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.
SYS.OK|MANUAL.DBβ LIVE
HOMESERVICE MANUALSACURA2018MDX BASEREPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALBODY ELECTRICALELECTRICAL SYSTEM - TESTING & TROUBLESHOOTING / GEN INFO (EXCEPT HYBRID)FUSE TO COMPONENTS INDEXFUSE TO COMPONENTS INDEX (WITHOUT AUTO IDLE STOP SYSTEM) (2018)MAIN UNDER-HOOD FUSE BOX (B)
2018 Acura MDX Base
Main Under-Hood Fuse Box (B)
2018 Acura MDX BaseSECTION Main Under-Hood Fuse Box (B)
Main Under-Hood Fuse Box (B) Legend
| Fuse Number | Amps | Component(s) or Circuit(s) Protected | |
|---|---|---|---|
| B1 | 150 A | No. B3-1, No. B3-2, No. B3-3, No. B3-4, No. B3-5, No. B3-6, No. B3-7, No. B3-8 (with headlight washer), No. B4, No. B5, No. B6, and No. B7 fuses in the main under-hood fuse box | |
| B2 | B2-1 | 60 A | EPS control unit |
| B2-2 | 60 A | No. E14, No. E15, No. E26, No. E27, and No. E28 (with AC inverter) fuses in the passenger's under-dash fuse/relay box | |
| B2-3 | 60 A | No. F18 fuse in the rear fuse/relay box | |
| B2-4 | 60 A | Not used | |
| B2-5 | 30 A | No. B10 fuse in the main under-hood fuse box, Rear blower motor (via rear blower motor relay) | |
| B2-6 | 30 A | No. B8, No. B9 fuses in the main under-hood fuse box | |
| B2-7 | 20 A | VSA modulator-control unit | |
| B2-8 | 40 A | VSA modulator-control unit | |
| B3 | B3-1 | 50 A | No. D6, No. D7, and No. D9 fuses in the driver's under-dash fuse/relay box |
| B3-2 | 30 A | Under-dash subrelay box | |
| B3-3 | 60 A | No. F1, No. F3, No. F4, No. F5, No. F7 (with second row seat heater), No. F14 (with SH-AWD), No. F15, and No. F16 fuses in the rear fuse/relay box | |
| B3-4 | 50 A | No. E1, No. E2, No. E3, No. E4 (with heated windshield wiper area), No. E5, No. E6, No. E7, No. E8, No. E9 (with power lumber support), No. E11 (with heated steering wheel), and No. E18 fuses in the passenger's under-dash fuse/relay box | |
| B3-5 | 50 A | No. D15, No. D16, No. D17, No. D18, No. D19, No. D29, No. D30, No. D31, and No. D32 fuses in the driver's under-dash fuse/relay box | |
| B3-6 | 60 A | No. C20, No. C22, No. C24, No. C25, No. C26 (via headlight relay), No. C27 (via headlight relay), and No. C31 fuses in the under-hood fuse/relay box, Headlight relay | |
| B3-7 | 30 A | Under-dash subrelay box | |
| B3-8 | 30 A | Headlight washer motor (via headlight washer relay) (with headlight washer), Headlight washer relay (with headlight washer) | |
| B4 | 40 A | No. C8, No. C9, No. C10, No. C11, No. C12, No. C13, No. C14, No. C15, and No. C16 fuses in the under-hood fuse/relay box | |
| B5 | 40 A | Front blower motor (via front blower motor relay) | |
| B6 | 40 A | Rear window defogger (via rear window defogger relay) | |
| B7 | 30 A | No. D25 fuse in the driver's under-dash fuse/relay box (via starter cut relay 1), Starter (via starter cut relay 1 and starter cut relay 2) | |
| B8 | 20 A | Brake lights (via brake light relay), Brake pedal position switch, High mount brake light (via brake light relay), Horn relay, Horn (HIGH) (via horn relay), Horn (LOW) (via horn relay), Security horn relay circuit (built into the relay control module), Security horn (via security horn relay circuit (built into the relay control module)), VSA modulator-control unit (via brake light relay) | |
| B9 | 10 A | Hazard warning switch (via driver's under-dash fuse/relay box), Headlights (turn signal), Driver's MICU (via driver's under-dash fuse/relay box at internal connection) | |
| B10 | 7. 5 A | 12 volt battery sensor | |
| B11 | - - - | Not used | |
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.