Solstice 2006-2008, Sky 2007-2008

Alternator

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Diagnosis & Testing



2.4L (LE5) & 2.0L (LNF) Engines
  1. Check battery age and connections.
  2.  
  3. With the ignition OFF, install a battery tester and verify the condition of the battery.
    NOTE
    If the battery is not sufficiently charged test results will not be accurate.

  4.  
  5. Connect a Vat 40 tester or equivalent to the battery.
  6.  
  7. Turn the ignition to the OFF/LOCK position.
  8.  
  9. Observe and record the battery voltage reading at the battery terminals on the tester.
  10.  
  11. Start the engine and observe the system voltage reading on the tester. Does the voltage increase from the first specified (engine OFF) to the second (engine ON) specified range-
  12.  
  13. Turn ON the following accessories:

    Headlights-HI beams
     
    A/C on Max
     
    Blower Fan-On high
     
    Rear window defogger
     
    Heated seats, if equipped
     

  14.  
  15. Maintain engine speed at 2,500 RPM. Voltage readings should be between 13.9-15.5 volts.
    NOTE
    When measuring generator output current, be sure the inductive probe encircles the generator output wire.

  16.  
  17. Connect an inductive ammeter probe to the output circuit of the generator.
  18.  
  19. Start the engine.
  20.  
  21. Increase engine speed to 2,500 RPM.
  22.  
  23. Adjust the carbon pile as necessary in order to obtain the maximum current output.
  24.  
  25. Is the generator output greater than or equal to the load test value as specified.
    1. Rated out put 125 amp. Load test output 87 amp.
    2.  

  26.  
  27. If Alternator output is as specified the system is okay.
  28.  

Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the drive belt.
  6.  
  7. Disconnect the alternator wiring.
  8.  
  9. Remove the bolts.
  10.  
  11. Installation is the reverse of removal. Torque the mounting bolts to 16 ft. lbs. (22 Nm).

    Click image to see an enlarged view

    Fig. Alternator mounting

  12.  

 
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