Toyota Prius Wiring Diagram. Fuse and Relay

The page contains detailed electrical diagrams and connection diagrams for all generations of Toyota Prius. Here you will find wiring diagrams, the location of relays and fuses, as well as information on the operation of the main electronic systems of a hybrid car. The manual will help in diagnosing faults, repairing electrical equipment and finding the causes of errors.

Prius (EM3212E) Overall Electrical Wiring Diagram Download

Prius (EM3212E) Relay Locations Download

Prius (EM3212E) Electrical Wire Routing Download

Prius (EM3212E) System Wiring Diagram Download

Prius Plug-in Hybrid (EM2222E) Overall Electrical Wiring Diagram Download

Prius Plug-in Hybrid (EM2222E) Relay Locations Download

Prius Plug-in Hybrid (EM2222E) Electrical Wire Routing Download

Prius Plug-in Hybrid (EM2222E) System Wiring Diagram Download

PRIUS + / PRIUS V / PRIUS EM2077E Overall Electrical Wiring Diagram Download

PRIUS + / PRIUS V / PRIUS EM2077E Relay Locations Download

Prius PHV ZVW52L, ZVW52R EM32E1E Overall Electrical Wiring Diagram Download

Prius PHV ZVW52L, ZVW52R EM32E1E Relay Locations Download

Prius PHV ZVW52L, ZVW52R EM32E1E Electrical Wire Routing Download

Prius PHV ZVW52L, ZVW52R EM32E1E System Wiring Diagram Download

Prius / ZVW30 / 2XR-FXE ZVW30. 2XR-FXE. EM12A6E Overall Electrical Wiring Diagram Download

Prius / ZVW30 / 2XR-FXE ZVW30. 2XR-FXE. EM12A6E Overall Relay Locations Download

Prius / ZVW30 / 2XR-FXE ZVW30. 2XR-FXE. EM12A6E Overall Electrical Wire Routing Download

Prius / ZVW30 / 2XR-FXE ZVW30. 2XR-FXE. EM12A6E Overall System Wiring Diagram Download

🔋 Battery and hybrid battery

Fast discharge of 12V battery (often due to current leakage or old battery).

Problems with hybrid HV battery (cell degradation, errors P0A80, P3000).

Oxidation of contacts in battery connectors.

💡 Lighting and body electrics

Burning of connectors and wiring of low beam headlights.

Malfunctions of rear lights due to overheating of contacts.

Blown fuses in lighting circuits.

🧩 Wiring and connectors

Chafing of harnesses under the hood and near the trunk.

Damage to the cable to the electric motor and inverter (especially on old Prius).

Poor ground contact → chaotic errors on the instrument panel.

🖥️ Electronic units

Inverter failures (DC-DC converter), errors P0A94.

Problems with the Smart Key (SKS) unit → the car does not respond to the "Start" button.

ABS/VSC errors due to damaged sensors and wiring.

🌡️ Electrical cooling systems

Failure of the hybrid battery cooling fan (clogged with dust, hair, wool).

Inverter overheating due to problems with the cooling pump.