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.
1991 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE
System Operational Check
- Turn ignition on. ANTI-LOCK warning light on dash should illuminate. If light does not illuminate, go to DIAGNOSTIC PROCEDURE 7. See Figure .
- If light turns on, start engine. ANTI-LOCK warning light should go out. If ANTI-LOCK warning light remains on after starting engine, go to RETRIEVING CODES under DIAGNOSIS & TESTING.
- If ANTI-LOCK warning light goes off after engine is started, drive vehicle at 19 MPH or faster for at least one minute. If warning light remains off, no fault has been detected by ECU. If light illuminates during road test, go to RETRIEVING CODES under DIAGNOSIS & TESTING.
- If ANTI-LOCK light does not illuminate after engine is started and a problem exists, diagnose by symptom. Go to SYMPTOMS under TROUBLE SHOOTING.
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.