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.
2005 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE
Smart Entrance Control Unit: Description: Input/Output
INPUT/OUTPUT CHART
| System | Input | Output |
|---|---|---|
| Power door lock | Door lock and unlock switch LH and RH Key switch (Insert) Door switches Door key cylinder switch |
Door lock actuator |
| Remote keyless entry | Key switch (Insert) Ignition switch (ACC) Door switches Front door unlock sensor LH Keyfob signal |
Vehicle security lamp relay Vehicle security horn relay Interior lamp Remote keyless entry relay Door lock actuator Trunk lid opener actuator |
| Warning chime | Key switch (Insert) Ignition switch (ON) Lighting switch (1st or 2nd) Seat belt buckle switch LH Front door switch LH |
Warning chime (located in smart entrance control unit) |
| Rear window defogger and door mirror defogger | Ignition switch (ON) Rear window defogger switch |
Rear window defogger relay |
| Vehicle security | Ignition switch (ACC, ON) Door switches Door lock/unlock switches Door key cylinder switch (lock/unlock) Trunk lid key cylinder switch (unlock) Door unlock sensors |
Vehicle security lamp relay Horn relay Security indicator lamp |
| Interior lamp | Door switches Front door unlock sensor LH Ignition switch (ON) Key switch (Insert) |
Interior lamp |
| Battery saver control for interior lamp/map lamp/vanity lamps | Ignition switch (ON) Door switches Lamp switches Main power window and door lock/unlock switch |
Interior lamp Map lamp Vanity lamps |
Factory Service Tools
Use the Manual With the Right Hardware
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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.