VEHICLE IDENTIFICATION NUMBER
The vehicle identification number is stamped on the vehicle identification number plate and the certification label, as shown in the illustration.
- A: Vehicle Identification Number Plate
- B: Certification Label
GENERAL INFORMATION
A large number of ECU controlled systems are used in the LEXUS GS300/GS430. In general, the ECU controlled system is considered to be a very intricate system requiring a high level of technical knowledge and expert skill to troubleshoot. However, the fact is that if you proceed to inspect the circuits one by one, troubleshooting of these systems is not complex. If you have adequate understanding of the system and a basic knowledge of electricity, accurate diagnosis and necessary repair can be performed to locate and fix the problem. These articles are designed through emphasis of the above standpoint to help service technicians perform accurate and effective troubleshooting, and are compiled for the following major ECU controlled systems
The troubleshooting procedure and how to make use of it are described on their appropriate articles.
| System | Refer to |
|---|---|
| 1. Engine 2JZ - GE | HOW TO PROCEED WITH TROUBLESHOOTING |
| 2. Engine 3UZ - FE | HOW TO PROCEED WITH TROUBLESHOOTING |
| 3. Automatic Transmission 2JZ-GE | HOW TO PROCEED WITH TROUBLESHOOTING |
| 4. Automatic Transmission 3UZ-FE | HOW TO PROCEED WITH TROUBLESHOOTING |
| 5. ABS & Hydraulic Brake Booster Power Supply System | HOW TO PROCEED WITH TROUBLESHOOTING |
| 6. Vehicle Stability Control (VSC) & Brake Assist (BA) System | HOW TO PROCEED WITH TROUBLESHOOTING |
| 7. Power Tilt and Power Telescopic Steering Column | HOW TO PROCEED WITH TROUBLESHOOTING |
| 8. Supplemental Restraint System | HOW TO PROCEED WITH TROUBLESHOOTING |
| 9. Power Seat Control System | HOW TO PROCEED WITH TROUBLESHOOTING |
| 10. Cruise Control System | HOW TO PROCEED WITH TROUBLESHOOTING |
| 11. Engine Immobiliser System | HOW TO PROCEED WITH TROUBLESHOOTING |
| 12. Combination Meter System | HOW TO PROCEED WITH TROUBLESHOOTING |
| 13. Sliding Roof System | HOW TO PROCEED WITH TROUBLESHOOTING |
| 14. Body No. 1 Control System | HOW TO PROCEED WITH TROUBLESHOOTING |
| 15. Body No. 2 Control System | HOW TO PROCEED WITH TROUBLESHOOTING |
| 16. Driver Door Control System | HOW TO PROCEED WITH TROUBLESHOOTING |
| 17. Passenger Door Control System | HOW TO PROCEED WITH TROUBLESHOOTING |
| 18. Rear Left Door Control System | HOW TO PROCEED WITH TROUBLESHOOTING |
| 19. Rear Right Door Control System | HOW TO PROCEED WITH TROUBLESHOOTING |
| 20. Multiplex Communication System | HOW TO PROCEED WITH TROUBLESHOOTING |
| 21. LEXUS Navigation System | HOW TO PROCEED WITH TROUBLESHOOTING |
| 22. Air Conditioning System | HOW TO PROCEED WITH TROUBLESHOOTING |
TROUBLESHOOTING REFERENCE
ABBREVIATIONS USED IN GS300/GS430 ARTICLES
| Abbreviations | Meaning |
|---|---|
| ABS | Anti-Lock Brake System |
| AC | Alternating Current |
| ACC | Accessory |
| ACIS | Acoustic Control Induction System |
| ACSD | Automatic Cold Start Device |
| A.D.D. | Automatic Disconnecting Differential |
| A/F | Air-Fuel Ratio |
| AHC | Active Height Control Suspension |
| ALR | Automatic Locking Retractor |
| ALT | Alternator |
| AMP | Amplifier |
| ANT | Antenna |
| APPROX. | Approximately |
| A/T | Automatic Transmission (Transaxle) |
| ATF | Automatic Transmission Fluid |
| AUTO | Automatic |
| AUX | Auxiliary |
| AVG | Average |
| AVS | Adaptive Variable Suspension |
| BA | Brake Assist |
| BACS | Boost Altitude Compensation System |
| BAT | Battery |
| BDC | Bottom Dead Center |
| B/L | Bi-Level |
| B/S | Bore-Stroke Ratio |
| BTDC | Before Top Dead Center |
| BVSV | Bimetallic Vacuum Switching Valve |
| Calif. | California |
| CB | Circuit Breaker |
| CCo | Catalytic Converter For Oxidation |
| CD | Compact Disc |
| CF | Cornering Force |
| CG | Center Of Gravity |
| CH | Channel |
| COMB. | Combination |
| CPE | Coupe |
| CPS | Combustion Pressure Sensor |
| CPU | Central Processing Unit |
| CRS | Child Restraint System |
| CTR | Center |
| C/V | Check Valve |
| CV | Control Valve |
| CW | Curb Weight |
| DC | Direct Current |
| DEF | Defogger |
| DFL | Deflector |
| DIFF. | Differential |
| DIFF.LOCK | Differential Lock |
| D/INJ | Direct Injection |
| DLI | Distributorless Ignition |
| DOHC | Double Over Head Cam |
| DP | Dash Pot |
| DS | Dead Soak |
| DSP | Digital Signal Processor |
| EBD | Electronic Brake Force Distribution |
| ECAM | Engine Control And Measurement System |
| ECD | Electronic Controlled Diesel |
| ECDY | Eddy Current Dynamometer |
| ECU | Electronic Control Unit |
| ED | Electro-Deposited Coating |
| EDIC | Electric Diesel Injection Control |
| EDU | Electronic Driving Unit |
| EFI | Electronic Fuel Injection |
| E/G | Engine |
| EGR-VM | Exhaust Gas Recirculation-Vacuum Modulator |
| ELR | Emergency Locking Retractor |
| ENG | Engine |
| ESA | Electronic Spark Advance |
| ETCS | Electronic Throttle Control System |
| EVP | Evaporator |
| E-VRV | Electric Vacuum Regulating Valve |
| EXH | Exhaust |
| FE | Fuel Economy |
| FF | Front-Engine Front-Wheel-Drive |
| F/G | Fuel Gage |
| FIPG | Formed In Place Gasket |
| FL | Fusible Link |
| F/P | Fuel Pump |
| FPU | Fuel Pressure Up |
| Fr | Front |
| FR | Front-Engine Rear-Wheel-Drive |
| F/W | Flywheel |
| FW/D | Flywheel Damper |
| FWD | Front-Wheel-Drive |
| GAS | Gasoline |
| GSA | Gear Shift Actuator |
| GND | Ground |
| HAC | High Altitude Compensator |
| H/B | Hatchback |
| H-FUSE | High Current Fuse |
| HI | High |
| HID | High Intensity Discharge (Head Lamp) |
| HPU | Hydraulic Power Unit |
| HSG | Housing |
| HT | Hard Top |
| HWS | Heated Windshield System |
| IAC | Idle Air Control |
| IC | Integrated circuit |
| IDI | Indirect Diesel Injection |
| IFS | Independent Front Suspension |
| IG | Ignition |
| IIA | Integrated Ignition Assembly |
| IN | Intake (Manifold, Valve) |
| INT | Intermittent |
| I/P | Instrument Panel |
| IRS | Independent Rear Suspension |
| J/B | Junction Block |
| J/C | Junction Connector |
| KD | Kick-Down |
| LAN | Local Area Network |
| LB | Liftback |
| LCD | Liquid Crystal Display |
| LED | Light Emitting Diode |
| LH | Left-Hand |
| LHD | Left-Hand Drive |
| L/H/W | Length, Height, Width |
| LLC | Long-Life Coolant |
| LNG | Liquified Natural Gas |
| LO | Low |
| LPG | Liquified Petroleum Gas |
| LSD | Limited Slip Differential |
| LSP & PV | Load Sensing Proportioning And Bypass Valve |
| LSPV | Load Sensing Proportioning Valve |
| MAX. | Maximum |
| M-FUSE | Medium Current Fuse |
| MIC | Microphone |
| MIL | Malfunction Indicator Lamp |
| MIN. | Minimum |
| MP | Multipurpose |
| MPX | Multiplex Communication System |
| M/T | Manual Transmission (Transaxle) |
| MT | Mount |
| MTG | Mounting |
| N | Neutral |
| NA | Natural Aspiration |
| No. | Number |
| O/D | Overdrive |
| OEM | Original Equipment Manufacturing |
| OHC | Overhead Camshaft |
| OHV | Overhead Valve |
| OPT | Option |
| O/S | Oversize |
| P & BV | Proportioning And Bypass Valve |
| PCS | Power Control System |
| PCV | Positive Crankcase Ventilation |
| PKB | Parking Brake |
| PPS | Progressive Power Steering |
| PS | Power Steering |
| PTO | Power Take-Off |
| R & P | Rack And Pinion |
| R/B | Relay Block |
| RBS | Recirculating Ball Type Steering |
| R/F | Reinforcement |
| RFS | Rigid Front Suspension |
| RH | Right-Hand |
| RHD | Right-Hand Drive |
| RLY | Relay |
| ROM | Read Only Memory |
| Rr | Rear |
| RR | Rear-Engine Rear-Wheel Drive |
| RRS | Rigid Rear Suspension |
| RWD | Rear-Wheel Drive |
| SDN | Sedan |
| SEN | Sensor |
| SICS | Starting Injection Control System |
| SMT | Sequential Manual Transmission |
| SOC | State Of Charge |
| SOHC | Single Overhead Camshaft |
| SPEC | Specification |
| SPI | Single Point Injection |
| SRS | Supplemental Restraint System |
| SSM | Special Service Materials |
| SST | Special Service Tools |
| STD | Standard |
| STJ | Cold-Start Fuel Injection |
| SW | Switch |
| SYS | System |
| T/A | Transaxle |
| TACH | Tachometer |
| TBI | Throttle Body Electronic Fuel Injection |
| TC | Turbocharger |
| TCCS | TOYOTA Computer-Controlled System |
| TCV | Timing Control Valve |
| TDC | Top Dead Center |
| TEMP. | Temperature |
| TEMS | TOYOTA Electronic Modulated Suspension |
| TIS | Total Information System For Vehicle Development |
| T/M | Transmission |
| TMC | TOYOTA Motor Corporation |
| TMMK | TOYOTA Motor Manufacturing Kentucky, Inc. |
| TRAC | Traction Control System |
| TURBO | Turbocharger |
| U/D | Underdrive |
| U/S | Undersize |
| VCV | Vacuum Control Valve |
| VENT | Ventilator |
| VIN | Vehicle Identification Number |
| VPS | Variable Power Steering |
| VSC | Vehicle Skid Control |
| VSV | Vacuum Switching Valve |
| VTV | Vacuum Transmitting Valve |
| W/ | With |
| WGN | Wagon |
| W/H | Wire Harness |
| W/o | Without |
| 1st | First |
| 2nd | Second |
| 2WD | Two Wheel Drive Vehicle (4x2) |
| 4WD | Four Wheel Drive Vehicle (4x4) |
ABBREVIATIONS TERMS