PT Cruiser 2006-2007



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.
  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

  5. Check the accessory drive belt for wear or slipping.
  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.
    3. The alternator test amperage should be 135 Amps.


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

Click image to see an enlarged view

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