Table of Contents
Most electrical circuits in this vehicle are protected by fuses. Protective fuses and relays are housed in power distribution boxes located in the passenger compartment and the engine compartment.
Applies to Nissan Sentra (chassis code B15; MS platform) models manufactured in 2000, 2001, 2002, 2003, 2004, 2005, 2006.
Engine Compartment
The fuse box (#1) is located near the battery; the relay box (#2) is located on the right side of the engine compartment.
Fuse Box
Fuse box access example.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | Rating (A) |
| 32 | Audio system, subwoofer, satellite radio (2004–2006), CD changer (2000–2003) | 15 |
| 33 | Alternator, horn relay | 10 |
| 34 | Engine Control Module (ECM) relay | 15 |
| 35 | Security horn relay (2000), security warning light relay | 10 |
| 36 | Engine Control Module (ECM), ECM relay, immobilizer control module | 10/15 |
| 37 | Smart Entry Control Unit (SECU) | 10 |
| 38 | Combination light switch, Smart Entry Control Unit (SECU), Time Control Unit (TCU), interior illumination lamps, license plate light | 10 |
| 39 | Headlights, combination light switch, Daytime Running Light (DRL) control unit, security warning light relay | 15 |
| 40 | 15 | |
| 41 | Throttle control motor relay (2002–2006) | 15 |
| 42 | Audio amplifier (2002–2006) | 20 |
| 43 | Front fog light relay | 15 |
| A | Alternator, ignition relay (fuses “25”, “26”, “29”, “30”, “31”), fuses “D”, “H”, “I”, “2”, “3”, “4”, “5”, “6”, “7”, “39”, “40”, “41”, “42”, “43” | 100/120 |
| B | Accessory relay (fuse “22”), ignition relay (fuses “8”, “9”, “10”, “11”), cooling fan relay (fuses “14”, “16”), fuses “12”, “13” | 80 |
| C | Ignition switch | 40 |
| D | Circuit breaker (Smart Entry Control Unit [SECU], power window relay, sunroof) | 30 |
| E | Not used | — |
| F | Anti-lock Braking System (ABS) | 40 |
| G | 40 | |
| H | Cooling fan relay 1, cooling fan relay 3 (QR engine) | 40 |
| I | Cooling fan relay 1, cooling fan relay 2 | 40 |
Relay Box
Overview.
| Diagram | |
|---|---|
|
|
| No. | Description |
| R1 | Security warning light relay |
| R2 | Cooling fan relay 3 (QR engine) |
| R3 | Front fog light relay |
| R4 | Clutch interlock relay (manual transmission) |
| R5 | Cooling fan relay 1 |
| R6 | Horn relay |
| R7 | A/C clutch relay |
| R8 | Park/Neutral position switch relay (automatic transmission) |
| R9 | Cooling fan relay 2 |
| R10 | Security horn relay (2000) |
Passenger Compartment
Located under the instrument panel, to the left of the steering column.
Fuse box access example.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | Rating (A) |
| 1 | Audio system, power mirror switch, accessory socket relay, Smart Entry Control Unit (SECU), satellite radio (2004–2006), CD changer (2005–2006) | 10 |
| 2 | Brake light switch, brake lights, high-mounted stop light | 10 |
| 3 | 12V power outlet relay | 15 |
| 4 | Rear window defogger relay | 20 |
| 5 | Keyless entry relay, hazard warning switch | 15 |
| 6 | Trunk lid release relay, trunk lid release actuator | 10 |
| 7 | Rear window defogger relay | 20 |
| 8 | Heated Oxygen Sensor (HO2S), Mass Air Flow (MAF) sensor | 15 |
| 9 | EVAP canister vent control valve, vacuum cut valve bypass solenoid valve (2000–2003) | 10 |
| 10 | Daytime running light control unit, Time Control Unit (TCU), Smart Entry Control Unit (SECU), power window relay, sunroof switch, brake light switch (QR engine), rear defogger relay, Data Link Connector (DLC), ASCD (cruise control) brake switch (2002–2006), A/T control unit (2000–2003), trunk lid release relay 2 (2000), ASCD control unit (2000–2002) | 10 |
| 11 | Transmission Control Module (TCM), revolution sensor, turbine revolution sensor (QR engine) | 10 |
| 12 | Ignition key switch, instrument cluster, security warning light, Transmission Control Module (TCM), Data Link Connector (DLC) | 10 |
| 13 | Time Control Unit (TCU), heated mirror relay, trunk light, interior lamps | 10 |
| 14 | Blower motor | 15 |
| 15 | A/C auto amp (2000–2002) | 10 |
| A/C switch, A/C relay (2002–2006) | ||
| 16 | Blower motor | 15 |
| 17 | Fuel injectors, Engine Control Module (ECM), fuel pump relay | 10 |
| 18 | Airbag diagnosis sensor unit | 10 |
| 19 | Not used | — |
| 20 | Park/Neutral position switch (automatic transmission), immobilizer control module (QR engine), clutch interlock relay (manual transmission), cooling fan relays 1–3, throttle control motor relay (2000–2002), EVAP canister purge volume control solenoid valve (2000–2003), intake valve timing control solenoid valve (2000–2002), swirl control valve control solenoid valve (2000–2001), VIAS control solenoid valve (2002–2003) | 10 |
| 21 | Daytime running light control unit, ECM (2000–2003) | 10 |
| 22 | Nissan Sentra cigarette lighter fuse | 15 |
| 23 | Not used | — |
| 24 | Not used | — |
| 25 | Front wiper motor, front washer motor, front wiper switch | 20 |
| 26 | Hazard switch | 10 |
| 27 | Not used | — |
| 28 | Not used | — |
| 29 | Fuel pump relay | 15 |
| 30 | Instrument cluster, reverse light switch (manual transmission), park/neutral position switch (automatic transmission) | 10 |
| 31 | Anti-lock Braking System (ABS) | 10 |
| 32 | Spare |
— |
| 33 | — | |
| 34 | — | |
| Relays: | ||
| R1 | Circuit breaker (Smart Entry Control Unit [SECU], power window relay, sunroof) | |
| R2 | Heated mirror relay | |
| R3 | 12V power outlet relay | |
| R4 | Trunk lid release relay | |
| R5 | Power window relay | |
| R6 | Keyless entry relay | |
| R7 | Ignition relay | |
| R8 | Blower motor relay | |
| R9 | Accessory relay | |