2003 Lexus GS 430FACTORY OEM SERVICE PROCEDURE

External Pages

's manual. Be very cautious using repair info from here because these pages may not apply to your vehicle. Different car Section 1 (Engine Controls - Removal, Overhaul, Installation) Section 2 (Electronic Suspension - Wiring Diagrams) Section 3 (Wiring Diagrams) Section 4 (Engine Controls - Service & Adjustment Specifications) Section 5 (Engine Controls - On-Vehicle Adjustments) Section 6 (Engine Controls - Theory & Operation) Section 7 (Engine Controls - Basic Diagnostic Procedures) Section 8 (Engine Controls - Self-Diagnostics) Section 9 (Engine Controls - Self-Diagnostics) Section 10 (Engine Controls - Self-Diagnostics) Section 11 (Engine Controls - Self-Diagnostics) Section 12 (Engine Controls - Self-Diagnostics) Section 13 (Engine Controls - Self-Diagnostics) Section 14 (Engine Controls - Self-Diagnostics) Section 15 (Engine Controls - Trouble Shooting - No Codes) Section 16 (Engine Controls - System & Component Testing) Section 17 (Engine Controls - System & Component Testing) Section 18 (Engine Controls - System & Component Testing) Section 19 (Engine Controls - Pin Voltage Charts) Section 20 (Vacuum Diagrams) Section 21 (Engine Controls - Removal, Overhaul & Installation) Section 22 (Wiring Diagrams) Section 23 (Disc Brakes) Section 24 (Automatic A/C-Heater Systems) Section 25 (Diagnosis - A650E) Section 26 (Automatic Transmission Diagnosis - U140E & U140F) Section 27 (System Wiring Diagrams) Section 28 (System Wiring Diagrams) Section 29 (System Wiring Diagrams) Section 30 (System Wiring Diagrams) Section 31 (System Wiring Diagrams) Section 32 (System Wiring Diagrams) Section 33 (System Wiring Diagrams) Section 34 (Automatic Transmission - Diagnosis) Section 35 (Diagnosis - U150E) Section 36 (Servicing - A/T) Section 37 (Automatic Transmission Shift Interlock Systems) Section 38 (Computer Relearn Procedures - Import) Section 39 (Engine Controls - Self-Diagnostics) Section 40 (Air Bag Restraint Systems) Section 41 (Air Bag Restraint Systems) Section 42 (Air Bag Restraint Systems) Section 43 (Air Bag Restraint Systems) Section 44 (System Wiring Diagrams) Section 45 (Power Door Locks, Trunk Lid & Fuel Door Release) Section 46 (Engine Controls - Self-Diagnostics) Section 47 (Engine Controls - Self-Diagnostics) Section 48 (Engine Controls - Self-Diagnostics) Section 49 (Engine Controls - Self-Diagnostics) Section 50 (Engine Controls - Self-Diagnostics) Section 51 (Engine Controls - Self-Diagnostics) Section 52 (Engine Controls - System & Component Testing) Section 53 (Engine Controls - System & Component Testing) Section 54 (Multiplex Communication System) Section 55 (Engine Immobilizer System) Section 56 (Anti-Theft Systems) Section 57 (Remote Keyless Entry Systems) Section 58 (Power Mirrors) Section 59 (Power Seats) Section 60 (Cruise Control Systems) Section 61 (Instrument Panel) Section 62 (Steering Column Switches) Section 63 (Wiper/Washer Systems) Section 64 (Automatic Headlights) Section 65 (Power Moon Roofs) Section 66 (Power Door Locks, Trunk Lid & Fuel Door Release) Section 67 (Power Windows) Section 68 (Anti-Lock) Section 69 (Power Mirrors) Section 70 (Engine Immobilizer System) Section 71 (Cruise Control Systems) Section 72 (Anti-Theft Systems) Section 73 (Remote Keyless Entry Systems) Section 74 (Wiper/Washer & Headlight Cleaner Systems) Section 75 (Anti-Lock) Section 76 (Power & Heated Seats) Section 77 (Power Moon Roof) Section 78 (Multiplex Communication System) Section 79 (Body Control System) Section 80 (Instrument Panel) Section 81 (Steering Column Switches) Section 82 (Automatic Headlights & Lighting) Section 83 (Wiper/Washer Systems) Section 84 (Power & Heated Seats) Section 85 (Moon Roof) Section 86 (Power Windows) Section 87 (Power Door Locks & Liftgate) Section 88 (Anti-Theft System) Section 89 (Remote Keyless Entry) Section 90 (Engine Immobilizer) Section 91 (Cruise Control) Section 92 (Anti-Lock Brake System) Section 93 (Engine Immobilizer) Section 94 (Electronic Suspension) Section 95 (Engine Immobilizer System - Diagnosis) Section 96 (Electrical Component Locator) Section 97 (Servicing A/T) Section 98 (Timing Belt Replacement - 3.0L 6-Cylinder) Section 99 (Front Suspension) Section 100 (Timing Belt Replacement - 4.3L V8) Section 101 (Engine Controls - Self-Diagnostics) Section 102 (Engine Controls - System & Component Testing) Section 103 (Engine Controls Removal & Installation) Section 104 (System Wiring Diagrams) Section 105 (System Wiring Diagrams) Section 106 (System Wiring Diagrams) Section 107 (System Wiring Diagrams) Section 108 (System Wiring Diagrams) Section 109 (System Wiring Diagrams) Section 110 (System Wiring Diagrams) Section 111 (Engine Mechanical) Section 112 (Air Bag Restraint Systems) Section 113 (Air Bag Restraint Systems) Section 114 (Air Bag Restraint Systems) Section 115 (Specifications & Procedures) Section 116 (Computer Relearn Procedures) Section 117 (Brakes Mechanical) Section 118 (Electrical Component Locator) Section 119 (Electrical Component Locator) Section 120 (Electric Cooling Fans) Section 121 (Electric Cooling Fans) Section 122 (Fuses & Circuit Breakers) Section 123 (Axle Shafts) Section 124 (System Wiring Diagrams) Section 125 (System Wiring Diagrams) Section 126 (System Wiring Diagrams) Section 127 (System Wiring Diagrams) Section 128 (Generators & Regulators) Section 129 (Generators & Regulators) Section 130 (Generators & Regulators) Section 131 (Generators & Regulators) Section 132 (Servicing) Section 133 (Starters) Section 134 (Air Bag Restraint Systems) Section 135 (Air Bag Restraint Systems) Section 136 (System Wiring Diagrams) Section 137 (Electrical Component Locator) Section 138 (Air Conditioning) Section 139 (Water Pump (2JZ-GE)) Section 140 (Radiator (2JZ-GE)) Section 141 (Rear Wheel Alignment) Section 142 (Power Steering Pump) Section 143 (Propeller Shaft) Section 144 (Steering System) Section 145 (Power Tilt And Power Telescopic Steering Column) Section 146 (Air Conditioning System) Section 147 (Ignition Switch & Key Unlock Warning Switch) Section 148 (Fan And Generator V Belt (2UZ-FE)) Section 149 (Coolant (2UZ-FE)) Section 150 (Suspension Control System) Section 151 (Front Wheel Alignment) Section 152 (Steering System) Section 153 (Heater & Air Conditioner) Section 154 (Wiper & Washer) Section 155 (Instrument Panel/Meter) Section 156 (Alignment Specifications & Procedures) Section 157 (Engine Immobilizer System - Diagnosis) Section 158 (Emission Control (2JZ-GE)) Section 159 (Emission Control (3UZ-FE)) Section 160 (SFI System (2JZ-GE)) Section 161 (SFI System (3UZ-FE)) Section 162 (Coolant (2JZ-GE)) Section 163 (Water Pump (2JZ-GE)) Section 164 (Thermostat (2JZ-GE)) Section 165 (Radiator (2JZ-GE)) Section 166 (Coolant (3UZ-FE)) Section 167 (Water Pump (3UZ-FE)) Section 168 (Thermostat (3UZ-FE)) Section 169 (Radiator (3UZ-FE)) Section 170 (Lubrication (2JZ-GE)) Section 171 (Lubrication (3UZ-FE)) Section 172 (Ignition (2JZ-GE)) Section 173 (Ignition (3UZ-FE)) Section 174 (Power Steering Fluid) Section 175 (Power Tilt And Power Telescopic Steering Column) Section 176 (Power Steering Vane Pump (3UZ-FE)) Section 177 (Engine Mechanical (3UZ-FE) (Service Specifications)) Section 178 (Automatic Transmission (Service Specifications)) Section 179 (Air Conditioning (Service Specifications)) Section 180 (Engine (2JZ-GE) - Diagnostics) Section 181 (Engine (3UZ-FE) - Diagnostics) Section 182 (Automatic Transmission - Diagnostics) Section 183 (Automatic Transmission - Diagnostics) Section 184 (Power Tilt & Power Telescopic Steering Column) Section 185 (Supplemental Restraint System - Diagnostics) Section 186 (P

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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