Wiring Diagram Cluster

1991 Toyota MR2 Body Electrical Wiring Diagram

Find body control module wiring, door lock circuits, interior lighting paths, and horn/alarm schematics.

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Matched Diagrams

34

Variant Used

MR2 L4-122 1998cc 2.0L DOHC Turbo (3S-GTE)

Total Vehicle Diagrams

213

From Diagram To Fix

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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.

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Diagnostic signal

Codes Often Seen With This System

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

B1318: Battery Voltage Low →
U0140: Lost Communication with Body Control Module

Top Body Electrical Diagram Paths

1.Horn — Diagram Information and Instructions > Symbol IdentificationLighting and HornsOpen2.Horn — Diagram Information and Instructions > Wire Color Code IdentificationLighting and HornsOpen3.Horn — Electrical DiagramsLighting and HornsOpen4.Connectors > BodyGeneralOpen5.Electrical Diagrams > Lighting and Horns > HornGeneralOpen6.Electrical Diagrams > Lighting and Horns > System Diagram > Lamps > Back-UpGeneralOpen7.Electrical Diagrams > Lighting and Horns > System Diagram > Lamps > Fog > CanadaGeneralOpen8.Electrical Diagrams > Lighting and Horns > System Diagram > Lamps > Fog > USAGeneralOpen9.Electrical Diagrams > Lighting and Horns > System Diagram > Lamps > Headlamps > CanadaGeneralOpen10.Electrical Diagrams > Lighting and Horns > System Diagram > Lamps > Headlamps > USAGeneralOpen11.Electrical Diagrams > Lighting and Horns > System Diagram > Lamps > IlluminationGeneralOpen12.Electrical Diagrams > Lighting and Horns > System Diagram > Lamps > InteriorGeneralOpen13.Electrical Diagrams > Lighting and Horns > System Diagram > Lamps > StopGeneralOpen14.Electrical Diagrams > Lighting and Horns > System Diagram > Lamps > TailGeneralOpen15.Electrical Diagrams > Lighting and Horns > System Diagram > Lamps > Turn SignalGeneralOpen16.Electrical Diagrams > Lighting and Horns > System Diagram > Lights Auto Turn OffGeneralOpen17.Grounds > BodyGeneralOpen18.Splices > BodyGeneralOpen19.Diagram Information and Instructions > Symbol IdentificationLighting and HornsOpen20.Diagram Information and Instructions > Wire Color Code IdentificationLighting and HornsOpen21.Electrical Diagrams > Lamps > Back-UpLighting and HornsOpen22.Electrical Diagrams > Lamps > Fog > CanadaLighting and HornsOpen23.Electrical Diagrams > Lamps > Fog > USALighting and HornsOpen24.Electrical Diagrams > Lamps > Headlamps > CanadaLighting and HornsOpen25.Electrical Diagrams > Lamps > Headlamps > USALighting and HornsOpen26.Electrical Diagrams > Lamps > IlluminationLighting and HornsOpen27.Electrical Diagrams > Lamps > InteriorLighting and HornsOpen28.Electrical Diagrams > Lamps > StopLighting and HornsOpen29.Electrical Diagrams > Lamps > TailLighting and HornsOpen30.Electrical Diagrams > Lamps > Turn SignalLighting and HornsOpen31.Electrical Diagrams > Lights Auto Turn OffLighting and HornsOpen32.Locks — Diagram Information and Instructions > Symbol IdentificationBody and FrameOpen33.Locks — Diagram Information and Instructions > Wire Color Code IdentificationBody and FrameOpen34.Locks — Electrical DiagramsBody and FrameOpen

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Likely Trouble Codes for This System

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B1318: Battery Voltage LowCode

Body/Electrical code commonly seen during body electrical diagnosis.

U0140: Lost Communication with Body Control ModuleCode

Network/Communication code commonly seen during body electrical diagnosis.

More MR2 Wiring Pages

Starter Wiring DiagramAlternator 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 DiagramEngine Management Wiring Diagram

Same System, Other Vehicles

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