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Home >> Nissan-Datsun >> 1992 >> Sentra SE-R >> Repair and Diagnosis >> Electrical >> Charging Systems >> Alternator & Regulator - MITSUBISHI >> Testing >> On-Vehicle Testing >> Alternator test

Alternator test

  1. Ensure battery is fully charged before testing. Turn ignition on and check charge indicator light on instrument panel. If light comes on, go to step 3).
    NOTE: Terminals "B", "E", "L" and "S" are marked on the alternator's rear cover.
  2. If light is off, disconnect alternator connector and ground wire of terminal "L". If light comes on, replace regulator and alternator. If light remains off, replace indicator bulb and retest.
  3. Start and run engine at idle. If charge indicator light is dim, flickers or remains on (bright), repair alternator. If light goes off, run engine at 1500 RPM and turn on headlights. If light remains off, go to step 4). If light comes on, replace alternator.
  4. Run engine at 1500 RPM and measure voltage at terminal "B". If voltage is more than 15.5 volts, replace IC regulator. If voltage is 13-15 volts, alternator and regulator are okay.
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