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.
Engine Room Relay Block And Engine Room Junction Block
2010 Toyota Yaris 4D Sedan, StandardSECTION Engine Room Relay Block And Engine Room Junction Block
Engine Compartment Left (See Engine Compartment )
Engine Room R/B Relay Identification
| RELAY NUMBER | RELAY DESCRIPTION |
|---|---|
| *9 | Fan No. 2 Relay |
| *10 | ST Relay |
| - | HTR SUB1 Relay |
Engine Room R/B Fuse Identification Legend
| Fuse | System | |
|---|---|---|
| 7.5A | ALT-S | Charging |
| 7.5A | ECU-B | ABS (w/ VSC), TRAC and VSC |
| Combination Meter | ||
| Cruise Control | ||
| Door Lock Control | ||
| Electronically Controlled Transmission and A/T Indicator | ||
| Engine Control | ||
| Engine Immobiliser System | ||
| Headlight | ||
| Interior Light | ||
| Key Reminder and Light Reminder | ||
| Power Window | ||
| Seat Belt Warning | ||
| SRS | ||
| Theft Deterrent | ||
| Wireless Door Lock Control | ||
| 10A | EFI2 | Engine Control |
| 10A | ETCS | Cruise Control |
| Electronically Controlled Transmission and A/T Indicator | ||
| Engine Control | ||
| 10A | HAZ | Turn Signal and Hazard Warning Light |
| 10A | H-LP LH/H-LP LO LH | Headlight |
| Theft Deterrent | ||
| 10A | H-LP RH/H-LP LO RH | Headlight |
| 10A | HORN | Horn |
| Theft Deterrent | ||
| 15A | AM2 | Engine Control |
| Ignition | ||
| Starting | ||
| 15A | DOME | Audio System |
| Engine Control | ||
| Interior Light | ||
| Theft Deterrent | ||
| Wireless Door Lock Control | ||
| 20A | EFI | Cruise Control |
| Electronically Controlled Transmission and A/T Indicator | ||
| Engine Control | ||
| 30A | ABS2/VSC2 | ABS (w/ VSC), TRAC and VSC |
| 30A | ABS2/VSC2 | ABS (w/o VSC) |
| 30A | HTR SUB1 | Air Conditioning |
| 30A | RDI | Cooling Fan |
| 30A | ST | Starting |
| 40A | HTR | Air Conditioning |
| 40A | HTR SUB2 | Air Conditioning |
| 50A | ABS1/VSC1 | ABS (w/ VSC), TRAC and VSC |
| ABS (w/o VSC) | ||
| 50A | EPS | EPS |
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.