Wiring Diagram Cluster

2002 Infiniti Q45 Engine Management Wiring Diagram

Find ECU/PCM wiring, fuel injector circuits, ignition coil paths, and oxygen sensor schematics for engine diagnostics.

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Matched Diagrams

48

Variant Used

Q45 V8-4.5L (VK45DE)

Total Vehicle Diagrams

1430

From Diagram To Fix

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Spark Plug ReplacementOil Change2002 Infiniti Q45 A L L Diagnostic Trouble Codes ( DTC )

Likely fix path

Exact Repair Guides

These repair flows most often intersect with engine management diagnosis on this exact vehicle.

Spark Plug Replacement →
Oil Change

Diagnostic signal

Codes Often Seen With This System

Use the code cluster when wiring faults overlap with check-engine or module-level diagnostics.

P0301: Cylinder 1 Misfire Detected →
P0030: HO2S Heater Control Circuit (Bank 1, Sensor 1)P0300: Random/Multiple Cylinder Misfire DetectedP0351: Ignition Coil A Primary/Secondary Circuit

Top Engine Management Diagram Paths

1.Connector Views > Computers and Control Systems > Engine Control Module > ECM Terminals and Reference ValueGeneralOpen2.Electrical Diagrams > Diagrams By Diagram Name > EC Diagrams (Engine Control System) > EC-ECM/PWGeneralOpen3.Electrical Diagrams > Diagrams By Diagram Name > EC Diagrams (Engine Control System) > EC-FPCMGeneralOpen4.Electrical Diagrams > Powertrain Management > Electronic Throttle ActuatorGeneralOpen5.Electrical Diagrams > Powertrain Management > Electronic Throttle Actuator RelayGeneralOpen6.Electrical Diagrams > Powertrain Management > Engine Control ModuleGeneralOpen7.Electrical Diagrams > Powertrain Management > Fuel Delivery and Air Induction > Fuel InjectorGeneralOpen8.Electrical Diagrams > Powertrain Management > Oxygen Sensor > EC-O2H1B1GeneralOpen9.Electrical Diagrams > Powertrain Management > Oxygen Sensor > EC-O2H1B2GeneralOpen10.Electrical Diagrams > Powertrain Management > Oxygen Sensor > EC-O2H2B1GeneralOpen11.Electrical Diagrams > Powertrain Management > Oxygen Sensor > EC-O2H2B2GeneralOpen12.Electrical Diagrams > Powertrain Management > Oxygen Sensor > EC-O2S1B1GeneralOpen13.Electrical Diagrams > Powertrain Management > Oxygen Sensor > EC-O2S1B2GeneralOpen14.Electrical Diagrams > Powertrain Management > Oxygen Sensor > EC-O2S2B1GeneralOpen15.Electrical Diagrams > Powertrain Management > Oxygen Sensor > EC-O2S2B2GeneralOpen16.Electrical Diagrams > Powertrain Management > System Diagram > Engine Control System DiagramGeneralOpen17.Electrical Diagrams > Powertrain Management > System Diagram > Engine Control System SchematicGeneralOpen18.Electrical Diagrams > Powertrain Management > Throttle Position SensorGeneralOpen19.Electrical Diagrams > Engine Control System DiagramPowertrain ManagementOpen20.Electrical Diagrams > Engine Control System SchematicPowertrain ManagementOpen21.Engine — DiagramEngine, Cooling and ExhaustOpen22.Engine > Cylinder Block Assembly — DiagramEngine, Cooling and ExhaustOpen23.Engine > Cylinder Head Assembly — DiagramEngine, Cooling and ExhaustOpen24.Engine > Engine Lubrication — Exploded ViewsEngine, Cooling and ExhaustOpen25.Engine > Engine Lubrication — Fluid DiagramsEngine, Cooling and ExhaustOpen26.Engine > Engine Lubrication > Oil Pump — DiagramEngine, Cooling and ExhaustOpen27.Engine > Tune-up and Engine Performance Checks > Air Cleaner Housing — DiagramEngine, Cooling and ExhaustOpen28.Engine > Water Pump — DiagramEngine, Cooling and ExhaustOpen29.Fuel Delivery and Air Induction > Fuel Injector — Connector ViewsPowertrain ManagementOpen30.Fuel Delivery and Air Induction > Fuel Injector — Diagnostic Aids > CONSULT-II Checking SystemPowertrain ManagementOpen31.Fuel Delivery and Air Induction > Fuel Injector — Diagnostic Aids > Ground InspectionPowertrain ManagementOpen32.Fuel Delivery and Air Induction > Fuel Injector — Diagnostic Aids > How to Check TerminalsPowertrain ManagementOpen33.Fuel Delivery and Air Induction > Fuel Injector — Diagnostic Aids > How to Follow/Perform Trouble DiagnosisPowertrain ManagementOpen34.Fuel Delivery and Air Induction > Fuel Injector — Diagnostic Aids > How to Perform Electrical Incident Simulation TestsPowertrain ManagementOpen35.Fuel Delivery and Air Induction > Fuel Injector — Diagnostic Aids > Key to Symbols Signifying Measurements or ProceduresPowertrain ManagementOpen36.Fuel Delivery and Air Induction > Fuel Injector — Diagnostic Aids > Work FlowPowertrain ManagementOpen37.Fuel Delivery and Air Induction > Fuel Injector — Diagram Information and Instructions > Harness Connector DescriptionPowertrain ManagementOpen38.Fuel Delivery and Air Induction > Fuel Injector — Diagram Information and Instructions > How To Read Harness LayoutPowertrain ManagementOpen39.Fuel Delivery and Air Induction > Fuel Injector — Diagram Information and Instructions > How to Read Relay DiagramsPowertrain ManagementOpen40.Fuel Delivery and Air Induction > Fuel Injector — Diagram Information and Instructions > How to Read Wiring DiagramsPowertrain ManagementOpen41.Fuel Delivery and Air Induction > Fuel Injector — Diagram Information and Instructions > Key to Symbols Used In IllustrationsPowertrain ManagementOpen42.Fuel Delivery and Air Induction > Fuel Injector — Diagram Information and Instructions > Wire Color Code IdentificationPowertrain ManagementOpen43.Fuel Delivery and Air Induction > Fuel Injector — Diagram Information and Instructions > Wiring Diagram CodesPowertrain ManagementOpen44.Fuel Delivery and Air Induction > Fuel Injector — Electrical DiagramsPowertrain ManagementOpen45.Fuel Delivery and Air Induction > Fuel Injector — Exploded ViewsPowertrain ManagementOpen46.Tune-up and Engine Performance Checks > Air Cleaner Housing — DiagramPowertrain ManagementOpen47.Connector Views > Computers and Control Systems > Electronic Throttle ActuatorGeneralOpen48.Connector Views > Computers and Control Systems > Electronic Throttle Actuator RelayGeneralOpen

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OEM Manual Evidence

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2002 Infiniti Q45 A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 2002 Infiniti Q45 V8-4.5L (VK45DE) Service Manual | Operation CHARM Operation CHARM : Car repair m...

2002 Infiniti Q45 How to Find Technical Service Bulletins by Category/SymptomOEM Manual

How to Find Technical Service Bulletins by Category/Symptom — 2002 Infiniti Q45 V8-4.5L (VK45DE) Service Manual | Operation CHARM Operation...

2002 Infiniti Q45 Application and IDOEM Manual

Repair and Diagnosis: Application and ID — 2002 Infiniti I35 V6-3.5L (VQ35DE) Service Manual | Operation CHARM Operation CHARM : Car repair...

2002 Infiniti Q45 A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 2002 Infiniti G20 L4-2.0L (SR20DE) Service Manual | Operation CHARM Operation CHARM : Car repair m...

Repairs That Intersect This Wiring

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2002 Infiniti Q45 Spark Plug ReplacementRepair

Open the matching repair workflow that usually intersects with engine management diagnosis on this vehicle.

2002 Infiniti Q45 Oil ChangeRepair

Open the matching repair workflow that usually intersects with engine management diagnosis on this vehicle.

Likely Trouble Codes for This System

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P0301: Cylinder 1 Misfire DetectedCode

Ignition code commonly seen during engine management diagnosis.

P0030: HO2S Heater Control Circuit (Bank 1, Sensor 1)Code

Emissions code commonly seen during engine management diagnosis.

P0300: Random/Multiple Cylinder Misfire DetectedCode

Ignition code commonly seen during engine management diagnosis.

P0351: Ignition Coil A Primary/Secondary CircuitCode

Ignition code commonly seen during engine management diagnosis.

P0352: Ignition Coil B Primary/Secondary CircuitCode

Ignition code commonly seen during engine management diagnosis.

P0353: Ignition Coil C Primary/Secondary CircuitCode

Ignition code commonly seen during engine management diagnosis.

More Q45 Wiring Pages

Starter Wiring DiagramAlternator Wiring DiagramFuel Pump Wiring DiagramHeadlight Wiring DiagramABS Brake Wiring DiagramA/C & Heater Wiring DiagramPower Window Wiring DiagramInstrument Cluster Wiring DiagramWiper & Washer Wiring DiagramTransmission Wiring DiagramCruise Control Wiring DiagramAirbag SRS Wiring DiagramBody Electrical Wiring Diagram

Same System, Other Vehicles

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