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1991 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
- Starter & Alternator Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service
A/C & HEATER SERVICE PROCEDURES FOR 1991 Infiniti Q45 AUTOMOBILES
Electrical Symbol & Wire Color Code Identification -> Electrical Symbol Identification -> Imported Vehicles
Vehicle: 1991 Infiniti Q45 4.5 V8 GAS
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BRAKE SERVICE PROCEDURES FOR 1991 Infiniti Q45 AUTOMOBILES
INFINITI, POWER BRAKE UNITS -> POWER BOOSTER REPLACEMENT
Vehicle: 1991 Infiniti Q45 4.5 V8 GAS
- Connect tube to bleeder valve.
- Open bleeder valve, drain fluid by depressing brake pedal until master cylinder is empty.
- Remove brake line flare nuts, then master cylinder attaching nuts.
- Remove clevis pin, Figs. and .
- Remove brake booster attaching nuts, then remove booster.
- Reverse procedure to install noting ...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1991 Infiniti Q45 AUTOMOBILES
Infiniti -> Component Locations -> 1990-01 Q45
Vehicle: 1991 Infiniti Q45 4.5 V8 GAS
Refer to Fig. ...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1991 Infiniti Q45 AUTOMOBILES
DRIVESHAFT, Replace
Vehicle: 1991 Infiniti Q45 4.5 V8 GAS
- Before removing propeller shaft, check marks on bolts to reuse them in the same position.
- Remove propeller shaft to companion flange bolts.
- If propeller shaft is replaced with a new one, replace all bolts with "9" bolts. Do not use "A", "B" or "C" bolts.
- Remove center bearing bracket m...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1991 Infiniti Q45 AUTOMOBILES
Alternator, Replace
Vehicle: 1991 Infiniti Q45 4.5 V8 GAS
- Drain approximately one liter of coolant.
- Remove radiator upper hose and radiator bracket.
- Remove radiator shroud.
- Remove cooling fan.
- Remove alternator upper bracket.
- Remove air conditioner pipe mounting bracket.
- Remove idler pulley.
- Remove drive belt.
- Remove tw...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1991 Infiniti Q45 AUTOMOBILES
Infiniti -> Maintenance Messages -> M45 & Q45
Vehicle: 1991 Infiniti Q45 4.5 V8 GAS
The Vehicle Information Display will display a maintenance notification when engine oil, oil filter and tire rotation are due. To reset maintenance message proceed as follows:
- Press INFO button on control.
- Select Maintenance on display scree...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1991 Infiniti Q45 AUTOMOBILES
Radiator, Replace
Vehicle: 1991 Infiniti Q45 4.5 V8 GAS
- Remove air guide.
- Disconnect connector from radiator upper shroud.
- Remove radiator lower shroud.
- Loosen both A/T upper oil cooler hose clamps and turn clamps to make room.
- Remove filler cap above radiator upper hose.
- Remove under cover.
- Drain engine coolant from radiator into a suitable container.
- Disconnect A/T fluid cooler hoses from radiator. Install blind plug to avoid leakage of A/T fluid.
- Remove pump accumulato...
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SERPENTINE BELT SERVICE PROCEDURES FOR 1991 Infiniti Q45 AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 1991 Infiniti Q45 4.5 V8 GAS
Avoid placing hand in a location where pinching may occur if holding tool accidentally comes off. Do not loosen hexagonal part in center of drive belt auto tensioner pulley (Do not turn it clockwise). If turned clockwise, complete drive be...
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COMPONENT LOCATION DIAGRAMS FOR 1991 Infiniti Q45 AUTOMOBILES
Component location diagrams for most 1991 Infiniti Q45 cars and light trucks sold in the U.S. from 1990+.
Luggage Compartment Component Location Diagram for 1991 Infiniti Q45 4.5 V8 GAS Components on diagram: |
Passenger Compartment Component Locations Diagram for 1991 Infiniti Q45 4.5 V8 GAS Components on diagram: |
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WIRING DIAGRAMS FOR 1991 Infiniti Q45 AUTOMOBILES
OEM drawn wiring diagrams for most 1991 Infiniti Q45 cars and light trucks sold in the U.S.
1991 Infiniti Q45 4.5 V8 GAS Wiring Diagram Components on diagram: |
1991 Infiniti Q45 4.5 V8 GAS Wiring Diagram Components on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1991 Infiniti Q45 AUTOMOBILES
OEM TSB listings for most 1991 Infiniti Q45 cars and light trucks sold in the U.S. from 1985+.
Document: A/C System O-Ring Seal Leaks Vehicle: 1991 Infiniti Q45 4.5 V8 GAS Auto Systems: |
Document: Windshield Cracking Vehicle: 1991 Infiniti Q45 4.5 V8 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1991 Infiniti Q45 AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1991 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 1991 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 1991 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 1991 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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