Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2004 Infiniti Q45FACTORY OEM SERVICE PROCEDURE
External Pages
These are pages that do not belong to the exact selected vehicle (2004 Infiniti Q45), but are still accessible from a link in your vehicle's manual. Be very cautious using repair info from here because these pages may not apply to your vehicle.
- Different car
- Section 1 (How To Use The Engine Performance Section)
- Section 2 (Electronic Suspension - Wiring Diagrams)
- Section 3 (Engine Controls - On-Vehicle Adjustments - G20 & Q45)
- Section 4 (Engine Controls - Basic Diagnostic Procedures - G20 & Q45)
- Section 5 (Engine Controls - Self-Diagnostics - G20)
- Section 6 (Engine Controls - Self-Diagnostics - Q45)
- Section 7 (Engine Controls - Trouble Shooting - No Codes - G20 & Q45)
- Section 8 (Engine Controls - System & Component Testing - G20 & Q45)
- Section 9 (Engine Controls - Pin Voltage Charts - G20 & Q45)
- Section 10 (Engine Controls - Sensor Operating Range Charts - G20 & Q45)
- Section 11 (Vacuum Diagrams)
- Section 12 (Engine Controls - Removal, Overhaul & Installation - G20 & Q45)
- Section 13 (Wiring Diagrams)
- Section 14 (Engine Controls - Service & Adjustment Specifications)
- Section 15 (Engine Controls - On-Vehicle Adjustments)
- Section 16 (Engine Controls - Basic Diagnostic Procedures)
- Section 17 (Engine Controls - Self-Diagnostics)
- Section 18 (Engine Controls - Self-Diagnostics - 2.2L)
- Section 19 (Engine Controls - Trouble Shooting - No Codes)
- Section 20 (Engine Controls - System & Component Testing)
- Section 21 (Engine Controls - Pin Voltage Charts)
- Section 22 (Vacuum Diagrams)
- Section 23 (Engine Controls - Removal, Overhaul & Installation)
- Section 24 (Engine Performance - Wiring Diagrams)
- Section 25 (Wiring Diagrams)
- Section 26 (Engine Controls - Service & Adjustment Specifications)
- Section 27 (Engine Controls - On-Vehicle Adjustments)
- Section 28 (Engine Controls - Theory & Operation)
- Section 29 (Engine Controls - Basic Diagnostic Procedures)
- Section 30 (Engine Controls - Self-Diagnostics)
- Section 31 (Engine Controls - Self-Diagnostics)
- Section 32 (Engine Controls - Self-Diagnostics)
- Section 33 (Engine Controls - Trouble Shooting - No Codes)
- Section 34 (Engine Controls - System & Component Testing)
- Section 35 (Engine Controls - System & Component Testing)
- Section 36 (Engine Controls - Pin Voltage Charts)
- Section 37 (Vacuum Diagrams)
- Section 38 (Engine Controls - Removal, Overhaul & Installation)
- Section 39 (Wiring Diagrams)
- Section 40 (Engine Controls - On-Vehicle Adjustments - 4 CYL & V6)
- Section 41 (Engine Controls - Service & Adjustment Specifications - 4 CYL & V6)
- Section 42 (Engine Controls - Basic Diagnostic Procedures - 4 CYL & V6)
- Section 43 (Engine Controls - Self-Diagnostics)
- Section 44 (Engine Controls - Self-Diagnostics - 1.8L - XE, GXE)
- Section 45 (Engine Controls - Self-Diagnostics - Quest)
- Section 46 (Engine Controls - Trouble Shooting - No Codes - 4 CYL & V6)
- Section 47 (Engine Controls - System & Component Testing - 4 CYL & V6)
- Section 48 (Engine Controls - Pin Voltage Charts - 4 CYL & V6)
- Section 49 (Engine Controls - Sensor Operating Range Specifications - 4 CYL & V6)
- Section 50 (Vacuum Diagrams)
- Section 51 (Engine Controls - Removal, Overhaul & Installation)
- Section 52 (Engine Performance Wiring Diagrams)
- Section 53 (Engine Controls - Service & Adjustment Specifications - G20 & Q45)
- Section 54 (Disc Brakes)
- Section 55 (Disc Brakes)
- Section 56 (Starters)
- Section 57 (Automatic A/C-Heater Systems)
- Section 58 (Automatic Transmission Diagnosis - U140E & U140F)
- Section 59 (System Wiring Diagrams)
- Section 60 (System Wiring Diagrams)
- Section 61 (System Wiring Diagrams)
- Section 62 (Overhaul - A650E)
- Section 63 (Automatic Transmission - Diagnosis)
- Section 64 (Diagnosis - U150E)
- Section 65 (Engine Controls - Self-Diagnostics - 3.2L)
- Section 66 (Servicing - A/T)
- Section 67 (Automatic Transmission Shift Interlock Systems)
- Section 68 (Computer Relearn Procedures - Import)
- Section 69 (Engine Controls Self-Diagnostics - Pathfinder & QX4)
- Section 70 (Engine Controls - Self-Diagnostics)
- Section 71 (Air Bag Restraint Systems)
- Section 72 (Air Bag Restraint Systems)
- Section 73 (Air Bag Restraint Systems)
- Section 74 (Air Bag Restraint Systems)
- Section 75 (System Wiring Diagrams)
- Section 76 (System Wiring Diagrams)
- Section 77 (System Wiring Diagrams)
- Section 78 (System Wiring Diagrams)
- Section 79 (Power Door Locks, Trunk Lid & Fuel Door Release)
- Section 80 (Engine Controls - Service & Adjustment Specifications)
- Section 81 (Engine Controls - On-Vehicle Adjustments)
- Section 82 (Engine Controls - Theory & Operation)
- Section 83 (Engine Controls - Basic Diagnostic Procedures)
- Section 84 (Engine Controls - Self-Diagnostics)
- Section 85 (Engine Controls - Self-Diagnostics)
- Section 86 (Engine Controls - Self-Diagnostics)
- Section 87 (Engine Controls - Self-Diagnostics)
- Section 88 (Engine Controls - Self-Diagnostics)
- Section 89 (Engine Controls - Trouble Shooting - No Codes)
- Section 90 (Engine Controls - System & Component Testing)
- Section 91 (Engine Controls - System & Component Testing)
- Section 92 (Engine Controls - System & Component Testing)
- Section 93 (Engine Controls - Pin Voltage Charts)
- Section 94 (Engine Controls - Sensor Operating Range Charts)
- Section 95 (Vacuum Diagrams)
- Section 96 (Engine Controls (Removal & Installation))
- Section 97 (Engine Controls - On-Vehicle Adjustments)
- Section 98 (Engine Controls - Basic Diagnostic Procedures)
- Section 99 (Engine Controls - Self-Diagnostics)
- Section 100 (Engine Controls - Trouble Shooting - No Codes)
- Section 101 (Engine Controls - System & Component Testing)
- Section 102 (Engine Controls - Pin Voltage Charts)
- Section 103 (Engine Controls - Sensor Operating Range Charts)
- Section 104 (Vacuum Diagrams)
- Section 105 (Engine Controls - Service & Adjustment Specifications)
- Section 106 (Engine Controls - On-Vehicle Adjustments)
- Section 107 (Engine Controls - Basic Diagnostic Procedures)
- Section 108 (Engine Controls - Self-Diagnostics)
- Section 109 (Engine Controls Self-Diagnostics - Pathfinder)
- Section 110 (Engine Controls - Trouble Shooting - No Codes)
- Section 111 (Engine Controls - System & Component Testing)
- Section 112 (Engine Controls - Pin Voltage Charts)
- Section 113 (Vacuum Diagrams)
- Section 114 (Engine Controls - Self-Diagnostics (QG18DE))
- Section 115 (Multiplex Communication System)
- Section 116 (Engine Immobilizer System)
- Section 117 (Anti-Theft Systems)
- Section 118 (Front (All Models))
- Section 119 (Remote Keyless Entry Systems)
- Section 120 (Power Mirrors)
- Section 121 (Power Seats)
- Section 122 (Cruise Control Systems)
- Section 123 (Instrument Panel)
- Section 124 (Steering Column Switches)
- Section 125 (Wiper/Washer Systems)
- Section 126 (Automatic Headlights)
- Section 127 (Power Moon Roofs)
- Section 128 (Anti-Lock)
- Section 129 (Anti-Lock)
- Section 130 (Multiplex Communication System)
- Section 131 (Body Control System)
- Section 132 (Instrument Panel)
- Section 133 (Steering Column Switches)
- Section 134 (Automatic Headlights & Lighting)
- Section 135 (Wiper/Washer Systems)
- Section 136 (Anti-Lock/Traction Control)
- Section 137 (Power & Heated Seats)
- Section 138 (Moon Roof)
- Section 139 (Power Windows)
- Section 140 (Power Door Locks & Liftgate)
- Section 141 (Anti-Theft System)
- Section 142 (Remote Keyless Entry)
- Section 143 (Engine Immobilizer)
- Section 144 (Cruise Control)
- Section 145 (Anti-Theft Systems)
- Section 146 (Instrument Panel Diagnosis & Testing)
- Section 147 (Anti-Lock Brake System)
- Section 148 (Power Door Locks & Trunk Release)
- Section 149 (Rear Window Defogger)
- Section 150 (Power Windows)
- Section 151 (Electronic Suspension)
- Section 152 (Smart Entrance Control Unit)
- Section 153 (Anti-Theft System)
- Section 154 (Power Door Locks)
- Section 155 (Remote Keyless Entry System)
- Section 156 (Instrument Panel)
- Section 157 (Engine Immobilizer System - Diagnosis)
- Section 158 (Fuses & Circuit Breakers)
- Section 159 (Servicing A/T)
- Section 160 (Front Suspension)
- Section 161 (Wheel Alignment Specifications & Adjustment Procedures)
- Section 162 (Timing Belt Replacement - 4.3L V8)
- Section 163 (Computer Relearn Procedures)
- Section 164 (Computer Relearn Procedures)
- Section 165 (System Wiring Diagrams)
- Section 166 (Engine Controls - Self-Diagnostics)
- Section 167 (Engine Controls - System & Component Testing)
- Section 168 (System Wiring Diagrams)
- Section 169 (System Wiring Diagrams)
- Section 170 (System Wiring Diagrams)
- Section 171 (Engine Controls Removal & Installation)
- Section 172 (System Wiring Diagrams)
- Section 173 (System Wiring Diagrams)
- Section 174 (System Wiring Diagrams)
- Section 175 (System Wiring Diagrams)
- Section 176 (System Wiring Diagrams)
- Section 177 (Engine Mechanical)
- Section 178 (Engine Mechanical)
- Section 179 (Engine Controls - Removal & Installation)
- Section 180 (Engine Controls - Removal & Installation)
- Section 181 (Engine Controls - Removal & Installation)
- Section 182 (Air Bag Restraint Systems)
- Section 183 (Air Bag Restraint Systems)
- Section 184 (Air Bag Restraint Systems)
- Section 185 (Air Bag Restraint Systems)
- Section 186 (Air Bag Restraint Systems)
- Section 187 (Common Specs & Procedures)
- Section 188 (Generators & Regulators)
- Section 189 (Computer Relearn Procedures)
- Section 190 (Specifications & Procedures)
- Section 191 (Wheel Alignment Specifications & Procedures)
- Section 192 (Wheel Alignment Specifications & Adjustment Procedures)
- Section 193 (Wheel Alignment Specifications & Procedures)
- Section 194 (Wheel Alignment Specifications & Adjustment Procedures)
- Section 195 (Brakes Mechanical)
- Section 196 (Electrical Component Locator)
- Section 197 (Disc & Drum)
- Section 198 (Electric Cooling Fans)
- Section 199 (Axle Shafts - Front)
- Section 200 (Axle Shafts)
- Section 201 (Charging System - Generators & Regulators)
- Section 202 (Front Suspension)
- Section 203 (Front Suspension)
- Section 204 (Cooling System Specifications & Drive Belt Routing)
- Section 205 (Fuses & Circuit Breakers)
- Section 206 (Rear Suspension)
- Section 207 (Rear Suspension)
- Section 208 (System Wiring Diagrams)
- Section 209 (System Wiring Diagrams)
- Section 210 (System Wiring Diagrams)
- Section 211 (Generators & Regulators)
- Section 212 (Automatic Transmission Servicing)
- Section 213 (Automatic Transmission Servicing)
- Section 214 (Generators & Regulators)
- Section 215 (Generators & Regulators)
- Section 216 (Servicing)
- Section 217 (Starting System)
- Section 218 (Starters)
- Section 219 (Air Bag Restraint Systems)
- Section 220 (Air Bag Restraint Systems)
- Section 221 (Propeller Shaft)
- Section 222 (Rear Final Drive)
- Section 223 (Driver Information System)
- Section 224 (Engine Mechanical - 2.5L)
- Section 225 (Engine Mechanical - 3.5L)
- Section 226 (Generator, Battery & Starter - Service Data & Specifications (SDS))
- Section 227 (General Information)
- Section 228 (General Information)
- Section 229 (Engine Cooling System Service)
- Section 230 (Automatic Transaxle Diagnosis)
- Section 231 (Automatic Air Conditioner)
- Section 232 (Can)
- Section 233 (Air Conditioning)
- Section 234 (Propeller Shaft)
- Section 235 (Steering System)
- Section 236 (Power Tilt And Power Telescopic Steering Column)
- Section 237 (Air Conditioning System)
- Section 238 (Abs)
- Section 239 (Alignment Specifications & Procedures)
- Section 240 (General Information)
- Section 241 (Engine Lubrication System - 2.5L)
- Section 242 (Engine Cooling System - 2.5L)
- Section 243 (Exhaust System - 2.5L)
- Section 244 (Clutch)
- Section 245 (Manual Transmission)
- Section 246 (Automatic Transmission)
- Section 247 (Road Wheels & Tires)
- Section 248 (Power Steering Gear And Linkage)
- Section 249 (Seat Belt System)
- Section 250 (Power Door Lock System)
- Section 251 (Remote Keyless Entry System)
- Section 252 (Trunk Lid Opener)
- Section 253 (Power Window System)
- Section 254 (Rear Window Defogger)
- Section 255 (Sun Roof)
- Section 256 (Exterior Trim & Interior Trim)
- Section 257 (Instrument Panel)
- Section 258 (Seat System)
- Section 259 (Automatic Air Conditioner)
- Section 260 (Power Supply Routing Circuit)
- Section 261 (IPDM E/R (Intelligent Power Distribution Module Engine Room))
- Section 262 (Ground Circuit)
- Section 263 (Combination Meters)
- Section 264 (Warning System - Warning Lamps)
- Section 265 (BCM (Body Control Module))
- Section 266 (Can System)
- Section 267 (Audio System, Visual System & Telephone System)
- Section 268 (Manual Air Conditioner)
- Section 269 (General Information)
- Section 270 (Engine Mechanical)
- Section 271 (Engine Cooling System)
- Section 272 (Exhaust System)
- Section 273 (Clutch System)
- Section 274 (Manual Transaxle)
- Section 275 (Transfer Case - ATX14A)
- Section 276 (Driveshaft)
- Section 277 (Front Final Drive)
- Section 278 (Abs)
- Section 279 (Body & Trim)
- Section 280 (Harness Connector)
- Section 281 (Power Supply Routing)
- Section 282 (Headlamp (For USA))
- Section 283 (Headlamp (For CANADA) Daytime Light System)
- Section 284 (Parking License & Tail Lamps)
- Section 285 (Meters And Gauges)
- Section 286 (Warning System - Warning Lamps)
- Section 287 (Audio System)
- Section 288 (Power Sunroof)
- Section 289 (Vehicle Security (Theft Warning) System)
- Section 290 (Can Communication)
- Section 291 (Wiper System & Washer System & Horn System)
- Section 292 (Automatic Transmission)
- Section 293 (Engine Lubrication System - 3.5L)
- Section 294 (Engine Cooling System - 3.5L)
- Section 295 (Exhaust System - 3.5L)
- Section 296 (Anti-Lock Brake System & Traction Control System - Abs/TCS)
- Section 297 (Standard Bolt)
- Section 298 (Automatic Transmission (Service Specifications))
- Section 299 (Engine Control System - Diagnosis)
- Section 300 (Electronic Modulated Suspension - Diagnosis)
- Section 301 (Abs W/ EBD - Diagnosis)
- Section 302 (Abs W/EBD & BA & TRAC & VSC System - Diagnosis)
- Section 303 (Automatic Transaxle - Diagnosis)
- Section 304 (Air Conditioning System - Diagnosis)
- Section 305 (Lighting System - Diagnosis)
- Section 306 (Wiper & Washer - Diagnosis)
- Section 307 (Audio System - Diagnosis)
- Section 308 (Power Window Control System - Diagnostics)
- Section 309 (Power Mirror Control System - Diagnosis)
- Section 310 (Combination Meter - Diagnosis)
- Section 311 (Front Power Seat Control System (With Memory) - Diagnosis)
- Section 312 (Power Door Lock - Diagnosis)
- Section 313 (Wireless Door Lock - Diagnosis)
- Section 314 (Luggage Compartment Door Opener System - Diagnosis)
- Section 315 (Key Unlock Warning System - Diagnosis)
- Section 316 (Engine Immobilizer System - Diagnosis)
- Section 317 (Theft Deterrent System - Diagnosis)
- Section 318 (Multiplex Communication System - Diagnosis)
- Section 319 (Can Communication System - Diagnosis)
- Section 320 (Cruise Control System - Diagnosis)
- Section 321 (Engine Control System)
- Section 322 (Fuel System)
- Section 323 (Emission Control System)
- Section 324 (Intake Air Control System)
- Section 325 (Engine (Mechanical))
- Section 326 (Engine Exhaust Assembly)
- Section 327 (Cooling System)
- Section 328 (Lubrication System)
- Section 329 (Ignition System)
- Section 330 (Wheel Alignment)
- Section 331 (Abs Brake Sensors/Actuators)
- Section 332 (Automatic Transaxle (On-Vehicle Service))
- Section 333 (Steering Column)
- Section 334 (Power Steering)
- Section 335 (Heater & Air Conditioner)
- Section 336 (Instrument Panel/Meter)
- Section 337 (Theft Deterrent Systems)
- Section 338 (Sliding Roof System)
- Section 339 (Cruise Control)
- Section 340 (Engine Hood/Door (Service Specifications))
- Section 341 (Steering Column)
- Section 342 (Headlight Dimmer Switch)
- Section 343 (Audio & Visual System)
- Section 344 (Instrument Panel/Meter)
- Section 345 (Rear Seat)
- Section 346 (Front Door)
- Section 347 (Rear Door)
- Section 348 (Introduction)
- Section 349 (Automatic Transmission (Service Specifications))
- Section 350 (Automatic Transmission - Diagnosis)
- Section 351 (Power Tilt & Telescopic Steering Column - Diagnosis)
- Section 352 (Power Seat Control System - Diagnosis)
- Section 353 (Rear Left Seat Control System - Diagnosis)
- Section 354 (Rear Right Seat Control System - Diagnosis)
- Section 355 (Rear Seat Switch System - Diagnosis)
- Section 356 (Theft Deterrent System - Diagnosis)
- Section 357 (Cruise Control System - Diagnosis)
- Section 358 (Engine Immobilizer System - Diagnosis)
- Section 359 (Combination Meter System - Diagnosis)
- Section 360 (Combination Switch Control System - Diagnosis)
- Section 361 (Steering Pad Switch System - Diagnosis)
- Section 362 (Rain Sensor System - Diagnosis)
- Section 363 (Sliding Roof - Diagnosis)
- Section 364 (Driver Side Junction Block (Body No. 2 Control System) - Diagnosis)
- Section 365 (Passenger Side Junction Block (Body No. 3 ) Control System - Diagnosis)
- Section 366 (Luggage Room Junction Block (Body No. 4) Control System - Diagnosis)
- Section 367 (Front Light (Body No. 5) Control System - Diagnosis)
- Section 368 (Driver Door Control System - Diagnosis)
- Section 369 (Passenger Door Control System - Diagnosis)
- Section 370 (Rear Left Door Control System - Diagnosis)
- Section 371 (Rear Right Door Control System - Diagnosis)
- Section 372 (Gateway System - Diagnosis)
- Section 373 (Audio System - Diagnosis)
- Section 374 (LEXUS Navigation System - Diagnosis)
- Section 375 (LEXUS Link System - Diagnosis)
- Section 376 (LEXUS Park Assist System - Diagnosis)
- Section 377 (Air Conditioning System - Diagnosis)
- Section 378 (Troubleshooting)
- Section 379 (Power Source)
- Section 380 (Ignition Switch & Key Unlock Warning Switch)
- Section 381 (Headlight & Taillight System)
- Section 382 (Headlight Beam Level Control System)
- Section 383 (Fog Light System)
- Section 384 (Turn Signal & Hazard Warning System)
- Section 385 (Illumination Light System)
- Section 386 (Interior Light System)
- Section 387 (Stop Light System)
- Section 388 (Headlight Cleaner System)
- Section 389 (Wiper & Washer System)
- Section 390 (Combination Meter)
- Section 391 (Defogger System)
- Section 392 (Power Window Control System)
- Section 393 (Power Door Lock Control System)
- Section 394 (Wireless Door Lock Control System)
- Section 395 (Power Seat Control System)
- Section 396 (Power Mirror Control System)
- Section 397 (Power Shoulder Belt Anchorage System)
- Section 398 (Electro Chromic Mirror System)
- Section 399 (Climate Control Seat System)
- Section 400 (Fuel Lid Opener System)
- Section 401 (Door Closer System)
- Section 402 (Luggage Compartment Door Closer System)
- Section 403 (LEXUS Park Assist System)
- Section 404 (Rear Sunshade System)
- Section 405 (Clock)
- Section 406 (Overhead Junction Block)
- Section 407 (Garage Door Opener System)
- Section 408 (Horn System)
- Section 409 (Sliding Roof - Removal & Installation)
- Section 410 (Instrument Panel)
- Section 411 (Rear Seat (Fixed Type))
- Section 412 (Rear Seat (Power Adjuster Type))
- Section 413 (Seat Belt)
- Section 414 (Seat Belt PRETENSIONER (Front))
- Section 415 (Seat Belt PRETENSIONER (Rear))
- Section 416 (Seat Heater System)
- Section 417 (Fuel System)
- Section 418 (Starting System)
- Section 419 (Charging System)
- Section 420 (Seat Belt System)
- Section 421 (Shift Lock System)
- Section 422 (O/D Direct Clutch Speed Sensor)
- Section 423 (ATF Oil Temperature Sensor)
- Section 424 (Automatic Transmission Unit (Removal & Installation))
- Section 425 (Front Axle)
- Section 426 (Introduction)
- Section 427 (Tire & Wheel)
- Section 428 (Seat Belt)
- Section 429 (Lighting)
- Section 430 (Power Window Control System)
- Section 431 (Mirrors)
- Section 432 (Seats)
- Section 433 (Doors)
- Section 434 (Bumpers)
- Section 435 (Removal & Installation)
- Section 436 (Engine Mechanical)
- Section 437 (Engine Exhaust Assembly)
- Section 438 (Exterior/Interior Trim)
- Section 439 (Firing Order & Cylinder Identification)
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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