip (metal) to the CHeck connector
aka: diagnostic jumper.
the CEL them flashes out codes. for what TEST is failing
first google hit.

http://www.troublecodes.net/lexus/

do that, and report the codes.

with out obd2 means OBD1, in that link.
hackers do have scan tools for OBD1, but ill not go there.

Feb 02, 2014 | 2005 Acura RL

1 Answer

Transmission not shifting into overdrive on my Lexus 2000, es300


The following are the general instructions on the start of diagnosing any electronically controlled engine or transmission problem.

The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exceptions to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM or ECM,ECU), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems can and do cause many drive-ability related problem such as rough idle and other symptoms.

Feb 14, 2013 | Lexus ES 300 Cars & Trucks

1 Answer

How to fix GX470 lexus suv 2007 vsc/tract/ engine light on


On this make the warning lights all come on together, the check engine light is the cause of all.
Hello
When the service engine soon light (Also called the check engine light or engine management light) is turned on this is to alert you to the fact that Powertrain Control Module (computer) has detected a failure somewhere in the systems it controls you may not feel any difference in the way the engine runs, this can be the transmission or the engine or emission system, there are fault codes set in the modules memory for these faults. What needs to happen now is to have the powertrain control module scanned with a special tool called an OBD2 electronic engine control scanner or a OBD2 code reader. Once the code(s) are read then you must perform the diagnostics for each code and make the appropriate repairs based on the findings of the diagnosis that was performed, this is called doing "Pinpoint" testing.

Nov 06, 2012 | 2007 Lexus GX470

1 Answer

I have a 92 Lexus. it will only get up to 20MPH .what do i check


Hello


The Engine and Automatic Transmission (not applicable to manual transmissions) in this vehicles drive train are fully electronically controlled by a computer called the PCM and TCM (Power Train Control Module, Transmission Control Module). When a problem like this or other drive-ability related problems occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM. Also always check fuel pressure for correct spec for your make and engine type.


Sep 24, 2012 | 1992 Lexus SC

1 Answer

Lexus sc430 engine light has come on ?


Hello
When the service engine soon light (Also called the check engine light or engine management light) is turned on this is to alert you to the fact that Powertrain Control Module (computer) has detected a failure somewhere in the systems it controls you may not feel any difference in the way the engine runs, this can be the transmission or the engine or emission system, there are fault codes set in the modules memory for these faults. What needs to happen now is to have the powertrain control module scanned with a special tool called an OBD2 electronic engine control scanner or a OBD2 code reader. Once the code(s) are read then you must perform the diagnostics for each code and make the appropriate repairs based on the findings of the diagnosis that was performed, this is called doing "Pinpoint" testing.

Sep 02, 2012 | 2002 Lexus SC 430

2 Answers

Check engine light and vsc trac off lights stay on. Cannot turn svc off by pressing button on Dash


Hi, have you scanned the vehicle to see why your check engine light is on? IF no, you need to. Toyota/Lexus computer system illumniates both engine light and VSC lights whenver a fault occurs in either unit. VSC or stability control is like trac-control or ABS braking system. Get car scanned and make sure all computers are scanned for additional codes, repair them first reset lights and test drive. ON a side note, fixing check engine light will usually take VSC light away also, however sometimes the VSC system will glitch out and a Steering Angle relearn is necessary, it takes about 3mins to perform and a good quality scan tool with 2004 current software. Good Luck.

May 16, 2011 | 2004 Toyota RAV4

1 Answer

The check engine light with lightning bolt will come on and car will stall and not start back up for about 30 min after I tried to get engine codes but the scan tool will not connect I checked all fuses...


Do your radiator fans come on full speed? If so you are losing communication with your engine control unit! Same with the scanner, it links with the diagnostic interface which is integrated in the instrument panel. These are on the driveline CAN-bus! Do any other lights come on? ie ABS light.The main power relay for the engine control unit can play up usually caused by a faulty ignition switch!

Oct 08, 2010 | 2006 Volkswagen New Beetle

1 Answer

92 lexus ls 400 check engine and traction control light came on at the same time, 92 lexus ls 400.


the track off light will come everytime yhe check engine light comes on. this is normal. you need to have the check engine light checked first.you can go to your local parts house they will scan it for so you at least see what area you problem is in and then you can start from there. let me know lf you find out youe engine codes.

May 27, 2009 | 1992 Lexus LS

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