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Home >> Nissan-Datsun >> 1991 >> Sentra SE-R >> Repair and Diagnosis >> Electrical >> Charging Systems >> Alternator & Regulator - HITACHI >> Testing >> On-Vehicle Testing >> Alternator Test
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Alternator Test

  1. Ensure battery is fully charged before starting test. Turn ignition on and check charge indicator light on instrument panel. If light comes on, go to step 3).
    NOTE: Terminals "S", "L", "B", and "E" are marked on alternator's rear cover. Terminal "F" is inside alternator.
  2. If light is off, disconnect alternator connector and ground wire of terminal "L". If light remains off, replace indicator bulb and recheck. If light comes on, reconnect alternator and ground internal terminal "F" using jumper wire. See Fig 1. If light is off, repair alternator. If light is on, replace IC regulator.
    Fig 1: Full Fielding Hitachi Alternator
    G90G09386Courtesy of NISSAN MOTOR CO., U.S.A.
  3. Start and run engine at idle. If light is dim, flickers or remains on (bright), repair alternator. If the light goes off, operate engine at 1500 RPM and turn on headlights. If charge indicator light remains off, go to step 4). If charge indicator light comes on, replace IC regulator.
  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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