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
Specific Gravity Check
- Read hydrometer and thermometer indications at eye level.
- Use Hydrometer Temperature Correction to correct your hydrometer reading according to electrolyte temperature.
Hydrometer Temperature Correction
| Battery electrolyte temperature °C (°F) | Add to specific gravity reading |
|---|---|
| 71(160) | 0.032 |
| 66(150) | 0.028 |
| 60(140) | 0.024 |
| 54(130) | 0.020 |
| 49(120) | 0.016 |
| 43(110) | 0.012 |
| 38(100) | 0.008 |
| 32(90) | 0.004 |
| 27(80) | 0 |
| 21(70) | -0.004 |
| 16(60) | -0.008 |
| 10(50) | -0.012 |
| 4(40) | -0.016 |
| -1(30) | 0.020 |
| -7(20) | -0.024 |
| -12(10) | -0.028 |
| -18(0) | -0.032 |
Hydrometer Temperature Correction`
| Corrected specific gravity | Approximate charge condition |
|---|---|
| 1.260-1.280 | Fully charged |
| 1.230-1.250 | 3/4charged |
| 1.200-1.220 | 1/2charged |
| 1.170-1.190 | 1/4charged |
| 1.140-1.160 | Almost discharged |
| 1.110-1.130 | completely discharged |
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.