Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2025PRIUS PLUG-IN HYBRID XSE PREMIUMREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROL SYSTEMSENGINE CONTROL SYSTEM (SERVICE SPECIFICATIONS)M20A-FXS ENGINE CONTROLSERVICE DATA [12/2022 - ]SERVICE DATA [12/2022 - ]RELAY
2025 Toyota Prius Plug-In Hybrid XSE Premium
Service Data [12/2022 - ]: Relay
2025 Toyota Prius Plug-In Hybrid XSE PremiumSECTION Relay
RELAY
| Standard Resistance (No. 1 Electronic Fuel Injection Main Relay (EFI-MAIN NO. 1)) |
3 - 5 | Auxiliary battery voltage is not applied between terminals 1 and 2 | 10 kΩ or higher |
| Auxiliary battery voltage is applied between terminals 1 and 2 | Below 1 Ω | ||
| Standard Resistance (No. 2 Electronic Fuel Injection Main Relay (EFI-MAIN NO. 2)) |
3 - 5 | Auxiliary battery voltage is not applied between terminals 1 and 2 | 10 kΩ or higher |
| Auxiliary battery voltage is applied between terminals 1 and 2 | Below 1 Ω | ||
| Standard Resistance (No. 3 Electronic Fuel Injection Main Relay (EFI-MAIN NO. 3)) |
3 - 5 | Auxiliary battery voltage is not applied between terminals 1 and 2 | 10 kΩ or higher |
| Auxiliary battery voltage is applied between terminals 1 and 2 | Below 1 Ω | ||
| Standard Resistance (Injector Relay (D INJ)) |
3 - 5 | Auxiliary battery voltage is not applied between terminals 1 and 2 | 10 kΩ or higher |
| Auxiliary battery voltage is applied between terminals 1 and 2 | Below 1 Ω | ||
| Standard Resistance (VVT Relay (VVT)) |
3 - 5 | Auxiliary battery voltage is not applied between terminals 1 and 2 | 10 kΩ or higher |
| Auxiliary battery voltage is applied between terminals 1 and 2 | Below 1 Ω | ||
| Standard Resistance (IGP Relay (IGP)) |
3 - 5 | Auxiliary battery voltage is not applied between terminals 1 and 2 | 10 kΩ or higher |
| Auxiliary battery voltage is applied between terminals 1 and 2 | Below 1 Ω |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.