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.
2002 Nissan-Datsun Sentra SE-R, AutomaticFACTORY OEM SERVICE PROCEDURE
System Description: Outline
WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
- BCM (Body Control Module) controls the various electrical components. It inputs the information required to the control from CAN communication and the signal received from each switch and sensor.
- BCM has combination switch reading function for reading the operation status of combination switches (light, turn signal, wiper and washer) in addition to a function for controlling the operation of various electrical components. It also has the signal transmission function as the passed point of signal and the power consumption control function that reduces the power consumption with the ignition switch OFF.
- BCM is equipped with the diagnosis function that performs the diagnosis with CONSULT and various settings.
BCM CONTROL FUNCTION LIST
| System | Refer to |
|---|---|
| Combination switch reading system | "SYSTEM DIAGRAM " |
| Signal buffer system | "SYSTEM DIAGRAM " |
| Power consumption control system | "SYSTEM DIAGRAM " |
| Auto light system | "SYSTEM DIAGRAM " |
| Turn signal and hazard warning lamp system | "SYSTEM DIAGRAM " |
| Headlamp system | "SYSTEM DIAGRAM " |
| Front fog lamp system (if equipped) | "SYSTEM DIAGRAM " |
| Daytime running light system (if equipped) | "SYSTEM DIAGRAM " |
| Interior room lamp control system | "SYSTEM DIAGRAM " |
| Step lamp system | "SYSTEM DIAGRAM " |
| Interior room lamp battery saver system | "SYSTEM DIAGRAM " |
| Front wiper and washer system | "SYSTEM DIAGRAM " |
| Rear wiper and washer system | "SYSTEM DIAGRAM " |
| Warning chime system | "WARNING CHIME SYSTEM: SYSTEM DIAGRAM " |
| Door lock system |
|
| (NATS) Nissan anti-theft system |
|
| Vehicle security system |
|
| Rear window defogger system | "SYSTEM DIAGRAM " |
| Remote keyless entry system | "REMOTE KEYLESS ENTRY: SYSTEM DIAGRAM " |
| Intelligent Key system (if equipped) | "CONSULT FUNCTION (INTELLIGENT KEY) " |
| Power window system | "SYSTEM DIAGRAM " |
| RAP (retained accessory power) system | "RETAINED PWR: CONSULT FUNCTION (BCM - RETAINED PWR) " |
| TPMS (tire pressure monitoring system) | "SYSTEM DIAGRAM " |
Factory Service Tools
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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.
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