Understanding your 2012 Nissan Altima’s fuse box is essential for troubleshooting electrical issues, and that includes knowing where the fuses related to your OBD2 system are located. Fuses protect your vehicle’s electrical circuits from overloads, and when one blows, it can affect various components, potentially including your On-Board Diagnostics system. This guide will walk you through the fuse box locations in your 2012 Nissan Altima, provide fuse diagrams, and explain the function of each fuse, ensuring you can quickly identify and address any fuse-related problems, including those that might impact your OBD2 port.
Instrument Panel Fuse Box
Fuse box location
The primary fuse box inside your 2012 Nissan Altima is conveniently situated within the passenger compartment. To access it, look for a cover located beneath and to the left of the steering wheel. This panel is easily accessible for quick checks and fuse replacements.
Fuse box diagram
Below is the diagram for the instrument panel fuse box in your 2012 Nissan Altima. This diagram details the location and function of each fuse. Refer to this chart to pinpoint the fuse related to a specific component.
Here is a table detailing the fuse assignments for the Instrument Panel Fuse Box in your 2012 Nissan Altima:
| № | Amp | Description |
|---|---|---|
| 1 | 20 | Heated Seat |
| 2 | 10 | SRS Air Bag Control System |
| 3 | 10 | Air Conditioner Control, Body Control Module, Audio, Compass, CVT Control System, Electronically Controlled Power Steering System, Inside Mirror, Power Distribution System, Rear Window Defogger, Tire Pressure Monitoring System, Engine Control System |
| 4 | 10 | Back-up Lamp, Audio, Navigation, ABS, TCS, VDC, Charging System, CVT Control System, Engine Control System, Headlamp, Illumination, Combination Meter, SRS Air Bag Control System, Tire Pressure Monitoring System, Turn Signal and Hazard Warning Lamps, Warning Chime |
| 5 | 15 / 20 | Power Socket (2007-2009: 15A; 2010-2013: 20A) |
| 6 | 10 | Body Control Module, Intelligent Key System, Air Conditioner Control, CVT Control System, Engine Control System, Homelink Universal Transmitter |
| 7 | 10 | Stop Lamp, ABS, TCS, VDC, CVT Control System, Engine Control System, Body Control Module, Intelligent Key System, NVIS, Power Distribution System |
| 8 | – | Not Used |
| 9 | 10 | Interior Room Lamp, Body Control Module, Intelligent Key System, NVIS, Power Distribution System |
| 10 | 10 | Body Control Module, Headlamp, Auto Light System, Daytime Light System, Front Fog Lamp, Front Wiper and Washer System, Illumination, Intelligent Key System, Interior Room Lamp, NVIS, Parking Lamp, License Plate Lamp, Tail Lamp, Power Distribution System, Power Door Lock System, Power Window System, Sunroof, Turn Signal and Hazard Warning Lamps, Vehicle Security System, Warning Chime |
| 11 | 10 | Headlamp, Intelligent Key System, Combination Meter, NVIS, Tire Pressure Monitoring System, Turn Signal and Hazard Warning Lamps, Vehicle Security System, Warning Chime, CVT Control System |
| 12 | – | Not Used |
| 13 | 10 | Body Control Module, Rear Window Defogger |
| 14 | 20 | Rear Window Defogger |
| 15 | 20 | Rear Window Defogger |
| 16 | – | Not Used |
| 17 | – | Not Used |
| 18 | 15 | Power Socket |
| 19 | 10 | Audio, Body Control Module, Air Conditioner, Door Mirror, Intelligent Key System, Combination Meter, Power Distribution System, Sunroof |
| 20 | – | Not Used |
| 21 | 15 | Air Conditioner Control, Body Control Module |
| 22 | 15 | Air Conditioner Control, Body Control Module |
Engine Compartment Fuse Box
Fuse box location
In addition to the instrument panel fuse box, your 2012 Nissan Altima also has a fuse box located in the engine compartment. This fuse box houses fuses and relays that protect engine and other critical systems. The exact placement can be found under the hood, typically near the battery or engine control unit. Consult your owner’s manual for the precise location if needed.
Fuse box diagram
The engine compartment fuse box diagram is crucial for identifying fuses related to your engine, transmission, and other vital components. Below is the diagram for the engine compartment fuse box in a 2012 Nissan Altima.
Here’s a breakdown of the fuses and relays in the Engine Compartment Fuse Box for your 2012 Nissan Altima:
| № | Amp | Description |
|---|---|---|
| 24 | 15 | Audio, Navigation |
| 25 | 15 | Audio, Navigation |
| 26 | 15 | Audio, Navigation |
| 27 | – | Not Used |
| 28 | – | Not Used |
| 29 | 10 | Charging System |
| 30 | 15 | Horn, Intelligent Key System, Vehicle Security System |
| 31 | 10 | BCM (Body Control Module), Starting System, Intelligent Key System, NVIS, Power Distribution System |
| F | 50 | VDC |
| G | 30 | ABS, TCS, VDC |
| H | 40 | BCM (Body Control Module), Headlamp, Auto Light System, Daytime Light System, Front Fog Lamps, Front Wiper and Washer System, Illumination, Intelligent Key System, Interior Room Lamp, NVIS, Parking Lamp, License Plate Lamp, Tail Lamp, Power Door Lock System, Power Distribution System, Power Seat , Power Window System, Rear Window Defogger, Sunroof, Tire Pressure Monitoring System, Trunk Lid Opener, Turn Signal and Hazard Warning Lamps, Warning Chime, Vehicle Security System |
| I | 40 | ABS, TCS |
| J | – | Not Used |
| K | 40 | Engine Control System |
| L | 40 | Ignition |
| M | 40 | Engine Control System |
| 32 | 15 | Fuel Pump Relay |
| 33 | 10 | BCM (Body Control Module), Engine Control System, CVT Control System, Intelligent Key System, NVIS, Starting System |
| 34 | 10 | CVT Control System |
| 35 | 10 | Engine Control System |
| 36 | 10 | ABS, TCS, VDC |
| 37 | 15 | Engine Control System |
| 38 | 10 | Front Wiper and Washer System |
| 40 | 10 | Steering Lock Relay |
| 41 | 10 | Air Conditioner Relay |
| 42 | 15 | Engine Control Module (ECM) Relay |
| 43 | 10 / 15 | Throttle Control Motor Relay (2007-2009: 10A; 2010-2013: 15A) |
| 46 | 10 | Parking Lamp, Tail Lamp, License Plate Lamp |
| 47 | 10 | Parking Lamp, Tail Lamp, License Plate Lamp, Illumination, Auto Light System |
| 48 | 10 | Headlamp (High), Auto Light System, Daytime Light System |
| 49 | 10 | Headlamp (High), Auto Light System, Daytime Light System |
| 51 | 15 | Headlamp (Low), Auto Light System, Daytime Light System |
| 52 | 15 | Headlamp (Low), Auto Light System, Daytime Light System |
| 53 | 15 | Front Fog Lamp |
| 54 | 10 | Not Used |
| 55 | 30 | Front Wiper Relay |
| Relays | ||
| R1 | Horn | |
| R2 | Cooling Fan Motor (3) |
Fusible Link Block (Main Fuses)
Location of Main Fuses
The fusible link block, containing the main fuses for your 2012 Nissan Altima, is located directly on the battery positive terminal. These high-amperage fuses protect major electrical systems from significant power surges.
Main Fuses Diagram
Here is the diagram for the fusible link block, showing the main fuses and their functions:
| № | Amp | Description |
|---|---|---|
| A | 250 | Generator, Starter, Fuses E, D |
| B | 80 | Ignition Relay (1), Fuses 40, 41, 42, 43 |
| C | 100 | Accessory Relay, Fuses 5, 6, 7, 9, 10, 11 |
| D | 60 | Headlamp High Relay, Headlamp Low Relay, Tail Lamp Relay, Fuses 53, 54, 55 |
| E | 100 | Fuses F, G, H, I, K, L, M, 24, 25, 26, 29, 30, 31 |
While the diagrams here don’t explicitly label an “OBD2 fuse,” the systems related to OBD2 diagnostics, such as the Engine Control System, Body Control Module, and related sensors, are protected by various fuses across these fuse boxes. Specifically, fuses related to the “Engine Control System” and “Body Control Module” in both the Instrument Panel and Engine Compartment fuse boxes could indirectly affect the OBD2 system’s functionality. If you are experiencing issues with your OBD2 port, checking fuses associated with these systems is a good starting point.
For more in-depth information and troubleshooting tips, consider exploring these helpful resources:
- How to check the fuses?
- How to replace a blown fuse?
- Why do car fuses blow?
- Types of automotive fuses
