Toyota Sienna (2019 – 2020) Fuse Box Location and Diagrams
Navigating the electrical system of your 2019–2020 Toyota Sienna is essential for quick, effective DIY repairs. This guide provides clear, accurate fuse box locations and comprehensive, easy-to-read diagrams to help you identify and resolve electrical issues with confidence, saving you both valuable time and expensive dealership visits.
Fuse Box Location
Engine Compartment Fuse Box
Push the tab in and lift the lid off
Passenger Compartment Fuse Box
Remove the lid.
Fuse Box Diagrams
Engine Compartment Fuse Box
Toyota Sienna (2019 – 2020)
| Type | No. | Description | Controlled Systems |
| MINI | 1 | RAD NO.1 | Audio system |
| MINI | 2 | DOME | Dome light and interior light |
| MINI | 3 | ECU-B | Engine control unit |
| MINI | 4 | SHORT PIN | Short circuit pin/jumper connection |
| MINI | 5 | EFI MAIN | Multiport fuel injection system |
| MINI | 6 | A/F | Air fuel ratio sensor |
| MINI | 7 | S-HORN | Horn / anti-theft deterrent |
| MINI | 8 | HORN | Horn |
| MINI | 9 | EFI NO.2 | Multiport fuel injection system |
| MINI | 10 | ECU-B NO.2 / AMP NO.1 | Varies by production date |
| MINI | 11 | AM2 NO.2 | Starter system |
| MINI | 12 | SMART | Smart key system |
| MINI | 13 | AMP / ECU-B NO.2 | Varies by production date |
| MINI | 14 | IG2-MAIN | Protects several circuits |
| MINI | 15 | STRG LOCK / AMP NO.2 | Varies by production date |
| MINI | 16 | RSE / DCM | Varies by production date |
| MINI | 17 | HAZ | Hazard light |
| MINI | 18 | ETCS | Electronic throttle control system |
| MINI | 19 | LED DRL | Daytime running lights |
| MINI | 20 | D INJ | Direct injection |
| MINI | 21 | DEICER | Deicer or defroster |
| MINI | 22 | INV | Power outlet (DC/AC inverter) |
| MINI | 23 | FOG FR | Front fog lights |
| MINI | 24 | P/OUTLET MAIN | Cigar lighter / power outlet |
| MINI | 25 | MIR HTR | Mirror heater |
| MINI | 26 | A/C MG | Air conditioning |
| MINI | 27 | MIRROR | Power control mirror |
| MPF2 | 28 | DRL | Daytime running lights |
| MPF2 | 29 | AM2 / STRG LOCK | Varies by production date |
| MPF2 | 30 | VSC NO.1 | Vehicle stability control |
| MPF2 | 31 | VSC NO.2 | Vehicle stability control |
| MPF2 | 32 | ST | Starter system |
| MPF2 | 33 | H-LP MAIN | Headlights |
| MPF2 | 34 | A/C RR | Rear air conditioning system |
| MPF2 | 35 | PSD RH | Power sliding door |
| MPF2 | 36 | PBD | Power back door |
| MPF2 | 37 | HTR | Air conditioning system |
| MPF2 | 38 | A/A SEAT / PSB | Varies by package |
| MPF2 | 39 | FOLD SEAT | Foldable seats |
| FLF/PAL | 40 | EPS | Electric power steering |
| FLF/PAL | 41 | ALT | Battery and charging system |
| FLF/PAL | 42 | J/B-ALT | Junction block – alternator |
| FMX | 43 | PSD LH | Power sliding door |
| FMX | 44 | DEF | Rear window defogger |
| MPF2 | 45 | PTC HTR NO.3 | Additional heater |
| MPF2 | 46 | PTC HTR NO.2 | Additional heater |
| MPF2 | 47 | PTC HTR NO.1 | Additional heater |
| FLF/PAL | 48 | FAN | Electric cooling fan |
| MINI | 49 | STRG LOCK NO.2 | Steering lock |
| MINI | 50 | IGN | Ignition |
| MINI | 52 | H-LP LH HI | Left-hand headlight high beam |
| MINI | 53 | H-LP RH HI | Right-hand headlight high beam |
| MINI | 54 | DSS1 / RSE | Varies by production date |
| MINI | 55 | H-LP LVL | Headlights low beam |
| MINI | 56 | INJ | Fuel injectors |
| MINI | 57 | ST NO.2 | Starter system |
| MINI | 58 | H-LP LH | Halogen or HID headlight |
| MINI | 59 | H-LP RH | Halogen or HID headlight |
| MINI | 60 | EFI MAIN NO.2 | Multiport fuel injection system |
Engine Compartment Relay Reference
Passenger Compartment Fuse Box
Toyota Sienna (2019 – 2020)
