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
Diagnostic Procedure
WARNING: This page is about a different car, the 2002 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.
- Harness inspection. Turn ignition "OFF". Disconnect BCM connector and combination switch connector. Check continuity between BCM harness connector (M19), terminal No. 51 (Green/Yellow) input 4 wire and terminal No. 42 (Red/Yellow) output 4 wire, harness side, and body ground. See Figure . If continuity exists, check harness between BCM and combination switch for short circuit. If continuity does not exist, go to next step. See EXTERIOR LIGHTS in 2002 SYSTEM WIRING DIAGRAMS NISSAN - ALTIMA article.
- Inspection of BCM input terminal voltage. Connect BCM connector. Turn ignition "ON". Check voltage between BCM connector (M19), terminal No. 51 (Green/Yellow) input wire, harness side, and body ground. If the voltage is 4.5 volts or greater, there is a combination switch malfunction, go to next step. If the voltage is not greater than 4.5 volts, replace BCM. See REMOVAL & INSTALLATION .
- Combination switch inspection. Replace lighting switch. Reconfirm self-diagnostic results. See COMBINATION SWITCH INSPECTION ACCORDING TO SELF-DIAGNOSTIC RESULTS . If OK, inspection is complete. If not OK, replace wiper switch. See REMOVAL & INSTALLATION . Reconfirm self-diagnostics results. If OK, inspection is complete. If not OK, replace switch base. Reconfirm self-diagnostic results. If OK, inspection is complete. If not OK, reconfirm symptom. See SYMPTOM INDEX table.
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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