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
Service Data And Specifications (SDS): Generator
GENERATOR
| Application | QG18DE | QR25DE |
|---|---|---|
| Type | LR180-769 (HITACHI) | LR1100-734 (HITACHI) |
| Nominal rating | 12V-80V | 12V-110V |
| Ground polarity | Negative | Negative |
| Minimum revolution under no-lead (When 13.5 volts is applied) | 1,000 rpm | 950 rpm |
| Hot output current (When 13.5 volts is applied) | 23A/1,300 rpm, 60A/2,500 rpm, 79A/5,000 rpm | 35A/1,300 rpm, 83A/2,500 rpm, 95A/5,000 rpm |
| Regulated output voltage | 14.1 - 14.7V | 14.1 - 14.7V |
| Minimum length of brush | 6 mm (0.236 in) | 6 mm (0.236 in) |
| Brush spring pressure | 1.000 - 3.432 N (0.102 - 0.350 kg, 0.225 - 0.772 lbs) | 1.000 - 3.432 N (0.102 - 0.350 kg, 0.225 - 0.772 lbs) |
| Slip ring minimum outer diameter | 26.0 mm (1.024 in) | 26.0 mm (1.024 in) |
| Rotor (Field coil) resistance | 2.67 ohms | 2.31 ohms |
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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