PT Cruiser 2006-2007

Alternator

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Diagnosis & Testing



The alternator provides power consuming components with current while the engine is running and maintains battery charge. The alternator is mounted on the front edge of the engine. The output of the alternator depends on engine speed. When the engine is idling, the alternator operates at approximately half of its maximum output. When the engine is idling with many power consuming components engaged, the alternator may be unable to maintain full battery charge.

The alternator creates an alternating current which is converted to a direct current in the rectifier bridge. The alternator also utilizes a built-in voltage regulator.

  1. Check that the wiring is in good condition.
  2.  
  3. Check for any abnormal noise from the alternator while the engine is running. Noise emitting from the alternator may be caused by:

    Worn, loose or defective bearings
     
    Loose or defective drive pulley
     
    Incorrect, worn, damaged, or misadjusted drive belt
     
    Loose mounting bolts
     
    Misaligned drive pulley
     
    Defective stator or diode
     
    Damaged internal fins
     

  4.  
  5. Check the accessory drive belt for wear or slipping.
  6.  
  7. With the engine running at 2,500 RPM, headlights on and fan blower on high:
    1. The alternator output voltage should be 14.0 volts plus or minus 0.5 volts at 68°F.
    2.  
    3. The alternator test amperage should be 135 Amps.
    4.  

  8.  

Removal & Installation



Remove or disconnect the following:



The negative battery cable
 
The air cleaner lid
 
The Inlet Air Temperature (IAT) sensor and make-up hose
 
The upper alternator adjustment lock nut, loosen only
 
The right front wheel
 
The splash shield
 
The support bracket
 
The lower pivot bolt, loosen only
 
The drive belt T-bolt, loosen only
 
The alternator wiring connectors
 
The alternator belt
 
The axle retaining nut
 
The lower control arm from the steering knuckle
 
The axle shaft
 
The lower mounting bolt from the upper adjustment bracket
 
The alternator

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Fig. Remove the lower pivot bolt from the alternator



Click image to see an enlarged view

Fig. The removal and installation of the alternator

 

To install:

Install or connect the following:



The alternator
 
The alternator drive belt
 
The axle shaft
 
The lower control arm to the steering knuckle
 
The lower ball joint nut and torque the nut to 70 ft. lbs. (95 Nm)
 
The axle retaining nut and torque the nut to 120 ft. lbs. (163 Nm)
 
The support bracket
 
The alternator electrical connectors and torque the B+ terminal nut to 100 inch lbs. (11 Nm)
 
The splash shield and right front wheel
 
The right front wheel. Tighten the wheel lug nuts to 100 ft. lbs. (136 Nm).
 
The upper pivot nut and torque to 40 ft. lbs. (54 Nm)
 
The negative battery cable
 
The air cleaner lid, IAT sensor and make up hose
 

 
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