Acura CL Integra NSX RL RSX TL TSX 2001-2006

Alternator

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Removal & Installation



1.8L And 3.5L Engines
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following: Both battery cables4 prong connector and the black wire from the rear of the alternatorAlternator adjusting bolt(s)Mounting bolt(s)Alternator beltAlternator assembly

    Both battery cables
     
    4 prong connector and the black wire from the rear of the alternator
     
    Alternator adjusting bolt(s)
     
    Mounting bolt(s)
     
    Alternator belt
     
    Alternator assembly
     

  4.  

To install:

  1. Install or connect the following: Alternator assemblyMounting bolts and tighten them to 33 ft. lbs. (44 Nm)Alternator adjusting bolt, hand tightAlternator belt

    Alternator assembly
     
    Mounting bolts and tighten them to 33 ft. lbs. (44 Nm)
     
    Alternator adjusting bolt, hand tight
     
    Alternator belt
     

  2.  
  3. Adjust alternator belt to tension.
  4.  
  5. Tighten the 8 x 1.25mm locknut/lock bolt(s) to 16 ft. lbs. (22 Nm).
  6.  
  7. Install or connect the following: 4 prong connector and the black wire to the rear of the alternatorBoth battery cables

    4 prong connector and the black wire to the rear of the alternator
     
    Both battery cables
     

  8.  


WARNING
Be sure to adjust the alternator belt to the proper tension or alternator bearing failure may occur.


NOTE
The Powertrain Control Module (PCM) idle memory must be reset after reconnecting the battery. Start the engine and hold it at 3000 rpm until the cooling fan comes on. Then allow the engine to idle for about 5 minutes with all accessories OFF and with the transmission in Park or Neutral.

2.0L Engines
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following: Both battery cablesDrive beltAuto tensionerConnector and the black wire from the rear of the alternatorMounting bolt(s)Alternator assembly

    Both battery cables
     
    Drive belt
     
    Auto tensioner
     
    Connector and the black wire from the rear of the alternator
     
    Mounting bolt(s)
     
    Alternator assembly
     

  4.  

To install:

  1. Install or connect the following: Alternator assemblyMounting bolts and tighten them to 16 ft. lbs. (22 Nm)Connector and the black wire to the rear of the alternatorAuto tensionerDrive beltBoth battery cables

    Alternator assembly
     
    Mounting bolts and tighten them to 16 ft. lbs. (22 Nm)
     
    Connector and the black wire to the rear of the alternator
     
    Auto tensioner
     
    Drive belt
     
    Both battery cables
     

  2.  


WARNING
Be sure to adjust the alternator belt to the proper tension or alternator bearing failure may occur.


NOTE
The Powertrain Control Module (PCM) idle memory must be reset after reconnecting the battery. Start the engine and hold it at 3000 rpm until the cooling fan comes on. Then allow the engine to idle for about 5 minutes with all accessories OFF and with the transmission in Park or Neutral.

2.4L Engines
2001-03 TL Models
  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Remove or disconnect the following:

    Both battery cables
     
    Adjusting bolts
     
    Accessory drive belt
     
    Mounting bolts
     

  4.  
  5. Turn the alternator 90°in a counter-clockwise direction.

    Alternator
     
    4 prong connector
     
    Harness clip and bracket assembly
     
    Black wire from the terminal
     
    Alternator from the vehicle
     

  6.  

To install:

  1. Install or connect the following:
    NOTE
    There is no belt tension adjustment due to the use of an automatic tensioner.



    Alternator
     
    Black wire
     
    Harness clip and bracket assembly and t tighten the bolt to 104 inch lbs. (12 Nm)
     
    4 prong connector
     
    Mounting bolts and tighten the 10 x 1.25mm bolts to 33 ft. lbs. (44 Nm), the 8 x 1.25mm locknut/lock bolt(s) to 16 ft. lbs. (22 Nm) and the 6 x 1.0mm 104 inch lbs. (12 Nm)
     
    Accessory drive belt
     

  2.  
  3. The Powertrain Control Module (PCM) idle memory must be reset after reconnecting the battery. Start the engine and hold it at 3000 rpm until the cooling fan comes on. Then allow the engine to idle for about 5 minutes with all accessories OFF and with the transmission in Park or Neutral.
  4.  
  5. Connect the positive, then the negative battery cable.
  6.  

2001-04 RL Models
  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Remove or disconnect the following:

    Both battery cables
     
    4 prong connector and the black wire from the rear of the alternator
     
    Alternator adjusting bolt(s)
     
    Mounting bolt(s)
     
    Alternator belt
     
    Alternator assembly
     

  4.  

To install:

  1. Install or connect the following:

    Alternator assembly
     
    Mounting bolts and tighten them to 33 ft. lbs. (44 Nm)
     
    Alternator adjusting bolt, hand tight
     
    Alternator belt
     

  2.  
  3. Adjust alternator belt to tension.
  4.  
  5. Tighten the 8 x 1.25mm locknut/lock bolt(s) to 16 ft. lbs. (22 Nm).
  6.  
  7. Install or connect the following:
    WARNING
    Be sure to adjust the alternator belt to the proper tension or alternator bearing failure may occur.


    NOTE
    The Powertrain Control Module (PCM) idle memory must be reset after reconnecting the battery. Start the engine and hold it at 3000 rpm until the cooling fan comes on. Then allow the engine to idle for about 5 minutes with all accessories OFF and with the transmission in Park or Neutral.



    4 prong connector and the black wire to the rear of the alternator
     
    Both battery cables
     

  8.  

2004-06 TL Models
  1. Before servicing the vehicle, refer to the precautions section.
    NOTE
    Make sure you have the anti-theft code for the radio, and the navigation system, then write down the radio channel presets. Make sure the ignition switch is OFF. Disconnect the negative cable from the battery first, then disconnect the positive cable.

  2.  
  3. Disconnect the A/C condenser fan motor connector and the A/C compressor clutch connector, then remove the reserve tank.
  4.  
  5. Remove the two bolts, loosen bolt, and then remove the A/C condenser fan shroud.
  6.  
  7. Remove the drive belt.
  8.  
  9. Disconnect the alternator connector and the BLK wire from the alternator.
  10.  
  11. Remove the bolt retaining the harness bracket
  12.  
  13. Remove the mounting bolt, alternator bracket mounting bolt and the remove the alternator.
  14.  

To install:

  1. Installation is the reverse of removal. Tighten the mounting bolt to 33 ft. lbs. (44 Nm), the bracket bolt to 16 ft. lbs. (22 Nm) and the harness bolt to 9 ft. lbs. (12 Nm).

    Click image to see an enlarged view

    Fig. Alternator mounting-2004-06 TL model

  2.  

2005-06 RL Models

Make sure you have the anti-theft codes for the radio and the navigation system, then write down the audio presets. Make sure the ignition switch is OFF.

  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Remove the right upper fender trim, battery trim, left upper fender trim, then remove the upper grille cover .
  4.  
  5. Disconnect the negative cable from the battery, then disconnect the positive cable.
  6.  
  7. Remove the splash shield.
  8.  
  9. Remove the harness clamps and connector from the A/C condenser fan shroud.
  10.  
  11. Loosen the two bolts securing the A/C condenser fan shroud.
  12.  
  13. Disconnect the fan motor connector, and remove the reserve tank .
  14.  
  15. Remove the two bolts, then remove the A/C condenser fan shroud.
  16.  
  17. Remove the drive belt.
  18.  
  19. Disconnect the alternator connector and BLK wire from the alternator.
  20.  
  21. Remove the bolt securing the harness holder.
  22.  
  23. Remove the mounting bolt and alternator bracket mounting bolt, then remove the alternator
  24.  

To install:

  1. Installation is the reverse of removal. Tighten the upper bolt to 16 ft. lbs. (22 Nm) and the lower bolt to 33 ft. lbs. (44 Nm).
  2.  

3.0L Engines
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following: Battery coverBoth battery cablesEngine coverAccessory drive beltFan motor connector and A/C compressor clutch wiring connector from the fan shroudA/C condenser fan shroud assemblyGround cable4 prong connectorAlternator and bracket assembly

    Battery cover
     
    Both battery cables
     
    Engine cover
     
    Accessory drive belt
     
    Fan motor connector and A/C compressor clutch wiring connector from the fan shroud
     
    A/C condenser fan shroud assembly
     
    Ground cable
     
    4 prong connector
     
    Alternator and bracket assembly
     

  4.  

To install:

  1. Install or connect the following: Alternator and bracket assembly and tighten the 10 x 1.25 mounting bolts to 33 ft. lbs. (44 Nm) and the 8 x 1.25mm locknut/lock bolt(s) to 16 ft. lbs. (22 Nm)4 prong connectorGround cableA/C condenser fan shroud assemblyAccessory drive beltFront engine cover

    Alternator and bracket assembly and tighten the 10 x 1.25 mounting bolts to 33 ft. lbs. (44 Nm) and the 8 x 1.25mm locknut/lock bolt(s) to 16 ft. lbs. (22 Nm)
     
    4 prong connector
     
    Ground cable
     
    A/C condenser fan shroud assembly
     
    Accessory drive belt
     
    Front engine cover
     

  2.  


NOTE
There is no belt tension adjustment due to the use of an automatic tensioner.



Both battery cables
 
Battery cover
 

  1. The Powertrain Control Module (PCM) idle memory must be reset after reconnecting the battery. Start the engine and hold it at 3000 rpm until the cooling fan comes on. Then allow the engine to idle for about 5 minutes with all accessories OFF and with the transmission in Park or Neutral.
  2.  

3.2L Engine
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following: Both battery cablesAdjusting boltsAccessory drive beltMounting bolts

    Both battery cables
     
    Adjusting bolts
     
    Accessory drive belt
     
    Mounting bolts
     

  4.  
  5. Turn the alternator 90°in a counter-clockwise direction. Alternator4 prong connectorHarness clip and bracket assemblyBlack wire from the terminalAlternator from the vehicle

    Alternator
     
    4 prong connector
     
    Harness clip and bracket assembly
     
    Black wire from the terminal
     
    Alternator from the vehicle
     

  6.  

To install:

  1. Install or connect the following: AlternatorBlack wireHarness clip and bracket assembly and t tighten the bolt to 104 inch lbs. (12 Nm)4 prong connectorMounting bolts and tighten the 10 x 1.25mm bolts to 33 ft. lbs. (44 Nm), the 8 x 1.25mm locknut/lock bolt(s) to 16 ft. lbs. (22 Nm) and the 6 x 1.0mm 104 inch lbs. (12 Nm)Accessory drive belt

    Alternator
     
    Black wire
     
    Harness clip and bracket assembly and t tighten the bolt to 104 inch lbs. (12 Nm)
     
    4 prong connector
     
    Mounting bolts and tighten the 10 x 1.25mm bolts to 33 ft. lbs. (44 Nm), the 8 x 1.25mm locknut/lock bolt(s) to 16 ft. lbs. (22 Nm) and the 6 x 1.0mm 104 inch lbs. (12 Nm)
     
    Accessory drive belt
     

  2.  


NOTE
There is no belt tension adjustment due to the use of an automatic tensioner.

  1. The Powertrain Control Module (PCM) idle memory must be reset after reconnecting the battery. Start the engine and hold it at 3000 rpm until the cooling fan comes on. Then allow the engine to idle for about 5 minutes with all accessories OFF and with the transmission in Park or Neutral.
  2.  
  3. Connect the positive, then the negative battery cable.
  4.  

CL Models
  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Remove or disconnect the following:

    Both battery cables
     
    Adjusting bolts
     
    Accessory drive belt
     
    Mounting bolts
     

  4.  
  5. Turn the alternator 90°in a counter-clockwise direction.

    Alternator
     
    4 prong connector
     
    Harness clip and bracket assembly
     
    Black wire from the terminal
     
    Alternator from the vehicle
     

  6.  

To install:

  1. Install or connect the following:
    NOTE
    There is no belt tension adjustment due to the use of an automatic tensioner.



    Alternator
     
    Black wire
     
    Harness clip and bracket assembly and tighten the bolt to 104 inch lbs. (12 Nm)
     
    4 prong connector
     
    Mounting bolts and tighten the 10 x 1.25mm bolts to 33 ft. lbs. (44 Nm), the 8 x 1.25mm locknut/lock bolt(s) to 16 ft. lbs. (22 Nm) and the 6 x 1.0mm 104 inch lbs. (12 Nm)
     
    Accessory drive belt
     

  2.  
  3. The Powertrain Control Module (PCM) idle memory must be reset after reconnecting the battery. Start the engine and hold it at 3000 rpm until the cooling fan comes on. Then allow the engine to idle for about 5 minutes with all accessories OFF and with the transmission in Park or Neutral.
  4.  
  5. Connect the positive, then the negative battery cable.
  6.  

Integra Models
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Both battery cables
     
    4 prong connector and the black wire from the rear of the alternator
     
    Alternator adjusting bolt(s)
     
    Mounting bolt(s)
     
    Alternator belt
     
    Alternator assembly
     

  4.  

To install:

  1. Install or connect the following:

    Alternator assembly
     
    Mounting bolts and tighten them to 33 ft. lbs. (44 Nm)
     
    Alternator adjusting bolt, hand tight
     
    Alternator belt
     

  2.  
  3. Adjust alternator belt to tension.
  4.  
  5. Tighten the 8 x 1.25mm locknut/lock bolt(s) to 16 ft. lbs. (22 Nm).
  6.  
  7. Install or connect the following:
    WARNING
    Be sure to adjust the alternator belt to the proper tension or alternator bearing failure may occur.


    NOTE
    The Powertrain Control Module (PCM) idle memory must be reset after reconnecting the battery. Start the engine and hold it at 3000 rpm until the cooling fan comes on. Then allow the engine to idle for about 5 minutes with all accessories OFF and with the transmission in Park or Neutral.



    4 prong connector and the black wire to the rear of the alternator
     
    Both battery cables
     

  8.  

NSX Models
3.0L Engine
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Battery cover
     
    Both battery cables
     
    Engine cover
     
    Accessory drive belt
     
    Fan motor connector and A/C compressor clutch wiring connector from the fan shroud
     
    A/C condenser fan shroud assembly
     
    Ground cable
     
    4 prong connector
     
    Alternator and bracket assembly
     

  4.  

To install:

  1. Install or connect the following:
    NOTE
    There is no belt tension adjustment due to the use of an automatic tensioner.



    Alternator and bracket assembly and tighten the 10 x 1.25 mounting bolts to 33 ft. lbs. (44 Nm) and the 8 x 1.25mm locknut/lock bolt(s) to 16 ft. lbs. (22 Nm)
     
    4 prong connector
     
    Ground cable
     
    A/C condenser fan shroud assembly
     
    Accessory drive belt
     
    Front engine cover
     



    Both battery cables
     
    Battery cover
     

  2.  
  3. The Powertrain Control Module (PCM) idle memory must be reset after reconnecting the battery. Start the engine and hold it at 3000 rpm until the cooling fan comes on. Then allow the engine to idle for about 5 minutes with all accessories OFF and with the transmission in Park or Neutral.
  4.  

3.2L Engine
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Both battery cables
     
    Adjusting bolts
     
    Accessory drive belt
     
    Mounting bolts
     

  4.  
  5. Turn the alternator 90°in a counter-clockwise direction.

    Alternator
     
    4 prong connector
     
    Harness clip and bracket assembly
     
    Black wire from the terminal
     
    Alternator from the vehicle
     

  6.  

To install:

  1. Install or connect the following:
    NOTE
    There is no belt tension adjustment due to the use of an automatic tensioner.



    Alternator
     
    Black wire
     
    Harness clip and bracket assembly and t tighten the bolt to 104 inch lbs. (12 Nm)
     
    4 prong connector
     
    Mounting bolts and tighten the 10 x 1.25mm bolts to 33 ft. lbs. (44 Nm), the 8 x 1.25mm locknut/lock bolt(s) to 16 ft. lbs. (22 Nm) and the 6 x 1.0mm 104 inch lbs. (12 Nm)
     
    Accessory drive belt
     

  2.  
  3. The Powertrain Control Module (PCM) idle memory must be reset after reconnecting the battery. Start the engine and hold it at 3000 rpm until the cooling fan comes on. Then allow the engine to idle for about 5 minutes with all accessories OFF and with the transmission in Park or Neutral.
  4.  
  5. Connect the positive, then the negative battery cable.
  6.  

RSX Models
  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Remove or disconnect the following:

    Both battery cables
     
    Drive belt
     
    Auto tensioner
     
    Connector and the black wire from the rear of the alternator
     
    Mounting bolt(s)
     
    Alternator assembly
     

  4.  

To install:

  1. Install or connect the following:
    WARNING
    Be sure to adjust the alternator belt to the proper tension or alternator bearing failure may occur.


    NOTE
    The Powertrain Control Module (PCM) idle memory must be reset after reconnecting the battery. Start the engine and hold it at 3000 rpm until the cooling fan comes on. Then allow the engine to idle for about 5 minutes with all accessories OFF and with the transmission in Park or Neutral.



    Alternator assembly
     
    Mounting bolts and tighten them to 16 ft. lbs. (22 Nm)
     
    Connector and the black wire to the rear of the alternator
     
    Auto tensioner
     
    Drive belt
     
    Both battery cables
     

  2.  

TSX Models
  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Note the radio security code and the radio presets.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable, then the positive
     
    Drive belt
     
    Auto-tensioner
     
    Connectors from the alternator
     
    3 alternator mounting bolts and the alternator

    Click image to see an enlarged view

    Fig. Alternator mounting-TSX models

     

  6.  

To install:



Alternator and 3 mounting bolts. Torque the bolts to 16 ft. lbs. (22 Nm).
 
Electrical connectors
 
Auto-tensioner
 
Drive belt
 
Positive, then negative battery cables
 

  1. Enter the security code and radio presets
  2.  

Testing



Output Voltage Test
  1. Determine if any Diagnostic Trouble Codes (DTC-s) exist.
  2.  
  3. Before starting the test, make sure the battery is in good condition and is fully charged. Check the conditions of the battery cables.
  4.  
  5. Perform the voltage drop test to ensure clean and tight alternator/battery electrical connections.
  6.  
  7. Be sure the alternator drive belt is properly tensioned.
  8.  
  9. A volt/amp tester equipped with both a battery load control (carbon pile rheostat) and an inductive-type pickup clamp (ammeter probe) will be used for this test. Make sure to follows all directions supplied with the tester. If you are using a tester equipped with an inductive-type clamp, you don-t have to remove the wiring from the alternator.
  10.  
  11. Start the engine and let it run until it reaches normal operating temperature, then shut the engine OFF .
  12.  
  13. Make sure all electrical accessories and lights are turned OFF.
  14.  
  15. Connect the volt/amp tester leads to the battery. Be sure the carbon pile rheostat control is in the OPEN or OFF position before connecting the leads.
  16.  
  17. Connect the inductive clamp (ammeter probe), following the instructions supplied with the test equipment.
  18.  
  19. If a volt/amp tester is not equipped with an engine tachometer, connect a separate tachometer to the engine.
  20.  
  21. Fully engage the parking brake.
  22.  
  23. Start the engine, then bring the engine speed up to 2,500 rpm.
    WARNING
    This load test must be performed within 15 seconds to prevent damage to the test equipment!

  24.  
  25. With the engine speed held at 2,500 rpm, slowly adjust the rheostat control (load) on the tester to get the highest amperage reading. Do not let the voltage drop below 12 volts. Record the reading.
    NOTE
    On certain brands of test equipment, this load will be applied automatically. Be sure to read the operating manual supplied with the test equipment before performing the test.

  26.  
  27. The ammeter reading must meet the minimum test amps specification of 75 amps.
  28.  
  29. Rotate the load control to the OFF position.
  30.  
  31. Continue holding the engine speed at 2,500 rpm. If the circuitry is OK, the amperage should drop below 15-20 amps. With all of the electrical accessories and vehicle lighting off, this could take several minutes of engine operation.
  32.  
  33. After the procedure is complete, remove the volt/amp tester.
  34.  

Voltage Drop Test

NOTE
These tests will show the amount of voltage drop across the alternator output wire from the alternator output (B+) terminal to the battery positive post. They will also show the amount of voltage drop from the ground (-) terminal on the alternator.

A voltmeter with a 0-18 volt DC scale should be used for these tests. By repositioning the voltmeter test leads, the point of high resistance (voltage drop) can easily be found. Test points on the alternator can be reached by either removing the air cleaner housing or below by raising the vehicle.

  1. Before starting the test, make sure the battery is in good condition and is fully charged. Check the conditions of the battery cables.
  2.  
  3. Start the engine, let it warm up to normal operating temperatures, then turn the engine OFF .
  4.  
  5. Connect an engine tachometer, following the manufacturer-s directions.
  6.  
  7. Make sure the parking brake is fully engaged.
  8.  
  9. Start the engine, then place the blower on HIGH, and turn on the high beam headlamps and interior lamps.
  10.  
  11. Bring the engine speed up to 2,400 rpm and hold it there.
  12.  
  13. To test the ground (-) circuitry, perform the following:
    1. Touch the negative lead of the voltmeter directly to the positive battery terminal.
    2.  
    3. Touch the positive lead of the voltmeter to the B+ output terminal stud on the alternator (NOT the terminal mounting nut). The voltage should be no higher than 0.6 volts. If the voltage is higher than 0.6 volts, touch the test lead to the terminal mounting stud nut, and then to the wiring connector. If the voltage is now below 0.6 volts, look for dirty, loose or poor connections at this point. A voltage drop test may be performed at each ground (-) connection in the circuit to locate the excessive resistance.
    4.  

  14.  
  15. To test the positive (+) circuitry, perform the following:
    1. Touch the positive lead of the voltmeter directly to the negative battery terminal.
    2.  
    3. Touch the negative lead of the voltmeter to the ground terminal stud on the alternator case (NOT the terminal mounting nut). The voltage should be no higher than 0.3 volts. If the voltage is higher than 0.3 volts, touch the test lead to the terminal mounting stud nut, and then to the wiring connector. If the voltage is now below 0.3 volts, look for dirty, loose or poor connections at this point. A voltage drop test may be performed at each positive (+) connection in the circuit to locate the excessive resistance.
    4.  

  16.  
  17. This test can also be performed between the alternator case and the engine. If the test voltage is higher than 0.3 volts, check for corrosion at the alternator mounting points or loose alternator mounting.
  18.  

 
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