scrim67

this isn't too big a deal but i'm curious as to why my 'DISTANCE AFTER REFUELING' data is sometimes resetting back to zero occasionally when I begin driving even though I haven't refueled.

I get this data on the display screen that's integrated into my nav system.

I have a '98 gs 300.

thanks in advance on any feedback.

scrim

BananaGS

my guess is that the distance can't never be over 500 mile or something, so even you don't reset it, the counter can only count up to 500 and wrap back to 0, like your trip odometer, same way.

scrim67

interesting theory but that's not it.

it's been resetting when I start the car it appears even if it's only 100 miles or whatever.

TimDimman

Sounds like there could be a short...

Tim

girvan

There is a TSB for this that replaces the ENTIRE instrument cluster due to bad embedded software in the fuel gauge!

The dealer will reprogram the new odometer to match the old.

BananaGS

girvan,
he was talking about the distance display in the NAV display, run independent from the instrument cluster.

girvan

Yes I know what he was talking about and I know what I am talking about - the fuel gauge software.

That has an algorithm to differentiate from a fuel slosh and a re-fuel and needs new software. The GS has two fuel sensors in two parts of the tank, either side of the axle and gets fooled with sloshing.

The fuel gauge and other instruments collect information and communicate to the trip computer application running in the NAV computer.

I don’t know the number of the TSB but I did see it on the list. I had mine fixed under warranty but it took a lot of persuasion to get a Lexus to admit they had a problem despite the head mechanic telling me that he had seen many cars like this in 1998.


I know that it is off topic, but my experience with Lexus ethics leaves me very unimpressed. They denied having a problem with front wheel vibration, accelerator lag, this fuel problem and numerous other issues only to issue fat TSB’s dated 6 months previously that must have taken months to work on and were probably in progress as the car was released .

BananaGS

that is strange, the only connection from the car to the nav computer is the speed signal, none other that can effect the distance or fuel setting. You are refering to upgrading the NAV software to correct this? if that so, I would agree, or there is a back up battery inside the nav computer that keep the user setting, that may goes bad.

I just double check the nav schematic I have again, there is no other path that allow the fuel setting to get into the NAV computer, I am missing something here.

The distance and mpg is calculated by the nav software, based on the speed signal (ie you know the speed, you know the distance, you know the mpg) Unless lexus intensionally left out some wire on the dealer schematic book, I don't see how the software in the instrument cluster can communicate with the nav computer. going wireless??

I could be wrong, my car is not equipted with NAV, I added it in, but I don't see any component that I am missing based on the nav schematic that I have. And i do get my mph, distance...etc on my NAV now.
I have disconnected the speed signal and disable these setting, so I am pretty sure that these setting come from the speed signal.

Anh

BananaGS

girvan
here is the GS3 98 TSB,
list out fuel gauge was not display correctly. but that should not effect the NAV.

Also, this is a simplified version of the TSB, if your car is 98, it DOES NOT mean that you are effected by this, just mean that there are a number of people getting these problems, dealer should be aware of the fix. The full version actually tell you what the fix are, and which car/VIN number are being effected.

TSB Number Issue Date TSB Title BO006-02 NOV 02 Interior - Correct Cup Holder Installation
PG012-02 OCT 02 Suspension - Ball Joint Inspection Method
EG002-02 FEB 02 OBD II - Readiness Monitor Drive Patterns
PG002-02 JAN 02 Certification Label - Replacement Availability
PG001-02 JAN 02 Corrections Index - Repair Manual
PG003-02 JAN 02 VIN Plate - Replacement Availability
AX001R-01 MAY 01 Trunk - Retrofit Internal Release Kits
EG002-01 APR 01 EVAP System - Design/Operation/Diagnostics
NV005-01 MAR 01 Glove Box - Rattling Noise
BO005-01 MAR 01 Seat Belt - Revised Tongue Plate Stopper
BO003-01 MAR 01 Headlamp - Service Parts Availability
AX001-01 MAR 01 Internal Trunk Release - Retrofit Kits
ST001-01 FEB 01 Steering Wheel Nut - Torque Standardization
AC001-01 JAN 01 A/C Indicators - Malfunction
PG017-99 DEC 00 Vehicle - Year 2000 Readiness Disclosure
EL008-99 DEC 00 Engine Immobilizer System - Precautions
SS003-00 DEC 00 Diagnostic Tester - Communication Error w/TIS
PG005-00 JUL 00 Service Manual - Page Corrections
AC001-00 JUL 00 A/C - Compressor Maintenance During Storage
EL003-00 APR 00 Distance Since Refueling Display - Inaccurate
NV005-00 APR 00 Center Seat Belt Retractor Cover - Rattle
ST002-00 APR 00 Steering Column - Slider Sub Assembly Available
PG001-00 APR 00 CA/50 State Certified Emission Control Label Ordering
AX001-00 MAR 00 Towing - Dinghy Towing (Four Wheels On the Ground)
NV001-00 JAN 00 Garage Door Opener - Rattles
NV003-00 JAN 00 Glove Box - Rattle Noise
BO005-99 DEC 99 Seat Belt Extender - Availability
BO004-99 DEC 99 Moonroof - Creak Noise Reduction
SU001-99 SEP 99 Wheel Balance - Adjustment Procedure
TC003-99 SEP 99 A/T - Fluid Recommendations
SS007-99 JUL 99 SST Program - Special Service Tools
SS006-99 JUN 99 Scantool Immobilizer - Key Code Utility
SS004-99 JUN 99 Wireless Recognition Codes - Alternate Register Method
EL005-99 JUN 99 Power Moon Roof - Motor
PA002-99 MAY 99 Paint - Refinish Formula Codes
PG010-99 MAY 99 Service - Manual Corrections
BO002-99 APR 99 Glove Box Switch - Rattle Noise
SS001-99 APR 99 Diagnostic Tester - Customize Program Card Update
TC001-99 APR 99 Drive Shaft - Grease Revision
AU001-99 APR 99 AM Radio - Crosstalk Interference
AX003-99 MAR 99 Dinghy Towing Guide - With Four Wheels on the Ground
EL002-99 MAR 99 Antitheft - Troubleshooting Immobilizer DTC B2795
EL003-99 MAR 99 Antitheft - Troubleshooting Immobilizer DTC B2796
PG002-99 FEB 99 Brakes - Publication Correction Information.
SS002-98 DEC 98 Tools - Installing Rivet Nuts
NV020-98 OCT 98 Glove Box Area - Vibration Noise/Rattles
NV018-98 OCT 98 Instrument Panel Area - Squeaks & Rattles
NV021-98 OCT 98 Interior - Squeaks/Rubbing Noise
NV019-98 OCT 98 Package Tray Trim Area - Squeaks & Rattles
AU003-98 OCT 98 Radio - Inoperative In CD Mode
BR002-98 SEP 98 Brakes - Hydraulic Pressure Switch R&R Corrections
AC003-98 SEP 98 A/C - Solution to General Malfunctions
NV006-98 JUL 98 Accelerator Pedal - Vibration
BO004-98 JUL 98 Seat Cover - Service For Side Airbag Equipped Vehicles
BO003-98 JUL 98 Seat Belt - Extenders are Available
SS001-98 JUN 98 Vehicle - Special Service Tools
TC003-98 JUN 98 A/T - Fluid, Type T-IV Introduction
ST003R-98 JUN 98 Steering - Vibration/Flutter
PG004-98 JUN 98 Service Manual - Publication Correction Information
BO002-98 APR 98 Door - Disassembly Precautions
BO001-98 APR 98 Seat Belt - Extenders Available
NV002-98 APR 98 Wind Noise Service Tips
EL005-98 APR 98 Cigarette Lighter - Service
EL006-98 APR 98 Tachometer - Incorrect Indication
EL004-98 APR 98 Wireless Door Lock Control - Programming
EL001-98 JAN 98 Engine Immobilizer - System Precautions
ST001-98 JAN 98 Progressive Power Steering (PPS) - Manual Corrections
EL002-97 DEC 97 Fuel Gauge - Incorrect Reading
PA00297 NOV 97 Paint - Colors
SS002-97 OCT 97 Customize Program Card - Version 1.0 Update
BO007-97 OCT 97 Seat Belt - Extenders Availability
PG005-97 SEP 97 Fuse - Installation During PDS
AC001-97 SEP 97 A/C - Musty Odor
PG006-97 JUL 97 License Plate - Installation During PDS
PG003-97 JUL 97 Certification Labels - Replacement Policy
PG002-97 MAR 97 Air Bag - Information Label On Glove Box Door
PG002-96 APR 96 Emission Control Label Order Form CA/50 State Certified
BO93-007 JUL 93 License Plate - Front And Rear Installation Procedure
PG93-004 MAY 93 A/C - Ozone Depleting Substance Caution Labels
PG93-003 APR 93 Vin Plates/Certification Labels - Replacement
PGI004 SEP 91 Recycled Coolant - Usage Recommendations
BODY026 AUG 91 Body - Permanent Type Protective Wax Coatings

girvan

Banana, thanks for the list. The TSB you highlighted is not the right one. I assume that it is:

EL003-00 APR 00 Distance Since Refueling Display – Inaccurate

Published only 2 years after they found the problem.

Don’t forget that your car has a partially self-healing ring LAN connecting all the major computers - All is not what it seams on these cars. For example, the NAV computer can adjust the mechanics and optics of the CD player and I have reprogrammed my audio DSP through it.

BananaGS