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, AutomaticFACTORY OEM SERVICE PROCEDURE
Terminals and Reference Values for BCM
WARNING: This page is about a different car, the 2006 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
BCM TERMINALS AND REFERENCE VALUES
| Terminal No. | Wire color | Signal name | Measuring condition | Reference value (Approx.) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Ignition switch | Operation or condition | |||||||||
| 2 | SB | Combination switch input 5 | ON | Lighting, turn, wiper OFF Wiper dial position 4 |
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| 3 | G/Y | Combination switch input 4 | ON | Lighting, turn, wiper OFF Wiper dial position 4 |
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| 4 | Y | Combination switch input 3 | ON | Lighting, turn, wiper OFF Wiper dial position 4 |
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| 5 | G/B | Combination switch input 2 | ON | Lighting, turn, wiper OFF Wiper dial position 4 |
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| 6 | V | Combination switch input 1 | ||||||||
| 12(1) | R/L | Front door switch RH signal | OFF | Front door switch RH | ON (open) | 0V | ||||
| OFF (closed) | Battery voltage | |||||||||
| 12(2) | R/L | Door switch RH signal | OFF | Door switch RH | ON (open) | 0V | ||||
| OFF (closed) | Battery voltage | |||||||||
| 13(1) | GR | Rear door switch RH signal | OFF | Rear door switch RH | ON (open) | 0V | ||||
| OFF (closed) | Battery voltage | |||||||||
| 18 | P | Sensor ground | ON | - | 0V | |||||
| 32 | R/G | Combination switch output 5 | ON | Lighting, turn, wiper OFF Wiper dial position 4 |
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| 33 | R/Y | Combination switch output 4 | ON | Lighting, turn, wiper OFF Wiper dial position 4 |
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| 34 | L | Combination switch output 3 | ON | Lighting, turn, wiper OFF Wiper dial position 4 |
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| 35 | O/B | Combination switch output 2 | ON | Lighting, turn, wiper OFF Wiper dial position 4 |
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| 36 | R/W | Combination switch output 1 | ||||||||
| 38 | W/L | Ignition switch (ON) | ON | - | Battery voltage | |||||
| 39 | L | CAN-H | - | - | - | |||||
| 40 | P | CAN-L | - | - | - | |||||
| 47(1) | SB | Front door switch LH signal | OFF | Front door switch LH | ON (open) | 0V | ||||
| OFF (closed) | Battery voltage | |||||||||
| 47(2) | SB | Door switch LH signal | OFF | Door switch LH | ON (open) | 0V | ||||
| OFF (closed) | Battery voltage | |||||||||
| 48(1) | R/Y | Rear door switch LH signal | OFF | Rear door switch LH | ON (open) | 0V | ||||
| OFF (closed) | Battery voltage | |||||||||
| 58 | W/R | Optical sensor signal | ON | When optical sensor is illuminated | 3.1V or moreNote | |||||
| When optical sensor is not illuminated | 0.6V or less | |||||||||
| 67 | B | Ground | ON | - | 0V | |||||
| 70 | W/B | Battery power supply | OFF | - | Battery voltage | |||||
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NOTE:
Optical sensor must be completely subjected to work lamp light. If the optical sensor is insufficiently illuminated, the measured value may not satisfy standard.
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.