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 MANUALSACURA2013MDX 3.7L ENG VIN YD2REPAIR AND DIAGNOSISELECTRICALMOTORS, SWITCHES, RELAYSFUSE/RELAY BOXESCONNECTOR TO FUSE/RELAY BOX INDEX
2013 Acura MDX 3.7L Eng VIN YD2
Connector to Fuse/Relay Box Index
2013 Acura MDX 3.7L Eng VIN YD2SECTION Connector to Fuse/Relay Box Index
Under-Hood Fuse/Relay Box
Fig 1: Locating Fog Light Relay And Interior Light Relay In Under-Hood Fuse/Relay Box (Auxiliary Under-Hood Relay Block Part)
UNDER-HOOD FUSE/RELAY BOX (AUXILIARY UNDER-HOOD RELAY BLOCK PART)
| Socket | Ref | Terminals | Connects to |
|---|---|---|---|
| Fog light relay | 1 | 4 | Right engine compartment wire harness |
| Interior light relay | 2 | 4 | Right engine compartment wire harness |
UNDER-HOOD FUSE/RELAY BOX (RELAY CONTROL MODULE PART)
| Socket | Ref | Terminals | Connects to |
|---|---|---|---|
| A | 5 | 4 | Right engine compartment wire harness |
| B | 2 | 5 | Right engine compartment wire harness |
| C | 3 | 2 | Right engine compartment wire harness |
| D | 8 | 10 | Right engine compartment wire harness |
| E | 7 | 14 | Right engine compartment wire harness |
| F | 6 | 1 | Right engine compartment wire harness |
| G | 1 | 4 | Right engine compartment wire harness |
| H | 4 | 9 | Right engine compartment wire harness |
UNDER-HOOD FUSE/RELAY BOX (RELAY BLOCK PART)
| Socket | Ref | Terminals | Connects to |
|---|---|---|---|
| A | 9 | 1 | Right engine compartment wire harness |
| A/C compressor clutch relay | 2 | 4 | |
| A/C condenser fan relay | 3 | 4 | |
| B | 8 | 1 | Right engine compartment wire harness |
| C | 5 | 1 | Right engine compartment wire harness |
| A/C diode A | 11 | --- | |
| A/C diode B | 10 | --- | |
| Fan control relay | 1 | 5 | |
| Front blower motor relay | 7 | 4 | |
| Headlight low beam relay | 6 | 4 | |
| Radiator fan relay | 4 | 4 |
AUXILIARY UNDER-HOOD FUSE/RELAY BOX
| Socket | Ref | Terminals | Connects to | ||
|---|---|---|---|---|---|
| Brake light relay (1) | 1 | 5 | Right engine compartment wire harness | ||
| TECH relay | 2 | 4 | Right engine compartment wire harness | ||
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Under-Dash Fuse/Relay Box
UNDER-DASH FUSE/RELAY BOX
| Socket | Ref | Terminals | Connects to |
|---|---|---|---|
| A | 6 | 6 | Dashboard wire harness |
| Accessory power socket relay | 8 | 4 | |
| B | 19 | 6 | Left engine compartment wire harness |
| C | 18 | 12 | Left engine compartment wire harness |
| D | 20 | 17 | Left engine compartment wire harness |
| E | 25 | 16 | Floor wire harness |
| F | 26 | 14 | Floor wire harness |
| Front seat heater relay | 9 | 4 | |
| G | 21 | 6 | Floor wire harness |
| H | 24 | 14 | Floor wire harness |
| J | 16 | 21 | Driver's door subharness |
| K | 15 | 12 | Driver's door subharness |
| M (MICU service check connector) | 14 | 3 | |
| N | 2 | 45 | Dashboard wire harness |
| P | 23 | 30 | Dashboard wire harness |
| PGM-FI main relay 2 (FUEL PUMP) | 13 | 4 | |
| Power window relay | 11 | 4 | |
| Q | 22 | 14 | Floor wire harness |
| R | 3 | --- | Not used |
| S (for SRS) | 5 | 2 | Dashboard wire harness |
| Short pin (for fuel pump) | 10 | --- | |
| Short pin (for lumbar support) | 12 | --- | |
| T | 7 | 6 | Not used |
| Turn signal/hazard relay | 4 | 6 | |
| W | 17 | 5 | Left engine compartment wire harness |
| X | 1 | 39 | Dashboard wire harness |
Rear Fuse/Relay Box
REAR FUSE/RELAY BOX
| Socket | Ref | Terminals | Connects to |
|---|---|---|---|
| A | 5 | 2 | Floor wire harness |
| B | 4 | 34 | Floor wire harness |
| C | 3 | 42 | Rear wire harness |
| Cargo area accessory power socket relay | 1 | 4 | |
| D (for trailer) | 6 | 11 | Not used |
| Rear window defogger relay | 2 | 4 |
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.