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.
2003 Nissan-Datsun Sentra SE-R, StandardFACTORY OEM SERVICE PROCEDURE
Setting Change Functions
WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
- Sensitivity of auto light system can be adjusted using CONSULT-II. Refer to "WORK SUPPORT ".
CHECK POWER SUPPLY AND GROUND CIRCUIT
- CHECK FUSES OR FUSIBLE LINK
- Check for blown-out fuses or fusible link.
UNIT AND FUSE NO SPECIFICATION CHARTUnit Power source Fuse No. BCM Battery j 3 Ignition switch ON or START position 16 Ignition switch ACC or ON position 4 - IPDM E/R Battery 34 36 38 41 45 - Refer to "WIRING DIAGRAM --- AUTO/L --- ".
OK or NG
- OK: GO TO 2.
- NG: If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to SYSTEM WIRING DIAGRAMS .
- CHECK POWER SUPPLY CIRCUIT
- Disconnect BCM connector.
- Check voltage between BCM harness connector and ground.
TERMINAL VOLTAGE CHARTTerminals Ignition switch position (+) (-) OFF ACC ON Connector Terminal (Wire color) M18 11 (V) Ground 0V Battery voltage Battery voltage 38 (R) 0V 0V Battery voltage M19 42 (Y/G) Battery voltage Battery voltage Battery voltage 55 (W/B) Battery voltage Battery voltage Battery voltage OK or NG
- OK: GO TO 3.
- NG: Check harness for open between BCM and fuse.
- CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground.
TERMINAL CONTINUITY CHARTTerminals Continuity (+) (-) Connector Terminal (Wire color) M19 49 (B) Ground Yes 52 (B/W) OK or NG
- OK: INSPECTION END.
- NG: Check ground circuit harness.
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.
