This service and repair manual is tied to the 1992 Lexus SC 400 in particular — the 4.0L V8 (1UZ-FE) in Base trim — so the clearances, torque figures and procedures you work from are the ones Lexus published for this model year, not a close approximation carried over from an adjacent one.
Engines
- 4.0L V8 GAS Naturally Aspirated
Trims
- Base
Known issues on the 1992 SC 400. One recall is on federal record for this model year, and it covers the hydraulic service brake foundation components: an incomplete anti-lock brake and traction control computer logic program traps brake fluid pressure in the rear brake lines, and the pressure that never releases makes the rear brakes drag while pedal application applies the front brakes only — early wear of the rear brake lining, increased stopping distances, and a possible loss of vehicle control and a possible accident. Owners have filed 30 complaints for the year, and Lexus has issued no technical service bulletins for it. The diagnostic and repair procedures behind that brake system are here.
Whether you are chasing a rear brake that drags, testing the anti-lock side of the system, or working a routine service interval, it holds you to the OEM procedure and the correct specification for this 1992 SC 400.
THE ANTI-LOCK BRAKE/TRACTION CONTROL COMPUTER LOGIC PROGRAM WAS INCOMPLETE, RESULTING IN THE TRAPPING OF BRAKE FLUID PRESSURE IN THE REAR BRAKE LINES. FAILURE TO RELEASE THE REAR BRAKE LINE PRESSURE CAUSES A CONDITION WHERE BRAKE PEDAL APPLICATION RESULTS IN ACTIVATION OF THE FRONT BRAKE ONLY, AND CONTINUAL REAR BRAKE DRAG.
FAILURE TO RELEASE THE HYDRAULIC PRESSURE IN THE REARBRAKE LINES CAUSES THE REAR BRAKES TO "DRAG" AND A CONDITION WHERE ONLY THEFRONT BRAKES ARE APPLIED WHEN THE BRAKE PEDAL IS DEPRESSED BY OPERATOR. THISRESULTS IN EARLY WEAR OF THE REAR BRAKE LINING, INCREASES OF STOPPING DISTANCES,AND POSSIBLE LOSS OF VEHICLE CONTROL AND A POSSIBLE ACCIDENT.
REPLACE THE DEFECTIVE ANTI-LOCK BRAKE/TRACTION CONTROL COMPUTER, AND IF ANY BRAKE SYSTEM IS DAMAGED FROM THE DEFECTIVE OPERATION OF THE ANTI-LOCK BRAKE/TRACTION CONTROL SYSTEM, REPAIR THE DAMAGE AT NO COST.
Lexus Safety Recall and Service Campaign - Technician Certification Requirements 4.13.2022
POL: This consolidated Tire Warranty Guide contains the complete warranty terms for all brands of ground and spare tires currently in use by Lexus. This information must be kept near the point of vehicle sale and be available to any custome
Brake Pedal Force Gauge SST for Parking Brake Inspection.
Auto matic Transmission Replacement kPrecautions
Windshield Wiper Blade Maintenance and cleaning
Safety Recall and Service Campaign - Technician Certification Requirements
TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin Nos. L-SB-0048-08, PG007-07, PG016-01, PG015-01, PG004-97, PG003-97, PG003-93, PG002-90, L-SB-0048-08, PG007-07, PG016-01, PG015-01, PG004-97, P
TSB: OBSOLETE NOTICE April 06, 2020: This bulletin is now obsolete. Please see L-SB-0008-20. Replacement Certification Labels and VIN Plates
Showing the 8 most recent of 27 technical service bulletins on file with NHTSA.
LOWER CONTROL ARM BALL JOINT SEPARATED WHILE VEHICLE WAS MOVING AT APPROX 30MPH, RUSULTING IN LOSS OF VEHICLE CONTROL. MAJOR DAMAGE TO FENDER WELD, WHEEL AND TIRE. NO PERSON WERE INJURED DUE TO LOW SPEED AND NO TRAFFIC.*AK
WHILE TRAVELING APPROX. 50 MPH HAD REARENDED ANOTHER VEHICLE IN FRONT. UPON IMPACT, AIR BAGS DID NOT DEPLOY. THEY JUST POPPED OUT & COLLAPSED. *AK
CONSUMER WAS DRIVING ON STREET WHEN CAME TO A STOP SIGN,THE VEHICLE STARTED TO ACCELERATE, CAUSING THE DRIVER TO GO THROUGH ONCOMING TRAFFIC, CAUSING AN ACCIDENT. NO INJURY OCCURRED .DEALER NOTIFIED . *AK
CD CHANGER HAS BEEN REPLACED TWICE, FOR THE SAME PROBLEM OF ERRORS AND THE BAD PART IS THAT THERE IS NO SOLUTION FOR ADAPTERS TO GET NEW UNITS. THE DEALER IS THE ONLY PLACE TO GET A UNIT FROM AT HORRIBLE PRICES $700. FOR A NEW ONE AND AROUND $450.00 FOR A REFURBISH ONE THAT WILL PROBABLY FAIL IN A YEAR RIGHT AFTER THE WARR. GO BY WWW.CLUBLEXUS.COM AND GO BY THE SC OR ANY OF THE FORUMS THIS IS A MAJOR PROBLEM.. THE HEADLIGHTS HOLD CONDINSATION THAT BLURS VISION AT NIGHT, THE PWER STEERINGPUM
TL* - THE CONTACT STATED THAT THE 1992 LEXUS SC400, ACCELERATED RAPIDLY TO ABOUT 50 MPH WHILE IN THE DRIVEWAY. SHE STATED THAT WHILE BACKING INTO A DRIVEWAY AT ABOUT 2 MPH THE VEHICLE ACCELERATED. THIS WAS EARLY MORNING OF 01/31/06, THE WEATHER AND DRIVEWAY CONDITIONS WERE DRY. THE GAS PEDAL ACCELERATED AND PRESSED TO THE FLOOR. SHE APPLIED THE BRAKES WITH FORCE, BUT THE VEHICLE DIDN'T STOP. THE CONTACT STATED THAT THE VEHICLE HIT ANOTHER VEHICLE IN THE DRIVEWAY. THIS ALSO HAPPENED TO HE
MY CAR IS A USED 1992 LEXUS SC400 AND I BOUGHT IT FROM A PRIVATE OWNER AND I DIDN'T HAVE THE CAR FOR A WEEK AND THE CAR CAUGHT ON FIRE. *TR
TL*THE CONTACT OWNS A 1992 LEXUS SC400. WHILE DRIVING 35 MPH, THE HYDRAULIC BRAKING SYSTEM TRAPPED THE BRAKE FLUID PRESSURE AND THE REAR BRAKE LINE. AS A RESULT, THE REAR BRAKES BEGAN TO DRAG AND ONLY THE FRONT BRAKES COULD BE USED. THE DEALER STATED THAT THE VIN WAS NOT INCLUDED IN NHTSA CAMPAIGN ID NUMBER 92V046000 (SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS). THE PURCHASE DATE WAS UNKNOWN. THE CURRENT MILEAGE WAS 191,000 AND FAILURE MILEAGE WAS 185,000.
TS
THE INSTRUMENT CLUSTER OF MY 1992 SC400 IS GOING OUT AND AT NIGHT, I HAVE TO USE A FLASH LIGHT TO SEE MY GAUGES. LEXUS OPTION IS TO REPLACE THE WHOLE CLUSTER WITH AN IMPROVED DESIGN FOR AROUND $1500! *JB
VEHICLE ACCELERATES WHEN BRAKES ARE APPLIED. *MR WHEN THE CONSUMER STEPPED ON THE BRAKE PEDAL, THE VEHICLE ACCELERATED INSTEAD OF STOPPING. THE SERVICE DEALER STATED THAT THERE WAS NO PROBLEM. *SC *JB
THE INSTRUMENT PANEL GAUGE LIGHTS ON MY 1992 SC40 BEGAN GOING BAD AT AROUND 75,000 MILES [1999]. BY 95,000 MILES 50% OF LIGHTS ARE OUT. BY DESIGN THE PANEL/NEEDLES MUST BE REPLACED WHICH IS A VERY EXPENSIVE PROCEDURE. I HAVE BEEN PUTTING IT OFF BECAUSE MY WIFE USUALLY ONLY DRIVES THE SC400 DURING THE DAYLIGHT HOURS, BUT NOW MY SON WOULD LIKE TO TAKE IT OVER AND THE PROBLEM OF SAFETY DURING NIGHT DRIVING COMES INTO PLAY. TOYOTA/LEXUS SHOULD BE ASHAMED OF BUILDING SUCH A GREAT CAR WITH A MONUMENT
WHILE DRIVING VEHICLE 25-35 MPH WENT TO ROLL DOWN PASSENGER'S SIDE WINDOW HEARD NOISE AND DRIVERS SIDE DOOR SWUNG OPEN FOR NO REASON. OWNER ALSO NOTES AFTER PROBLEM OCCURRED DOOR COULD NOT BE OPENED FROM OUTSIDE.CAUSE UNKNOWN. *AK
THE VEHICLE HAS HAD AN ON GOING PROBLEM WITH THE TRACTION CONTROL LIGHTS COMING ON AND OFF. THE PROBLEM HAS WORSENED OVER TIME AND NOW THE LIGHT REMAINS ON. THERE WAS A HYDRAULIC BRAKES RECALL 92V046000 ON THIS ISSUE BUT THE MANUFACTURE IS INDICATING THAT THE VIN NUMBER ISN'T INCLUDED. THE CONSUMER HAD THE VIN NUMBER RUN BY ALLDATA AND A MECHANIC WHO INDICATED THAT THE VIN NUMBER WAS INCLUDED. *NM THE ALL DATA DESCRIPTION OF THE RECALL INDICATED THAT THE REAR BRAKE PADS WOULD BE STRESSED
TRACTION CONTROL FAILED. CONSUMER WAS CONCERNED THAT ABS BRAKES MALFUNCTIONED. A RECALL WAS ISSUED. HOWEVER, THIS VEHICLE WAS NOT INCLUDED IN THE RECALL DUE TO VIN. *AK
THE BRAKE CALIPERS WERE STICKING, CAUSING A LOUD RUBBING NOISE WHEN THE BRAKES ARE APPLIED. ALSO WHEN THE BRAKES ARE APPLIED THE CAR PULLS TO THE LEFT. DLR REPLACED REAR PADS AND ROTORS. *AK
Showing the 15 most serious of 30 complaints filed with NHTSA.
