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.DB● LIVE
HOMESERVICE MANUALSNISSAN-DATSUN2004SENTRA L4-2.5L (QR25DE)REPAIR AND DIAGNOSISACCESSORIES AND OPTIONAL EQUIPMENTANTITHEFT AND ALARM SYSTEMSDESCRIPTION AND OPERATIONVEHICLE SECURITY (THEFT WARNING) SYSTEMVEHICLE SECURITY SYSTEM DEACTIVATION
2004 Nissan-Datsun Sentra L4-2.5L (QR25DE)
Vehicle Security System Deactivation
2004 Nissan-Datsun Sentra L4-2.5L (QR25DE)SECTION Vehicle Security System Deactivation
VEHICLE SECURITY SYSTEM DEACTIVATION
To deactivate the vehicle security system, a door or trunk lid must be unlocked with the key or keyfob.
When the key is used to unlock the door, smart entrance control unit terminal 30 receives a ground signal:
- from terminal U of front door key cylinder switch LH
- to terminal E of front door key cylinder switch LH
- through body grounds M28 and M54.
When the key is used to open the trunk lid, smart entrance control unit terminal 42 receives a ground signal:
- from terminal + of the trunk lid key cylinder switch (unlock switch)
- to terminal - of the trunk lid key cylinder switch (unlock switch)
- through body grounds B13 and B19.
When the smart entrance control unit receives either one of these signals or unlock signal from keyfob, the vehicle security system is deactivated. (Disarmed phase)
To deactivate the vehicle security system, a door or trunk lid must be unlocked with the key or keyfob.
When the key is used to unlock the door, smart entrance control unit terminal 30 receives a ground signal:
- from terminal U of front door key cylinder switch LH
- to terminal E of front door key cylinder switch LH
- through body grounds M28 and M54.
When the key is used to open the trunk lid, smart entrance control unit terminal 42 receives a ground signal:
- from terminal + of the trunk lid key cylinder switch (unlock switch)
- to terminal - of the trunk lid key cylinder switch (unlock switch)
- through body grounds B13 and B19.
When the smart entrance control unit receives either one of these signals or unlock signal from keyfob, the vehicle security system is deactivated. (Disarmed phase)
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.