Wiring Diagram Cluster

1988 Plymouth Horizon 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

Horizon L4-135 2.2L SOHC VIN C

Total Vehicle Diagrams

158

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1988 Plymouth Horizon A L L Diagnostic Trouble Codes ( DTC )

OEM source

Factory Manual Evidence

When there is no clean repair shortcut for this system, drop into the OEM manual sections that usually carry the authoritative test path.

1988 Plymouth Horizon A L L Diagnostic Trouble Codes ( DTC ) →
1988 Plymouth Horizon A L L Diagnostic Trouble Codes ( DTC )1988 Plymouth Horizon Application and ID1988 Plymouth Horizon Application and ID

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 > Powertrain Management > Engine Control Module > 14-Way EngineGeneralOpen2.Connector Views > Powertrain Management > Engine Control Module > 60-Way EngineGeneralOpen3.Connector Views > Powertrain Management > System Diagram > 14-Way EngineGeneralOpen4.Connector Views > Powertrain Management > System Diagram > 60-Way EngineGeneralOpen5.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Engine Control ModuleGeneralOpen6.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Oxygen SensorGeneralOpen7.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Throttle Position SensorGeneralOpen8.Connector Views > 14-Way EnginePowertrain ManagementOpen9.Connector Views > 60-Way EnginePowertrain ManagementOpen10.Engine > Engine Lubrication — DiagramEngine, Cooling and ExhaustOpen11.Connector Views > Bulkhead Connector > Engine Compartment SideGeneralOpen12.Electrical Diagrams > A/C & Heater (Engine Compartment)Heating and Air ConditioningOpen13.Electrical Diagrams > Heating and Air Conditioning > A/C & Heater (Engine Compartment)GeneralOpen14.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Body Control ModuleGeneralOpen15.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Camshaft Position SensorGeneralOpen16.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Crankshaft Position SensorGeneralOpen17.Electrical Diagrams > Powertrain Management > Computers and Control Systems > System DiagramGeneralOpen18.Electrical Diagrams > Powertrain Management > Computers and Control Systems > Vehicle Speed SensorGeneralOpen19.Electrical Diagrams > Powertrain Management > Emission Control SystemsGeneralOpen20.Electrical Diagrams > Powertrain Management > Fuel Delivery and Air Induction > CarburetorGeneralOpen21.Electrical Diagrams > Powertrain Management > Fuel Delivery and Air Induction > Fuel PumpGeneralOpen22.Electrical Diagrams > Powertrain Management > Fuel Delivery and Air Induction > System Diagram > Complete System DiagramGeneralOpen23.Electrical Diagrams > Powertrain Management > Fuel Delivery and Air Induction > System Diagram > Fuel Tank System Wiring CircuitGeneralOpen24.Electrical Diagrams > Powertrain Management > Ignition System > Ignition Control ModuleGeneralOpen25.Electrical Diagrams > Powertrain Management > Ignition System > System Diagram > Complete System DiagramGeneralOpen26.Electrical Diagrams > Powertrain Management > Ignition System > System Diagram > Ignition Switch/SystemGeneralOpen27.Electrical Diagrams > Powertrain Management > System Diagram > Part 1GeneralOpen28.Electrical Diagrams > Powertrain Management > System Diagram > Part 2GeneralOpen29.Electrical Diagrams > Powertrain Management > System Diagram > Part 3GeneralOpen30.Electrical Diagrams > Powertrain Management > System Diagram > Part 4GeneralOpen31.Electrical Diagrams > Powertrain Management > System Diagram > Part 5GeneralOpen32.Fluid Diagrams > Engine LubricationGeneralOpen33.Splices > Engine Compartment & Front End Splice LocationsGeneralOpen34.Computers and Control Systems — Diagram Information and Instructions > How to Find System & Component DiagramsPowertrain ManagementOpen35.Computers and Control Systems — Diagram Information and Instructions > How to Use Complete Body and Chassis DiagramsPowertrain ManagementOpen36.Computers and Control Systems — Electrical DiagramsPowertrain ManagementOpen37.Cooling System — Diagram Information and Instructions > How to Find System & Component DiagramsEngine, Cooling and ExhaustOpen38.Cooling System — Diagram Information and Instructions > How to Use Complete Body and Chassis DiagramsEngine, Cooling and ExhaustOpen39.Cooling System — Electrical Diagrams > Heater OnlyEngine, Cooling and ExhaustOpen40.Cooling System — Electrical Diagrams > With Air ConditioningEngine, Cooling and ExhaustOpen41.Diagram Information and Instructions > How to Find System & Component DiagramsPowertrain ManagementOpen42.Diagram Information and Instructions > How to Use Complete Body and Chassis DiagramsPowertrain ManagementOpen43.Electrical Diagrams > Part 1Powertrain ManagementOpen44.Electrical Diagrams > Part 2Powertrain ManagementOpen45.Electrical Diagrams > Part 3Powertrain ManagementOpen46.Electrical Diagrams > Part 4Powertrain ManagementOpen47.Electrical Diagrams > Part 5Powertrain ManagementOpen48.Emission Control Systems — Diagram Information and Instructions > How to Find System & Component DiagramsPowertrain ManagementOpen

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OEM Manual Evidence

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1988 Plymouth Horizon A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 1988 Plymouth Horizon L4-135 2.2L SOHC VIN C Service Manual | Operation CHARM Operation CHARM : Ca...

1988 Plymouth Horizon A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 1988 Plymouth Horizon L4-135 2.2L SOHC VIN D Service Manual | Operation CHARM Operation CHARM : Ca...

1988 Plymouth Horizon Application and IDOEM Manual

Repair and Diagnosis: Application and ID — 1988 Plymouth Horizon L4-135 2.2L SOHC VIN C Service Manual | Operation CHARM Operation CHARM :...

1988 Plymouth Horizon Application and IDOEM Manual

Repair and Diagnosis: Application and ID — 1988 Plymouth Horizon L4-135 2.2L SOHC VIN D Service Manual | Operation CHARM Operation CHARM :...

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 Horizon Wiring Pages

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Same System, Other Vehicles

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