Understanding the fuse box in your 2013 Toyota Corolla is essential for diagnosing and resolving electrical issues. Fuses protect your vehicle’s electrical circuits from overloads, and knowing their location and function can save you time and money on repairs. This guide will help you locate the fuse boxes in your 2013 Toyota Corolla, understand their diagrams, and even touch upon how they relate to your OBD2 port.
Your 2013 Toyota Corolla is equipped with two main fuse boxes. These are strategically placed to manage different electrical systems throughout your vehicle. Knowing where each is located and what it controls is the first step in any electrical troubleshooting process, especially when dealing with issues that might affect your On-Board Diagnostics II (OBD2) port.
Locating the Fuse Boxes in Your 2013 Toyota Corolla
There are two primary fuse box locations in the 2013 Toyota Corolla:
1. Engine Compartment Fuse Box
This fuse box is situated in the engine compartment, typically on the driver’s side. It houses fuses and relays that manage critical engine and vehicle functions. You’ll find fuses here for systems like the cooling fans, Anti-lock Braking System (ABS), and headlights, among others.
Engine compartment fuse box diagram for the 2013 Toyota Corolla, highlighting its location and layout.2. Instrument Panel Fuse Box (Under the Driver’s Side)
The second fuse box is located inside the car, under the driver’s side instrument panel. This box generally controls interior and accessory circuits. Fuses here manage systems like power windows, interior lights, the radio, and importantly, circuits related to the OBD2 port.
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Close-up view of the instrument panel fuse box diagram, specifically highlighting the location of the OBD fuse (Fuse number 21).
2013 Toyota Corolla Fuse Box Diagrams and Fuse List
Below are detailed diagrams and lists of the fuses found in each location. Understanding these diagrams is crucial for identifying the correct fuse to check or replace when troubleshooting electrical problems.
Engine Compartment Fuse Box Diagram and Fuse List
This table outlines the fuses and relays located in the engine compartment fuse box of your 2013 Toyota Corolla.
| Type | No. | Description |
|---|---|---|
| Multi fuse block MUSB | 1 | (CDS FAN) Electric cooling fan(s) |
| Multi fuse block MUSB | 2 | (RDI FAN) Electric cooling fan(s) |
| Multi fuse block MUSB | 3 | (ABS NO. 3) Anti-lock brake system, vehicle stability control system |
| Multi fuse block MUSB | 4 | (ABS NO. 1) Anti-lock brake system, vehicle stability control system |
| Multi fuse block MUSB | 5 | (HTR) Air conditioning system |
| Multi fuse block MUSB | 6 | (ALT) Charging system, RDI FAN, ABS NO. 1, ABS NO. 3, HTR, HTR SUB NO. 1, HTR SUB NO. 3, ACC, CIG, ECU-IG NO. 2, HTR-IG, WIPER, WASHER, ECU-IG NO. 1, AM1, DOOR, STOP, FR DOOR, POWER, RR DOOR, RL DOOR, OBD, ACC-B, FR FOG, DEF, MIR HTR, TAIL, PANEL, PWR SEAT, SUNROOF |
| Multi fuse block MUSB | 7 | (EPS) Electric power steering |
| Multi fuse block MUSB | 8 | (GLOW) No circuit [If equipped] |
| Multi fuse block MUSB | 9 | (P/I) EFI MAIN HORN 1IG2 |
| Multi fuse block MUSB | 10 | (H-LP MAIN) H-LP LH LO, H-LP RH LO. H-LP LH HI, H-LP RH HI |
| Fuse MICRO2 10A | 11 | (EFI NO. 2) Emission control system |
| Fuse MICRO2 10A | 12 | (EFI NO. 1) Multiport fuel injection system/ sequentia multiport fuel injection system |
| Fuse MICRO2 10A | 13 | (H-LP RH HI) Right-hand headlight (high beam) |
| Fuse MICRO2 10A | 14 | (H-LP LH HI) Left-hand headlight (high beam) |
| Fuse MICRO2 10A | 15 | (H-LP RH LO) Right-hand headlight (low beam) |
| Fuse MICRO2 10A | 16 | (H-LP LH LO) Left-hand headlight (low beam) |
| Fuse MICRO2 10A | 17 | (ETCS) Electronic throttle control system |
| Fuse MICRO2 10A | 18 | (TURN-HAZ) Turn signa lights, emergency flashers |
| Fuse MICRO2 7.5A | 19 | (ALT-S) Charging system |
| Fuse MICRO2 7.5A | 20 | (AM2 NO. 2) Multiport fuel injection system/ sequentia multiport fuel injection system starting system |
| Fuse MICRO2 30A | 21 | (AM2) Starting system |
| Fuse MICRO2 20A | 22 | (STRG LOCK) Steering lock system |
| Fuse MICRO2 7.5A | 23 | (1G2 NO.2) Starting system |
| Fuse MICRO2 10A | 24 | (ECU-B2) Air conditioning system |
| Fuse MICRO2 10A | 25 | (ECU-B) Main body ECU gauge and meters, clock |
| Fuse MICRO2 15A | 26 | (RAD NO. 1) Audio system |
| Fuse MICRO2 10A | 27 | (DOME) Trunk light, smart key system, interior light |
| Fuse MICRO2 30A | 28 | (AMP) Audio system [If equipped] |
| Fuse MICRO2 10A | 29 | (MAYDAY) No circuit [If equipped] |
| Fuse MICRO2 10A | 30 | (SPARE) Spare fuse |
| Fuse MICRO2 30A | 31 | (SPARE) Spare fuse |
| Fuse MICRO2 20A | 32 | (SPARE) Spare fuse |
| Fuse MICRO2 20A | 33 | (EFI MAIN) Multiport fuel injection system/ sequential multiport fue injection system, EFI NO. 1. EFI NO. 2 |
| Fuse MICRO2 10A | 34 | (HORN) Horn |
| Fuse MICRO2 15A | 35 | (IG2) Multiport fuel injection system/ sequential multiport fuel injection system, starting system, IGN METER |
| Fuse MICRO2 7.5A | 36 | (ST) No circuit [If equipped] |
| Fuse FMX/JCase 30A | 37 | (HTR SUB NO. 1) PTC heater |
| Fuse FMX/JCase 30A | 38 | (HTR SUB NO. 3) PTC heater |
| Fuse MICRO2 15A | 39 | Power Outlet / Inverter |
| Relay | U6 | Fan #3 |
| Relay | U7 | Fan #1 |
| Relay | U9 | Fan #2 |
| Relay | U10 | Dimmer |
| Relay | U11 | H-LP |
| Fuse MINI | U22 | (SHORT) – D.C.C. |
| Relay | U25 | HTR SUB NO. 3 |
| Relay | U26 | HTR SUB NO. 1 |
Instrument Panel Fuse Box Diagram and Fuse List
This table details the fuses located under the driver’s side instrument panel in your 2013 Toyota Corolla. Notably, you will find the OBD fuse listed here.
| Type | No. | Description |
|---|---|---|
| Fuse FMX/JCase 40A | 1 | (DEF) Rear window defogger, MIR HTR |
| Fuse FMX/JCase 30A | 2 | (PWR SEAT) Power seat |
| Fuse MINI 10A | 3 | (TAIL) Parking lights, tail lights, license plate lights, fron side marker lights, multiport fue injection system/ sequential multiport fuel injection system, instrument cluster lights |
| Fuse MINI 7.5A | 4 | (PANEL) Switch illumination |
| Fuse MINI 20A | 5 | (FR DOOR) Power windows. moon roof |
| Fuse MINI 20A | 6 | (RL DOOR) Power windows |
| Fuse MINI 20A | 7 | (RR DOOR) Power windows |
| Fuse MINI 20A | 8 | (SUNROOF) Moon roof |
| Fuse MINI 15A | 9 | (CIG) Cigarette lighter |
| Fuse MINI 7.5A | 10 | (ACC) Outside rear view mirrors, audio system main body ECU |
| Fuse MINI 10A | 11 | (MIR HTR) Outside rear view mirror defogger |
| Fuse MINI 7.5A | 12 | (IGN) Steering lock system, SRS airbag system, multiport fue injection system/sequentia multiport fuel injection system, front passenger occupant classification system |
| Fuse MINI 7.5A | 13 | (METER) Gauge and meters |
| Fuse FMX/JCase 30A | 14 | (POWER) Power windows |
| Fuse MINI 15A | 15 | (SEAT HTR) Seat heater |
| Fuse MINI 10A | 16 | (HTR-IG) Air conditioning system |
| Fuse MINI 25A | 17 | (WIPER) Windshield wipers |
| Fuse MINI 15A | 18 | (WASHER) Windshield washer |
| Fuse MINI 10A | 19 | (ECU-IG NO. 1) Automatic transmission, main body ECU, electric power steering, electric cooling fan(s), shift lock control system, anti-lock brake system, tire pressure warning system, vehicle stability control system, cruise control system |
| Fuse MINI 10A | 20 | (ECU-IG NO. 2) Back-up lights, charging system, rear window defogger, air conditioning system, multiport fue injection system/sequential multiport fuel injection system, moon roof |
| Fuse MINI 7.5A | 21 | (OBD) On-board diagnosis system |
| Fuse MINI 10A | 22 | (STOP) Stop lights, high mounted stoplight, anti-lock brake system, main body ECU, multiport fuel injection system/sequential multiport fuel injection system, shift lock control system, vehicle stability control system |
| Fuse MINI 25A | 23 | (DOOR) Power door lock system |
| Fuse MINI 25A | 24 | (ACC-B) CIG ACC |
| Fuse MINI 15A | 25 | (FR FOG) Front fog lights |
| Fuse MINI 7.5A | 26 | (AM1) Starting system, ACC. CIG |
The OBD2 Fuse and Diagnostic Port
The On-Board Diagnostics II (OBD2) port is a crucial interface in your 2013 Toyota Corolla, allowing mechanics and car owners to retrieve diagnostic information from the vehicle’s computer system. If you are experiencing issues connecting to your OBD2 port with a scan tool, one of the first things to check is the “OBD” fuse.
In the instrument panel fuse box, you will find a fuse labeled “OBD” (Number 21). This fuse is specifically dedicated to the OBD system. A blown OBD fuse is a common reason why a scan tool might fail to connect or power on when plugged into the OBD2 port.
[Close-up view of the instrument panel fuse box diagram, specifically highlighting the location of the OBD fuse (Fuse number 21).
Troubleshooting OBD2 Port Issues:
- Locate the Instrument Panel Fuse Box: As described earlier, it’s under the driver’s side dashboard.
- Identify the “OBD” Fuse: Refer to the diagram and fuse list for the instrument panel fuse box to pinpoint fuse number 21, labeled “OBD.”
- Check the Fuse: Visually inspect the fuse. If the wire inside is broken or melted, the fuse is blown and needs replacement. You can also use a fuse tester for a more definitive check.
- Replace the Fuse: Use a fuse of the same type and amperage (7.5A for the OBD fuse in the 2013 Corolla).
- Test the OBD2 Port: After replacing the fuse, try connecting your OBD2 scan tool again to see if the issue is resolved.
Important Note: Always replace a blown fuse with one of the same amperage rating. Using a fuse with a higher amperage can bypass the circuit protection and potentially cause damage to electrical components.
Conclusion
Knowing the location of the fuse boxes and the function of each fuse in your 2013 Toyota Corolla is a valuable skill for any car owner. Specifically, understanding the “OBD” fuse location in the instrument panel fuse box can be particularly helpful when diagnosing issues related to your OBD2 port and ensuring your vehicle is ready for diagnostic scanning. By using these diagrams and fuse lists, you can confidently troubleshoot and resolve minor electrical issues, keeping your Toyota Corolla running smoothly.
