Fuse box diagram (fuse location), location and purpose of fuses and relays Acura MDX (YD1; 2001, 2002, 2003, 2004, 2005, 2006).
Checking and replacing fuses
All electrical circuits in your vehicle have fuses to protect against short circuits or overloads. These fuses are located in four fuse boxes.
If something electrical in your car stops working, the first thing you should check is a blown fuse. Use the charts or diagram on the fuse box cover (the driver’s side passenger compartment fuse box diagram is on the panel below the fuse box) to determine which fuse or fuses control that component. Check those fuses first, but check all fuses before deciding that a blown fuse is not the cause. Replace any blown fuses and test the component for operation.
- Turn the ignition key to the LOCK (0) position. Make sure the headlights and all other accessories are off.
- Remove the cover from the fuse box.
- Check each of the large fuses in the primary fuse box under the hood by looking through the top at the wire inside. Removing these fuses requires a Phillips-head screwdriver.
- Check the smaller fuses in the underhood fuse box and all fuses in the interior fuse boxes by pulling each fuse with a fuse puller located in the primary underhood fuse box.
- Find the blown wire inside the fuse. If it is blown, replace it with a spare fuse of the same rating or lower.
If you cannot drive the car without fixing the problem and you do not have a spare fuse, get a fuse of the same or lower rating from one of the other circuits. Make sure you can temporarily bypass that circuit (such as an outlet or radio). If you replace a blown fuse with a lower-rated spare fuse, it may blow again. This does not indicate anything. Replace the fuse with a fuse of the correct rating as soon as possible. - If a replacement fuse of the same rating blows in a short time, your vehicle likely has a serious electrical problem. Leave the blown fuse in that circuit and have a qualified mechanic check your vehicle.
Note
Replacing a fuse with a higher rating greatly increases the chances of damaging the electrical system. If you do not have a spare fuse with the correct rating for the circuit, install a fuse with a lower rating.
Overview of the passenger cabin
Fuse Box #1 Wiring Diagram in the Passenger Compartment (Driver Side)
The interior fuse boxes are located under the instrument panel on each side.
| No. | A | Protected component |
|---|---|---|
| 1 | 15 | Fuel pump, Supplemental Restraint System (SRS) unit |
| 2 | 10 | Supplemental Restraint System (SRS) Unit |
| 3 | 7.5 | A/C Compressor Clutch Relay, Blower Motor Relay, Climate Control Panel, Climate Control Unit, A/C Condenser Fan Relay, Fan Control Relay, Rear Blower Motor Relay, Rear Heater-AC Control Panel Unit, Rear Mode Control Motor, Rear Defogger Relay, Recirculation Control Motor |
| 4 | 7.5 | Auto-dimming mirror, Automatic light control unit, Electric compass unit (without navigation system), Multi-information display unit (without navigation system), Additional R socket, Electric mirror drive, Electric mirror heater, Seat heater relay |
| 5 | 10 | Daytime running lights control unit |
| 6 | 15 | PCM, VTM-4 Relay (’03), Shift Lock Relay (’05-’06) |
| 7 | 7.5 | Occupant Position Detection System (OPDS) Unit, Seat Weight Sensor Unit |
| 8 | 7.5 | Accessory Power Port Relay, Accessory Ports, Shift Lock Solenoid, Rear Accessory Power Port Relay |
| 9 | 10 | Automatic Light Control Unit, Brake Light Malfunction Sensor, Cruise Control Main Switch Indicator, Driver Multiplexer Control Unit, Driver Power Seat Control Unit, Sensor Assembly, Shift Lock Relay (’03-’04), Keyless Entry Receiver Unit, Passenger Multiplexer Control Unit, Passenger Air Bag OFF Indicator, Rain Sensor (with Automatic Wiper), Reverse Relay, VTM-4 Control Unit, VTM-4 Relay (’04-’06), VTM-4 Lock Switch, Windshield Washer Motor (with Automatic Wiper), Tire Pressure Monitoring System (TPMS) Control Unit (’04-’06) |
| 10 | 7.5 | Turn signal/hazard warning relay |
| 11 | 10 | Intermittent rear window wiper control unit, rear window wiper motor, rear window washer motor |
| 12 | 30 | Intermittent Windscreen Wiper Relay, Windscreen Washer Motor, Windscreen Wiper Motor (with Automatic Wiper), Automatic Wiper Relay (with Automatic Wiper) |
| 13 | — | — |
| Back side | ||
| R1 | Starting cut | |
| R2 | Ensure regression | |
| R3 | Direction indicator / Danger | |
Auxiliary fuse holders
| No. | A | Protected component |
|---|---|---|
| 90 | 7.5 | Horn relay, Horn (low) |
| 91 | 7.5 | Windscreen wiper control unit, windscreen wiper motor (with automatic wiper) |
| 92 | 7.5 | Generator, Electrical Load Detector (ELD) Unit (’03), Immobilizer Receiver Control Unit, VSA Modulator Control Unit, Fuse (Passenger Compartment Fuse Box #1): #6 |
Fuse Box #2 Wiring Diagram in the Passenger Compartment (Passenger Side)
The interior fuse boxes are located under the instrument panel on each side. To open the passenger side fuse box, pull the right edge of the cover.
| No. | A | Protected component |
|---|---|---|
| 1 | 30 | Motor on the roof |
| 2 | 20 | Driver’s power seat rear up/down motor, Driver’s power seat tilt motor, Driver’s power seat control unit (with DPMS) |
| 3 | 20 | Front passenger seat Front seat up/down Front passenger seat sliding motor |
| 4 | 20 | Driver’s front power seat up/down motor, driver’s power seat slide motor, driver’s power seat control unit (with DPMS) |
| 5 | 20 | Front passenger power seat up/down motor, front passenger power seat tilt motor, passenger multiplexer control unit |
| 6 | 10 | Daytime Running Lights Control Unit, OnStar Control Unit (’05 -’06) |
| 7 | 20 | Left Rear Window Motor, Sunroof Open Relay (’03), Sunroof Close Relay (’03) |
| 8 | 20 | Front passenger window lift motor |
| 9 | 15 | Audio System, Console Accessory Power Port, DVD Player (with Rear Entertainment System), Front Accessory Power Port, Headphone Jack (with Rear Entertainment System), Multi-Information Display Unit (without Navigation System), Navigation Display Unit, Navigation Unit, Cigarette Lighter Auxiliary Port, Rear Controller and Screen (with Rear Entertainment System), Rear View Camera Control Unit (with Navigation System) |
| 10 | 15 | Transmission Position Indicator Panel Light, Audio System Light, Climate Control Unit Light, Cruise Control Master Switch Light, Headlamp Brightness Controller, Driver Position Memory Switch Light, Driver Multiplexer Control Unit, DVD Player, Glove Box Light, Fog Light Light Switch, Indicator Assembly, Hazard Warning Indicator, Light Switch, Interior Light Switch, Front Parking Lights, Left Tail Light, License Plate Light (LH & RH), Sunroof Light Switch, Multi-Information Display Unit Light, Navigation Display Unit Light, Navigation Unit, Aux T-Socket, Passenger Air Bag Off Indicator, Front Side Marker Light, Right Tail Light, Seat Heater Switch Light, Light Select/Reset Switch, Tail Light Relay, Trailer Light Connector, VTM-4 Lock Switch Light Ambient Lighting (’05 – ’06) |
| 11 | 10 | Luggage compartment light, Auxiliary light, Multi-information display unit (without navigation system), Navigation display unit, Door mirror lighting, Rear map light, Front map light/HomeLink footwell light (’04 -’06), Tire Pressure Monitoring System (TPMS) Control Unit Control Unit (’04) |
| 12 | 20 | Power door lock, passenger multiplex control unit, trunk lid master release |
| 13 | 7.5 | Automatic Light Control Unit, Door Multiplexer Control Unit, Driver Power Seat Control Unit (with DPMS), Driver Multiplexer Control Unit, Driver Position Memory Switch Indicator, Sensor Assembly, Immobilizer Control Receiver Unit, Immobilizer Indicator, Keyless Receiver Unit, Navigation Unit, Passenqer Multiplexer Control Unit, Rear View Camera Control Unit (with Navigation), Security Indicator |
| 14 | 20 | Heated seats |
| 15 | 7.5 | Door multiplexer control unit, window lifter control unit, sunroof open relay (’04 -’06), sunroof close relay (’04 -’06) |
| 16 | 20 | Right rear window motor |
| Back side | ||
| R1 | Window lifter | |
| R2 | Power connector for accessories | |
| R3 | Rear window heating | |
Primary Engine Compartment Fuse Box Diagram
The primary fuse box under the hood is located at the rear of the engine compartment on the passenger side. To open it, press the tabs.
| No. | A | Protected component |
|---|---|---|
| 41 years old | 120 | Battery, power distribution |
| 42 | 50 | Ignition switch (BAT), additional U-socket |
| 43 | 20 | Headlight (right), daytime running lights control unit, fog light relay |
| 44 | — | — |
| 45 | 20 | Headlight (left), daytime running light control unit, dimmer relay, high beam indicator |
| 46 | 15 | Data Link Connector (DLC), Injectors, PGM-FI Main Relay 1, Camshaft Position (CMP) Sensor, Crankshaft Position (CKP) Sensor A, Crankshaft Position (CKP) Sensor B |
| 47 | 20 | Brake Lights, Driver Multiplexer Control Module, Horn (High), Ignition Switch, Powertrain Control Module (PCM), Trailer Light Connector, VSA Modulator Control Module, Fuse (Auxiliary Fuse Holder): #90 |
| 48 | 20 | Audio system (without rear seat entertainment system), sound amplifier |
| 49 | 15 | Warning lights |
| 50 | 20 | Fog lights |
| 51 | 40 | Electric window relay, fuse (passenger compartment fuse box #2): #1, 7, 8, 15, 16 |
| 52 | 30 | Rear Fan Motor |
| 53 | 30 | Rear window heating |
| 54 | 40 | Fuse (Passenger Compartment Fuse Box No. 2): No. 9, 10, 11, 12, 13 |
| 55 | 40 | Fuse (Passenger Compartment Fuse Box No. 2): No. 2, 3, 4, 5, 6, 14 |
| 56 | 40 | Fan Motor Relay |
| 57 | 30 | Radiator Fan Motor |
| 58 | 30 | Air conditioner condenser fan motor |
| 59 | 7.5 | Air conditioning compressor clutch |
| • | — | Spare fuse |
| Relay | ||
| R1 | Headlight #1 (right) | |
| R2 | Headlight #2 (left) | |
| R3 | Horn | |
| R4 | Air conditioner condenser fan | |
| R5 | Fan motor | |
| R6 | Radiator fan | |
| R7 | Air conditioning compressor clutch | |
Secondary Engine Compartment Fuse Box Diagram
The secondary fuse box is located in the engine compartment next to the battery.
| No. | A | Protected component |
|---|---|---|
| 1 | 20 | Audio System (with Rear Entertainment System), Rear Controller and Screen (with Rear Entertainment System), DVD Player (with Rear Entertainment System), VTM-4 Control Unit (’03 -’04) |
| 2 | 40 | VSA Modulator Control Unit (+ B FSR) |
| 3 | 30 | VSA Modulator Control Unit (+ B MTR) |
| 4 | 20 | VTM-4 Control Unit (’04-’06), Audio System (with Rear Entertainment System), Rear Screen Controller (with Rear Entertainment System), DVD Player (with Rear Entertainment System) (’03-’04) |
| 5 | — | — |
| 6 | 20 | Rear panel accessory power connector |
| 7 | 15 | Throttle actuator control module |
| 8 | 15 | Ignition coils |
| 9 | 15 | Air-Fuel Ratio (A/F) Sensors (Bank 1, Bank 2), Air-Fuel Ratio (A/F) Sensor Relay, Radiator Fan Relay, Engine Mount Control Solenoid, Evaporative Emission Control (EVAP) Canister Purge Valve, Secondary Heated Oxygen Sensors (Bank 1, Bank 2), Electrical Load Detector (ELD) Assembly (’04-’06) |
| 10 | 7.5 | PCM (VBU), Tire Pressure Monitoring System (TPMS) Control Unit (’05), HandsFreeLink Control Unit (’05) |
| 11 | 20 | Window lifter control unit |
Relay box in the engine compartment
| No. | Relay |
|---|---|
| R1 | Sound amplifier |
| Dimmer | |
| R2 | Intermittent wiper |
| R3 | Fan control |
| R4 | Shift Lock |
| Automatic wiper |