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.
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HOMESERVICE MANUALSNISSAN-DATSUN2012SENTRA SE-RREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEDOOR LOCKSBODY, LOCK & SECURITY SYSTEMSERVICE INFORMATIONVEHICLE SECURITY (THEFT WARNING) SYSTEMSYMPTOM CHART
2012 Nissan-Datsun Sentra SE-R
Symptom Chart
2012 Nissan-Datsun Sentra SE-RSECTION Symptom Chart
| SYMPTOM | PROCEDURE | Diagnostic procedure | |||
|---|---|---|---|---|---|
| 1 | Vehicle security system cannot be set by.... | All items | Diagnostic Procedure 1 (Door switch check) Refer to , "DIAGNOSIS PROCEDURE 1 ". |
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| Diagnostic Procedure 7 (Trunk room lamp switch check) Refer to , "DIAGNOSIS PROCEDURE 7 ". |
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| If the above systems are "OK", replace BCM. Refer to , "REMOVAL AND INSTALLATION OF BCM ". | |||||
| Lock/unlock switch | Diagnostic Procedure 6 (Door lock/unlock switch check) Refer to , "DIAGNOSIS PROCEDURE 6 ". |
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| If the above systems are "OK", check main power window and door lock/unlock switch. Refer to POWER WINDOW SYSTEM . | |||||
| Door outside key (driver) | Diagnostic Procedure 3 (Door key cylinder switch check) Refer to , "DIAGNOSIS PROCEDURE 3 ". |
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| If the above systems are "OK", check main power window and door lock/unlock switch. Refer to POWER WINDOW SYSTEM . | |||||
| Keyfob | Check remote keyless entry function. Refer to , "TROUBLE DIAGNOSIS SYMPTOM CHART ". | ||||
| If the above systems are "OK", replace BCM. Refer to , "REMOVAL AND INSTALLATION OF BCM ". | |||||
| 2 | Security indicator does not turn "ON". | Security indicator lamp | Diagnostic Procedure 2 (Security indicator lamp check) Refer to , "DIAGNOSIS PROCEDURE 2 ". |
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| If the above systems are "OK", replace BCM. Refer to , "REMOVAL AND INSTALLATION OF BCM ". | |||||
| 3 | (1) Vehicle security system does not alarm when.... | Any door or trunk is opened. | Diagnostic Procedure 1 (Door switch check) Refer to , "DIAGNOSIS PROCEDURE 1 ". |
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| Diagnostic Procedure 7 (Trunk room lamp switch check) Refer to , "DIAGNOSIS PROCEDURE 7 ". |
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| If the above systems are "OK", replace BCM. Refer to , "REMOVAL AND INSTALLATION OF BCM ". | |||||
| 4 | Vehicle security alarm does not activate. | Horn alarm | Diagnostic Procedure 4 (Vehicle security horn alarm check). Refer to , "DIAGNOSIS PROCEDURE 4 ". |
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| If the above systems are "OK", check horn system. Refer to HORN . |
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| Head lamp alarm | Diagnostic Procedure 5 (Head lamp alarm check). Refer to , "DIAGNOSIS PROCEDURE 5 ". |
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| If the above systems are "OK", replace BCM. Refer to , "REMOVAL AND INSTALLATION OF BCM ". | |||||
| 5 | Vehicle security system cannot be canceled by.... | Door outside key (driver) | Diagnostic Procedure 3 (Door key cylinder switch check). Refer to , "DIAGNOSIS PROCEDURE 3 ". |
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| If the above systems are "OK", check main power window and door lock/unlock switch. Refer to POWER WINDOW SYSTEM . | |||||
| Intelligent Key | Check Intelligent Key entry function. Refer to , "SYSTEM DESCRIPTION ". | ||||
| If the above systems are "OK", replace BCM. Refer to , "REMOVAL AND INSTALLATION OF BCM ". | |||||
| Keyfob | Check remote keyless entry function. Refer to , "TROUBLE DIAGNOSIS SYMPTOM CHART ". | ||||
| If the above systems are "OK", replace BCM. Refer to , "REMOVAL AND INSTALLATION OF BCM ". | |||||
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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.