Nissan Maxima 1993-1998 Repair Guide

Alternator

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TESTING



The easiest way to test the performance of the alternator is to perform a regulated voltage test.

  1. Start the engine and allow it to reach operating temperature.
  2.  
  3. Connect a voltmeter between the positive and negative terminals of the battery.
  4.  
  5. Voltage should be 14.1-14.7 volts.
  6.  
  7. If voltage is higher or lower than specification, connect a voltmeter between the battery positive (B+) voltage output terminal of the alternator and a good engine ground.
  8.  
  9. Voltage should be 14.1-14.7 volts.
  10.  
  11. If voltage is still out of specification, a problem exists in the alternator or voltage regulator.
  12.  
  13. If voltage is now within specification, a problem exists in the wiring to the battery or in the battery itself.
  14.  

Many automotive parts stores have alternator bench testers available for use by customers. An alternator bench test is the most definite way to determine the condition of your alternator.

REMOVAL & INSTALLATION



1993-94 Models

See Figures 1 through 5

  1. Disconnect the negative battery cable, for safety purposes.
  2.  
  3. Remove the right side splash guard from under the vehicle.
  4.  
  5. Disconnect the alternator lead wires and connections. Label them if you are unsure of their locations.
  6.  



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Fig. Fig. 1: The large positive lead connection is protected by a rubber boot



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Fig. Fig. 2: Make sure the alternator ground wire is also removed

  1. Loosen the drive belt adjusting bolt and slip the belt off the pulley.
  2.  
  3. Remove the lower adjustment bolt, followed by the upper pivot bolt.
  4.  



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Fig. Fig. 3: Remove the lower adjustment bolt ...



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Fig. Fig. 4: ... followed by the upper pivot bolt. Make sure you support the alternator

  1. Lower the alternator from the vehicle.
  2.  

To install:
  1. Using a C-clamp and a socket, push the upper pivot bushing back in it's bore until it bottoms out.
  2.  



Click image to see an enlarged view

Fig. Fig. 5: Using a C-clamp to push in the pivot bushing will make installation easier

  1. Raise the alternator into the engine bracket, and push the upper pivot bolt all the way through the bracket to support it.
  2.  
  3. Install the lower adjustment bolt, followed by the upper pivot nut.
  4.  
  5. Place the belt on the alternator pulley, and tighten the belt.
  6.  
  7. Tighten the upper and lower mounting bolts.
  8.  
  9. Engage the alternator lead wires and connections.
  10.  
  11. Connect the negative battery cable.
  12.  
  13. Start the vehicle, and check for proper operation.
  14.  
  15. Readjust the belt tension, if necessary. Install the lower splash guard.
  16.  

1995-98 Models
  1. Disconnect the negative battery terminal.
  2.  
  3. Remove the splash guard on the right side of the vehicle.
  4.  
  5. Loosen the alternator belt idler pulley.
  6.  
  7. Slip the drive belt off the alternator pulley.
  8.  
  9. Remove the four air conditioning compressor mounting bolts.
  10.  
  11. Remove the radiator fan and fan shroud.
  12.  
  13. Move the air conditioning compressor forward.
  14.  
  15. Disconnect the alternator harness connector.
  16.  
  17. Remove the alternator mounting bolts, and lower the alternator from the vehicle.
  18.  

To install:
  1. Hold the alternator in place and install the mounting bolts.
  2.  
  3. Plug in the alternator harness connector.
  4.  
  5. Move the air conditioning compressor back into location.
  6.  
  7. Install the radiator cooling fan and shroud.
  8.  
  9. Install the air conditioning compressor mounting bolts.
  10.  
  11. Place the drive belt on the alternator pulley.
  12.  
  13. Tighten the drive belt to the proper tension with the idler pulley.
  14.  
  15. Install the splash guard.
  16.  
  17. Connect the negative battery terminal.
  18.  

Proper belt tension is important. A belt that is too tight may cause alternator bearing failure; one that is too loose will cause a gradual battery discharge and/or belt slippage, resulting in belt breakage from overheating.

 
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