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2003 Infiniti Q45 CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Infiniti REPAIR SHOPS DON'T WANT YOU TO KNOW
Learn how to repair a car or truck, install or remove parts, wire an engine, reset warning lights, replace fuel filter, fix auto body and more. Get Automotix DIY!Select Section
- Component Locations
- Wiring Diagrams
- Technical Service Bulletins
- Specifications
- A/C & Heater Service
- Brake Service
- Fuel Filter Replacement
- Driveline, U-Joint & CV Axles Replacement
- Tire Pressure Monitoring System
- Starter & Alternator Replacement
- Cabin Air Filter Locations & Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service
Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 2003 Infiniti Q45 car and truck
repair procedures including Infiniti engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work
guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up &
drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install
procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c
system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix
your Infiniti Q45 automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 2003 Infiniti Q45 AUTOMOBILES
Electrical Symbol & Wire Color Code Identification -> Wire Color Code Identification -> Imported Vehicles
Vehicle: 2003 Infiniti Q45 4.5 V8 GAS
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BRAKE SERVICE PROCEDURES FOR 2003 Infiniti Q45 AUTOMOBILES
Infiniti -> Power Brake Units -> Troubleshooting
Vehicle: 2003 Infiniti Q45 4.5 V8 GAS
- With engine off, depress brake pedal several times. There should be no change in pedal stroke.
- With brake pedal depressed, start engine. Pedal should go down slightly.
- Run engine for two minutes, then turn engine off.
- Depress brake pedal slowly several t...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 2003 Infiniti Q45 AUTOMOBILES
Infiniti -> Component Locations -> FX35/45, G35, I35, M35, M45, QX56 & 2002-06 Q45
Vehicle: 2003 Infiniti Q45 4.5 V8 GAS
The fuel filter is ...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 Infiniti Q45 AUTOMOBILES
DRIVESHAFT, Replace -> Front
Vehicle: 2003 Infiniti Q45 4.5 V8 GAS
Front
- Place vehicle in neutral and release parking brake.
- Raise vehicle off ground and support it with safety stands in proper locations.
- Remove exhaust front tube and center muffler.
- Remove floor reinforcement.
- Loosen center bearing bracket nuts. Do not remove center bearing bracket nuts.
- Mark companion flange on front drive. Its recommended to use paint for refere...
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TIRE PRESSURE MONITORING SYSTEM PROCEDURES FOR 2003 Infiniti Q45 AUTOMOBILES
Description
Vehicle: 2003 Infiniti Q45 4.5 V8 GAS
The TPMS (Tire Pressure Monitor System) is controlled by the TPMS control unit. The TPMS control unit receives a pressur...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2003 Infiniti Q45 AUTOMOBILES
Starter, Replace
Vehicle: 2003 Infiniti Q45 4.5 V8 GAS
- Disconnect battery ground cable.
- Remove steering gear and linkage assembly.
- Disconnect starter motor electrical connector.
- Remove mounting bolts ...
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CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES FOR 2003 Infiniti Q45 AUTOMOBILES
Cabin Air Filter Service -> Infiniti -> 2002-06 Q45 & 2003-04 M45
Vehicle: 2003 Infiniti Q45 4.5 V8 GAS
Under normal operating conditions the cabin air filter should be replaced every 12 months or 15,000 miles. In dusty areas change the cabin air filter more often.
- Open the glove compartment.
- Pull the glove compartment strap damper clips to the righthand to remove, Fig. .
- Disconnect glove compartment strap clips.
- Remove the glove compartment retaining pins, then the glove compartment.
- Remove the glove compartment striker retaining screws.
- Disconnect the elect...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2003 Infiniti Q45 AUTOMOBILES
Infiniti -> Four Wheel Drive (4WD) Warning Lamp ->
Vehicle: 2003 Infiniti Q45 4.5 V8 GAS
When the ignition switch is placed in the on position, the 4WD warning lamp will light as a bulb check but should go off soon after the engine is started. If a malfunction in the 4WD ...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2003 Infiniti Q45 AUTOMOBILES
Coolant Hose, Replace -> Lower -> Upper
Vehicle: 2003 Infiniti Q45 4.5 V8 GAS
Lower
- Disconnect battery ground cable.
- Drain cooling system into a suitable container by loosening drain plug of radiator.
- Reposition hose clamp at radiator outlet.
- Remove hose from radiator.
- Reposition hose clamp at thermostat housing.
- Remove hose from thermostat housing.
- Remove hose from vehicle.
- Reverse pr...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2003 Infiniti Q45 AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2003 Infiniti Q45 4.5 V8 GAS
- Remove air duct inlet assembly and place it aside.
- Rotate or lift belt tensioner arm counterclockwise, using a suitable tool to relieve tension from drive belt. Do not rotate belt tensioner cloc...
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COMPONENT LOCATION DIAGRAMS FOR 2003 Infiniti Q45 AUTOMOBILES
Component location diagrams for most 2003 Infiniti Q45 cars and light trucks sold in the U.S. from 1990+.
 Step Lamp Component Parts & Harness Connector Location Diagram for 2003 Infiniti Q45 4.5 V8 GASComponents on diagram: |
 Door Harness Locations Diagram for 2003 Infiniti Q45 4.5 V8 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 2003 Infiniti Q45 AUTOMOBILES
OEM drawn wiring diagrams for most 2003 Infiniti Q45 cars and light trucks sold in the U.S.
 2003 Infiniti Q45 4.5 V8 GAS Wiring DiagramComponents on diagram: |
 2003 Infiniti Q45 4.5 V8 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2003 Infiniti Q45 AUTOMOBILES
OEM TSB listings for most 2003 Infiniti Q45 cars and light trucks sold in the U.S. from 1985+.
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Document: INTELLIGENT KEY BATTERY REPLACEMENT AND BATTERY DISCHARGE INDICATOR RESET Vehicle: 2003 Infiniti Q45 4.5 V8 GAS Auto Systems: |
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Document: A/C System O-Ring Seal Leaks Vehicle: 2003 Infiniti Q45 4.5 V8 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2003 Infiniti Q45 AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2003 Infiniti Q45 cars and light trucks sold in the U.S. and Canada from 1970+.
- Brake caliper mounting bolt torque
- Brake drum runout, machining, & discard specs
- Minimum brake lining thickness.
- Brake rotor runout, parallelism, machining, discard, & finish specs
A/C SYSTEM SPECIFICATIONS: Air conditioning refrigerant capacity and type as well as lubricant capacity for most 2003 Infiniti Q45 cars and light trucks sold in the U.S. and Canada from 1980+.
- Refrigerant capacity & type, compressor oil viscosity, total system oil capacity & compressor clutch gap
COOLING SYSTEM BLEED: Cooling system bleeder valve identification, bleeder type and bleed procedures for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1986+.
PREVENTIVE MAINTENANCE: Preventive maintenance recommendations and required services for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1980+. Includes severe and routine service schedules
QUICK-LUBE and ILLUSTRATIONS: Fluid recommendations, capacities, drain plug torques, tire data, and severe service recommended preventive maintenance schedules. Information covers most 2003 Infiniti Q45 cars and light trucks sold in the U.S. and Canada from 1980+. Engine and chassis service images.
- Automatic transmission/transaxles capacities, lubricant recommendations
- Differential/final drive capacities, lube recommendations, grades, & viscosities
- Final drive fill & drain plug torques
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Manual transmission/transaxle capacities, lube recommendations, grades, & viscosities
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Engine oil capacities, API grade recommendations, SAE viscosity recommendations, drain plug torque
- Severe service maintenance & interval recommendations
- Tire sizes, wheel nut/bolt torque, pressures & rim sizes
- Transfer case capacities, lube recommendations, grades, & viscosities
TUNE-UP & DRIVEABILITY SPECIFICATIONS: Most tune-up specifications for most 2003 Infiniti Q45 cars and light trucks sold in the U.S. and Canada from 1980+
- Airflow sensor electrical specifications
- Tensioning specifications for systems with automatic tensioners
- Barometric pressure sensor specs
- Battery group number and cranking performance
- Crankshaft & camshaft position sensor resistance
- Engine compression pressures
- Coolant temperature sensor specs
- Computer advance.
- Diesel fuel temperature sensor resistance.
- Distributor advance specifications
- Ignition pickup coil resistance
- Exhaust gas recirculation temperature sensor resistance
- Engine fastener torque values
- Firing order diagrams
- Fuel system pressures
- Generator (alternator) specs
- Intake air temperature sensor specs
- Ignition coil specifications
- Fuel injector resistance
- Engine idle speeds
- Knock sensor resistance
- Manifold absolute pressure sensor specs
- Mixture control solenoid resistance
- Voltage regulator specs
- Spark plug applications & gaps
- Starter motor electrical specs.
- Tensioning specifications for systems without automatic tensioners
- Throttle body temperature sensor resistance
- Ignition timing in degrees at rpm
- Transmission oil temperature sensor resistance
- Throttle position sensor specs
- Vacuum sensor valve specs
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