SRX 2004-2005

Alternator

Print

Diagnosis & Testing



Load Test
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. With the engine running, turn on the blower motor and the high beams (or other electrical accessories to place a load on the charging system).
  4.  
  5. Increase and hold engine speed to 2000 rpm.
  6.  
  7. Measure the voltage reading at the battery.
  8.  
  9. The voltage should increase at least 0.5 volts from the voltage test. If the voltage does not meet specifications, the charging system is malfunctioning.
    NOTE
    Usually under and overcharging is caused by a defective alternator, or its related parts (regulator), and replacement will fix the problem; however, faulty wiring and other problems can cause the charging system to malfunction. Many automotive parts stores have alternator bench testers available for use by customers. An alternator bench test is the most definitive way to determine the condition of your alternator.

  10.  

No Load Test
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Connect a tachometer to the engine.
    CAUTION
    Ensure that the transmission is in Park and the emergency brake is set. Blocking a wheel is optional and an added safety measure.

  4.  
  5. Turn off all electrical loads (radio, blower motor, wipers, etc.)
  6.  
  7. Start the engine and increase engine speed to approximately 1500 rpm.
  8.  
  9. Measure the voltage reading at the battery with the engine holding a steady 1500 rpm. Voltage should have raised at least 0.5 volts, but no more than 2.5 volts.
  10.  
  11. If the voltage does not go up more than 0.5 volts, the alternator is not charging. If the voltage goes up more than 2.5 volts, the alternator is overcharging.
    NOTE
    Usually under and overcharging is caused by a defective alternator, or its related parts (regulator), and replacement will fix the problem; however, faulty wiring and other problems can cause the charging system to malfunction. Many automotive parts stores have alternator bench testers available for use by customers. An alternator bench test is the most definitive way to determine the condition of your alternator.

  12.  
  13. If the voltage is within specifications, proceed to the next test.
  14.  

Voltage Test
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Make sure the engine is OFF , and turn the headlights on for 15-20 seconds to remove any surface charge from the battery.
  4.  
  5. Using a DVOM set to volts DC, probe across the battery terminals.
  6.  
  7. Measure the battery voltage.
  8.  
  9. Write down the voltage reading and proceed to the next test.
  10.  

Removal & Installation



3.6L Engine
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the accessory drive belt.
  6.  
  7. Raise and support the vehicle.
  8.  
  9. Disconnect the alternator wiring connector.
  10.  
  11. Remove the positive cable nut.
  12.  
  13. Remove the alternator.

    Click image to see an enlarged view

    Fig. Alternator mounting-3.6L engine

  14.  

To install:

  1. Position the alternator on the engine.
  2.  
  3. Install the alternator mounting bolts. Tighten the bolts to 37 ft. lbs. (50 Nm).
  4.  
  5. Tighten the positive cable nut to 89 inch lbs. (10 Nm).
  6.  
  7. Connect the wiring connector.
  8.  
  9. Install and tension the accessory drive belt.
  10.  
  11. Connect the negative battery cable.
  12.  

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the accessory drive belt.
  6.  
  7. Raise and support the vehicle.
  8.  
  9. Disconnect the alternator wiring connector.
  10.  
  11. Remove the positive cable nut.
  12.  
  13. Remove the alternator.

    Click image to see an enlarged view

    Fig. Alternator mounting-3.6L engine

  14.  

To install:

  1. Position the alternator on the engine.
  2.  
  3. Install the alternator mounting bolts. Tighten the bolts to 37 ft. lbs. (50 Nm).
  4.  
  5. Tighten the positive cable nut to 89 inch lbs. (10 Nm).
  6.  
  7. Connect the wiring connector.
  8.  
  9. Install and tension the accessory drive belt.
  10.  
  11. Connect the negative battery cable.
  12.  

4.6L Engine
2wd Models
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the accessory drive belt.
  6.  
  7. Remove the alternator upper mounting bolts.
  8.  
  9. Raise and support the vehicle.
  10.  
  11. Remove the front air deflector.
  12.  
  13. Remove the lower alternator mounting bolt.
  14.  
  15. Disconnect the alternator wiring connector.
  16.  
  17. Remove the positive cable nut.
  18.  
  19. Remove the alternator.

    Click image to see an enlarged view

    Fig. Alternator mounting-4.6L engine

  20.  

To install:

  1. Install alternator positive lead and tighten to 111 inch lbs. (13 Nm).
  2.  
  3. Connect the wiring connector.
  4.  
  5. Install the lower alternator mounting bolt but do not tighten.
  6.  
  7. Lower the vehicle.
  8.  
  9. Install the upper mounting bolts. Tighten all bolts to 37 ft. lbs. (50 Nm).
  10.  
  11. Install the front air deflector.
  12.  
  13. Install and tension the accessory drive belt.
  14.  
  15. Connect the negative battery cable.
  16.  

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the accessory drive belt.
  6.  
  7. Remove the alternator upper mounting bolts.
  8.  
  9. Raise and support the vehicle.
  10.  
  11. Remove the front air deflector.
  12.  
  13. Remove the lower alternator mounting bolt.
  14.  
  15. Disconnect the alternator wiring connector.
  16.  
  17. Remove the positive cable nut.
  18.  
  19. Remove the alternator.

    Click image to see an enlarged view

    Fig. Alternator mounting-4.6L engine

  20.  

To install:

  1. Install alternator positive lead and tighten to 111 inch lbs. (13 Nm).
  2.  
  3. Connect the wiring connector.
  4.  
  5. Install the lower alternator mounting bolt but do not tighten.
  6.  
  7. Lower the vehicle.
  8.  
  9. Install the upper mounting bolts. Tighten all bolts to 37 ft. lbs. (50 Nm).
  10.  
  11. Install the front air deflector.
  12.  
  13. Install and tension the accessory drive belt.
  14.  
  15. Connect the negative battery cable.
  16.  

AWD Models
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the accessory drive belt.
  6.  
  7. Remove the alternator upper mounting bolts.
  8.  
  9. Raise and support the vehicle.
  10.  
  11. Remove the front air deflector.
  12.  
  13. Remove the right front wheel.
  14.  
  15. Remove the right wheel splash shield
  16.  
  17. Remove the right and left front stabilizer bar links at the lower control arms.
  18.  
  19. Rotate the stabilizer bar down enough to access the alternator.
  20.  
  21. Remove the lower alternator mounting bolt.
  22.  
  23. Disconnect the alternator wiring connector.
  24.  
  25. Remove the positive cable nut.
  26.  
  27. Remove the alternator through the wheelhouse opening.

    Click image to see an enlarged view

    Fig. Alternator mounting-4.6L engine

  28.  

To install:

  1. Install alternator positive lead and tighten to 111 inch lbs. (13 Nm).
  2.  
  3. Connect the wiring connector.
  4.  
  5. Install the lower alternator mounting bolt but do not tighten.
  6.  
  7. Lower the vehicle.
  8.  
  9. Install the upper mounting bolts. Tighten all bolts to 37 ft. lbs. (50 Nm).
  10.  
  11. Raise the vehicle.
  12.  
  13. Install the right and left front stabilizer bar links at the lower control arms.
  14.  
  15. Install the right wheel splash shield
  16.  
  17. Install the right front wheel.
  18.  
  19. Install the front air deflector.
  20.  
  21. Install and tension the accessory drive belt.
  22.  
  23. Connect the negative battery cable.
  24.  

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the accessory drive belt.
  6.  
  7. Remove the alternator upper mounting bolts.
  8.  
  9. Raise and support the vehicle.
  10.  
  11. Remove the front air deflector.
  12.  
  13. Remove the right front wheel.
  14.  
  15. Remove the right wheel splash shield
  16.  
  17. Remove the right and left front stabilizer bar links at the lower control arms.
  18.  
  19. Rotate the stabilizer bar down enough to access the alternator.
  20.  
  21. Remove the lower alternator mounting bolt.
  22.  
  23. Disconnect the alternator wiring connector.
  24.  
  25. Remove the positive cable nut.
  26.  
  27. Remove the alternator through the wheelhouse opening.

    Click image to see an enlarged view

    Fig. Alternator mounting-4.6L engine

  28.  

To install:

  1. Install alternator positive lead and tighten to 111 inch lbs. (13 Nm).
  2.  
  3. Connect the wiring connector.
  4.  
  5. Install the lower alternator mounting bolt but do not tighten.
  6.  
  7. Lower the vehicle.
  8.  
  9. Install the upper mounting bolts. Tighten all bolts to 37 ft. lbs. (50 Nm).
  10.  
  11. Raise the vehicle.
  12.  
  13. Install the right and left front stabilizer bar links at the lower control arms.
  14.  
  15. Install the right wheel splash shield
  16.  
  17. Install the right front wheel.
  18.  
  19. Install the front air deflector.
  20.  
  21. Install and tension the accessory drive belt.
  22.  
  23. Connect the negative battery cable.
  24.  

 
label.common.footer.alt.autozoneLogo