SRX 2004-2005

Ignition Coil Pack

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Removal & Installation



3.6L Engine
Bank 1
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Turn the ignition OFF .
  4.  
  5. Remove the engine cover.
    NOTE
    Do NOT disconnect the fuel pipes and/or hoses.

  6.  
  7. If you are replacing the ignition coil for cylinder 1 or 3, remove and reposition the intake manifold. Perform the following steps:
  8.  
  9. Remove or disconnect the following:
    NOTE
    Do NOT separate the upper intake manifold from the lower intake manifold.



    Disconnect the air cleaner duct from the throttle body.
     
    Disconnect the positive crankcase ventilation (PCV) hose from the right bank camshaft cover.
     



    Remove the intake manifold bolts.
     
    Remove the intake manifold brace bolts (1 and 2) and the brace.

    Click image to see an enlarged view

    Fig. Intake manifold brace bolts

     

  10.  
  11. Remove and reposition the upper intake manifold with the lower intake manifold in order to gain sufficient clearance for ignition coil removal.
  12.  
  13. Remove the ignition coil electrical connector(s).
  14.  
  15. Remove the ignition coil bolt(s).
  16.  
  17. Remove the ignition coil(s).

    Click image to see an enlarged view

    Fig. Bank 1 ignition coils-3.6L engine

  18.  

To install:

  1. Install or connect the following:

    Install the ignition coil(s).
     
    Install the ignition coil bolt(s) and tighten to 89 inch lbs. (10 Nm).
     
    Install the ignition coil electrical connector(s).
     

  2.  
  3. If removed, install the intake manifold.
  4.  
  5. Install the engine cover.
  6.  

Bank 2
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Turn the ignition OFF .
  4.  
  5. Remove the engine cover.
    NOTE
    Do NOT disconnect the fuel pipes and/or hoses.

  6.  
  7. If you are replacing the ignition coil for cylinder 2, remove and reposition the intake manifold. Perform the following steps:
  8.  
  9. Remove or disconnect the following:
    NOTE
    Do NOT separate the upper intake manifold from the lower intake manifold.



    Disconnect the air cleaner duct from the throttle body.
     
    Disconnect the positive crankcase ventilation (PCV) hose from the right bank camshaft cover.
     



    Remove the intake manifold bolts.
     
    Remove the intake manifold brace bolts (1 and 2) and the brace.

    Click image to see an enlarged view

    Fig. Intake manifold brace bolts

     

  10.  
  11. Remove and reposition the upper intake manifold with the lower intake manifold in order to gain sufficient clearance for ignition coil removal.
  12.  
  13. Remove the ignition coil electrical connector(s).
  14.  
  15. Remove the ignition coil bolt(s).
  16.  
  17. Remove the ignition coil(s).

    Click image to see an enlarged view

    Fig. Bank 2 ignition coils-3.6L engine

  18.  

To install:

  1. Install or connect the following:
  2.  
  3. Install the ignition coil(s).
  4.  
  5. Install the ignition coil bolt(s) and tighten to 89 inch lbs. (10 Nm).
  6.  
  7. Install the ignition coil electrical connector(s).
  8.  
  9. If removed, install the upper intake manifold.
  10.  

4.6L Engine
Bank 1
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove the fuel injector sight shield.
  4.  
  5. Remove the ignition coil cover from the cam cover by lifting straight up.

    Click image to see an enlarged view

    Fig. Bank 1 ignition coil cover-4.6L engine

  6.  
  7. Disconnect the ignition coil wiring harness electrical connector from the coil that needs to be replaced.
  8.  
  9. Remove the ignition coil retaining bolt.

    Click image to see an enlarged view

    Fig. Ignition coil bolt-4.6L engine

  10.  
  11. Carefully remove the ignition coil.
  12.  

To install:


NOTE
Ensure that the spark plug seals are in place when installing the ignition coil.

  1. Install or connect the following:
  2.  
  3. Install the ignition coil.
  4.  
  5. Install the ignition coil retaining bolt and tighten to 89 inch lbs. (10 Nm).
  6.  
  7. Reconnect the ignition coil electrical connector.
  8.  
  9. Install the ignition coil cover to the cam cover.
  10.  
  11. Install the fuel injector sight shield.
  12.  

Bank 2
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove the fuel injector sight shield.
  4.  
  5. Remove the ignition coil cover from the cam cover by lifting straight up.

    Click image to see an enlarged view

    Fig. Bank 2 ignition coil cover-4.6L engine

  6.  
  7. Disconnect the ignition coil wiring harness electrical connector from the coil that needs to be replaced.
  8.  
  9. Remove the ignition coil retaining bolt.

    Click image to see an enlarged view

    Fig. Ignition coil bolt-4.6L engine

  10.  
  11. Carefully remove the ignition coil.
  12.  

To install:


NOTE
Ensure that the spark plug seals are in place when installing the ignition coil.

  1. Install or connect the following:
  2.  
  3. Install the ignition coil.
  4.  
  5. Install the ignition coil retaining bolt and tighten to 89 inch lbs. (10 Nm).
  6.  
  7. Reconnect the ignition coil electrical connector.
  8.  
  9. Install the ignition coil cover to the cam cover.
  10.  
  11. Install the fuel injector sight shield.
  12.  

Testing



3.6L Engine


Click image to see an enlarged view

Fig. Ignition coil pack harness terminal identification-3.6L engines

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Ignition OFF , disconnect the harness connector of the ignition coil.
  4.  
  5. Ignition ON , load test for battery voltage between the ignition voltage circuit terminal D and ground.
  6.  
  7. If less than battery voltage, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test all the components connected to the ignition voltage circuit and replace as necessary.
  8.  
  9. Crank or start the engine. Test for 200-400 mV between the terminal C and ground. If less than the specified value, test the IC circuit for a short to ground or an open/high resistance.
  10.  
  11. If the circuit/connection tests normal, replace the ECM. If greater than the specified value, test the IC circuit for a short to voltage. If the circuit/connection tests normal, replace the ECM.
  12.  
  13. Ignition OFF , test for 5 ohms or less between the low reference circuit terminal B and the ECM housing. If greater than the specified value, test for an open/high resistance in the low reference circuit. If the circuit/connection tests normal, replace the ECM.
  14.  
  15. Test for 5 ohms or less between the ground circuit terminal A and ground. If greater than the specified value, repair the open, or high resistance in the ground circuit.
  16.  
  17. If all circuits and connections test normal but still no or weak spark, replace the ignition coil.
  18.  

4.6L Engine


Click image to see an enlarged view

Fig. Ignition coil pack harness terminal identification-4.6L engines

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Turn OFF the ignition.
  4.  
  5. Inspect the fuse that supplies voltage to the ignition coil/modules. If the fuse is open, then test the spliced circuits and the individual ignition coil/modules for a short to ground.
  6.  
  7. Disconnect the affected ignition coil/module.
  8.  
  9. Connect a test lamp between the ignition coil/module ignition 1 voltage circuit and a good ground. With the test lamp still connected, measure for battery voltage between the ignition 1 voltage circuit and a good ground. If the voltage is not within 1 volt of battery voltage, repair the high resistance or the open in the ignition 1 voltage circuit.
  10.  
  11. Turn OFF the ignition, and all electrical accessories. Allow sufficient time for all of the control modules to power down before taking a resistance measurement. Measure for a proper value of less than 5 ohms of resistance between the ground circuit of the affected ignition coil/module and a good ground. If the resistance is more than 5 ohms, repair the high resistance or the open in the ground circuit.
  12.  
  13. Exchange the affected ignition coil/module with the ignition coil/module of a good cylinder. Start the engine and observe the scan tool. If the misfire transfers with the suspect ignition coil/module, replace as needed. If the misfire does not transfer with the suspect ignition coil/module, observe the component testing procedures below, and replace the spark plug if needed.
  14.  

 
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