Where are the fuse boxes and relay located?

  1. Passenger Compartment : The Fuse & Relay Box and Additional items are located in the passenger compartment.
  2. Engine Compartment Fuse Box: The Fuse & Relay Box is located in the engine compartment.
  3. Additional Elements: The control units and relays for various equipment in the Honda Civic are located in different parts of the vehicle body.

1. Passenger Compartment

Fuse Box, Control Unit & Relay

2001-honda-civic-passenger-compartment-fuse-box-and-relays-location pic
1Fuse and relay box
2Daytime running lights control unit (DRL)
3Hatchback: Daytime running light (DRL) relay
4Hatchback (’02-’03): Low Beam Interrupt Relay
5Cruise control unit
6Hatchback: Central locking/ keyless entry receiver

Additional Items

1Immobilizer control unit (receiver)
2Audio system
3Sedan, Coupe: Daytime running light (DRL) relay, Low Beam Relay
4Heater control panel
1Engine Control Module Relay (PGM-FI) #1
Engine Control Module Relay (PGM_FI) #2 (Fuel Pump)
2Power steering control unit (EPS)
3Engine Control Module (ECM/PCM)
4Air Fuel Ratio (A/F) Sensor Relay
5Airbag control unit
1Moonroof Control Unit
2Moonroof Open and Close Relays
3Rear Wiper Intermittent Control Unit
Sedan, Coupe
1Central locking/ keyless entry receiver
2Engine Control Module (ECM)/PCM)
3Hybrid: Transmission Control Module (TCM)
4Hybrid: Power steering (EPS) control unit
5Hybrid: Air Fuel Ratio (A/F) Sensor Relay
6Hybrid: Reverse Lamp Relay (A/T)
7Engine Control Module (PGM-FI) Relay #2 (Fuel Pump)
8Engine Control Module Relay (PGM-FI) #1
9Except Hybrid: Air Fuel Ratio (A/F) Sensor Relay
10Except Hybrid: Reverse Lamp Relay (A/T)
11Airbag control unit
1Hybrid: Motor Control Module (MCM)
2Hybrid: MCM Relay №1, MCM Relay №2
Except for Hybrid: Moonroof Open and Close Relays
3Power Window Master Switch

2. Engine Compartment Fuse Box

1Except for Hatch, Hybrid: Fuse Box
2Hatchback, Hybrid: Fuse Box
3Hybrid: Relay Box

2003 Honda Civic Fuse Box Diagram

Passenger Compartment

2003 Honda Civic Under Dash Fuse Box Diagram

The interior fuse box is underneath the steering column. To open it, turn the knobs as shown.


2003 Honda Civic Passenger Compartment Fuse Box Diagram

2001-Honda-Civic-under-dash-fuse-box-diagram pic

2003 Honda Civic Under Dash Fuse Details

AmpsProtected Component
115Except Hybrid: Ignition Coils
15Hybrid: Engine Control Module (ECM), Front Ignition Coils
220Air Fuel (A/F) Ratio Sensor
310Daytime Running Lights (DRL) Control Unit, Multiplex Control Unit
410Air Fuel (A/F) Sensor Relay, Alternator, Camshaft Position (CMP) Sensor, Cruise Control Unit, Electrical Load Detector (ELD) Unit, Evaporative Emission Control (EVAP) Bypass Solenoid Valve, EVAP Canister Purge Valve, EVAP Canister Vent Shut Valve, Heated Oxygen Sensor (HO2S), Vehicle Speed Sensor (VSS), DC-DC Converter (Hybrid), Transmission Control Module (TCM), Third Heated Oxygen Sensor (HO2S)
5 –
67.5Moonroof Control Unit, Moonroof Open and Close Relays, Power Window Relay
720Moonroof Open and Close Relays
87.5Audio Unit, Multiplex Control Unit, CarLink Interface Box (CarLink)
910Occupant Position Detection System (OPDS) Unit (Side Airbag), Rear Window Wiper Intermittent Control Unit, Rear Window Wiper Motor, Wiper/Washer Switch
15Hybrid: Engine Control Module (ECM), Rear Ignition Coils
107.5Back-Up Light Switch (M/T), Electronic Power Steering (EPS) Control Unit, Gauge Assembly, Keyless Receiver Unit, Multiplex Control Unit, Security Control Unit, A/T Reverse Relay (A/T), CarLink Interface Box (CarLink), Shift Lock Solenoid (A/T)
117.5ABS Modulator-Control Unit
127.5Daytime Running Lights (DRL) Control Unit, Multiplex Control Unit
1310Supplemental Restraint System (SRS) Unit
1410A/C Compressor Clutch Relay, A/C Condenser Fan Relay, Blower Motor Relay, Heater Control Panel, Power Mirror Switch, Radiator Fan Relay, Recirculation Control Motor, Rear Window Defogger Relay
152Security Control Unit
10Security Control Unit
1620Heated Seat
7.5Motor Control Module (MCM) Relay №1
1715Fuel Pump, Engine/Powertrain Control Module (ECM/PCM), PGM-FI Main Relay №2, Supplemental Restraint System (SRS) Unit
1815Accessory Power Socket
197.5Hazard Warning Switch, Turn Signal/Hazard Relay
2030Hatch: Multiplex Control Unit, Windshield Wiper/Washer Switch, Windshield Wiper Motor
20Multiplex Control Unit, Windshield Wiper/Washer Switch, Windshield Wiper Motor
217.5Hybrid: Engine Control Module (ECM), Starter Cut Relay
2220Passenger’s Power Window Switch, Power Window Master Switch
2320Power Window Master Switch
2420Left Rear Power Window Switch
2520Right Rear Power Window Switch

Under Hood Honda Civic Fuse Box Diagram

2003 Honda Civic Fuse & Relay Box Location


2003 Honda Civic Under Hood Fuse Box Diagram


2003 Honda Civic Under Hood Fuse Box Details

AProtected Component
120Condenser Fan Relay Motor, A/C Compressor Clutch Relay
215except Hybrid: Taillight Relay, Dash Lights, Front Parking Lights, Front Side Marker Lights, Heater Control Panel, License Plate Lights, Taillights
10Hybrid: Motor Control Module (MCM) Relay №2
37.5except Hybrid: Cargo Area Light, Ceiling Light/Spotlights Ignition Key Switch/key Light, Spotlights, Trunk Light
10Hybrid: Ceiling Light, Ignition Key Switch/Key Light, Spotlights, Taillight Relay, Trunk Light
420Radiator Fan Relay
510Hazard Warning Switch
615PGM-FI Main Relay №1, Crankshaft Position (CKP) Sensor, Engine/Powertrain Control Module (ECM/PCM), Injectors, Idle Air Control (IAC) Valve, Immobilizer Control Unit-Receiver, PGM-FI Main Relay №2, Camshaft Position (CMP) (TDC) Sensor, Injector Control Module, Injector Relay
715Brake Pedal Position Switch, Horn Relay, Brake Lights, Brake Signals (to ABS Modulator-Control Unit, Engine/Powertrain Control Module (ECM/PCM), Multiplex
Control Unit
820ABS Modulator-Control Unit
910Audio Unit, Data Link Connector (DLC), Gauge Assembly, Immobilizer Control Unit-Receiver, Keyless Receiver Unit, Multiplex Control Unit, CarLink Interface Box, Motor Control Module (MCM) (Hybrid), Transmission Control Module (Hybrid), Security Control Unit
1040ABS Modulator-Control Unit
1130Rear Window Defogger Relay
40Coupe: Rear Window Defogger Relay
1240Blower Motor Relay
1340Fuses (Passenger Compartment): 7, 23
1440Fuses (Passenger Compartment): 2, 3, 5, 15, 16
40Hybrid: Hot Restart Fan Relay, Fuses (Passenger Compartment): 2, 3, 5, 15, 16, Fuse (Engine Compartment): № 60
1515Left Headlight, Daytime Running Lights (DRL) Control Unit, DRL Relay, Gauge Assembly, High Beam Indicator Light, Multiplex Control Unit
20Left Headlight, Daytime Running Lights (DRL) Control Unit, DRL Relay, DRL Diode, Gauge Assembly, High Beam Indicator Light, Multiplex Control Unit
1620Power Door Lock, Multiplex Control Unit
1715Right Headlight, Daytime Running Lights (DRL) Relay, Multiplex Control Unit
20Right Headlight, Daytime Running Lights (DRL) Control Unit, Multiplex Control Unit
1860Electronic Power Steering (EPS) Control Unit
1980Batter, Power Distribution
2040Ignition Switch (BAT)


R1Radiator Fan
R2A/C Compressor Clutch
R3Rear Window Defogger
R4Blower Motor
R5Headlight №1
R7Condenser Fan
R8Headlight №2

2003 Honda Civic Under Hood Relay Box Diagram


2003 Honda Civic Under Hood Relay Box Details

6020Radiator Fan Motor
R1Hot Restart Fan (Relay)
R2PGM-FI Main №2

WARNING: The terminal and harness assignments for individual connectors may vary depending on the vehicle’s equipment level, model, and market. It is recommended to refer to the fuse box diagram provided at the back of the fuse box cover for accurate information.

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