Aura, Outlook 2007

Ignition Coil

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Removal & Installation



2.4L Engine
  1. Remove the intake manifold cover.
  2.  
  3. Disconnect the engine wiring harness electrical connectors from the ignition coil.
  4.  
  5. Remove the ignition coil bolt(s).
  6.  
  7. Remove the ignition coil(s).
  8.  

To install:

  1. Installation is the reverse of removal. Tighten the coli bolts to 89 in. lbs. (10 Nm).
  2.  

3.5L Engine
  1. Remove the intake manifold cover.
  2.  
  3. Disconnect the engine wiring harness electrical connector from the Manifold Absolute Pressure (MAP) sensor.
  4.  
  5. Disconnect the engine wiring harness electrical connector from the ignition coil.
  6.  
  7. Reposition the brake booster vacuum hose clamp at the upper intake manifold.
  8.  
  9. Remove the brake booster vacuum hose from the upper intake manifold.
  10.  
  11. Remove the left side spark plug wires from the ignition coils.
  12.  
  13. Remove the right side spark plug wires from the ignition coils.
  14.  
  15. Remove the Heated Oxygen Sensor (HO2S) electrical connector rosebud clip from the ignition coil bracket.
  16.  
  17. Remove the ignition coil bolts and nuts.
  18.  
  19. Remove the ignition coil.
  20.  

To install:

  1. Install the ignition coil.
  2.  
  3. Install the ignition coil bolts and nuts and tighten to 18 ft. lbs. (25 Nm).
  4.  
  5. Install the HO2S electrical connector rosebud clip to the ignition coil bracket.
  6.  
  7. Install the right side spark plug wires to the ignition coils.
  8.  
  9. Install the left side spark plug wires to the ignition coils.
  10.  
  11. Install the brake booster vacuum hose to the upper intake manifold.
  12.  
  13. Position the brake booster vacuum hose clamp at the upper intake manifold.
  14.  
  15. Connect the engine wiring harness electrical connector to the ignition coil.
  16.  
  17. Connect the engine wiring harness electrical connector to the MAP sensor.
  18.  
  19. Install the intake manifold cover.
  20.  

3.6L Engine
  1. Remove the fuel injector sight shield.
  2.  
  3. Disconnect the engine wiring harness electrical connector(s) from the ignition coil(s).
  4.  
  5. If removing the number 5 cylinder ignition coil, remove the Evaporative Emission (EVAP) canister purge tube.
  6.  
  7. Remove the ignition coil bolt(s).
  8.  
  9. Remove the ignition coil(s).
  10.  

To install:

  1. Install the ignition coil(s).
  2.  
  3. Install the ignition coil bolt(s) and tighten to 89 in. lbs. (10 Nm).
  4.  
  5. If the number 5 cylinder ignition coil was removed, install the EVAP canister purge tube.
  6.  
  7. Connect the engine wiring harness electrical connector(s) to the ignition coil(s).
  8.  
  9. Install the fuel injector sight shield.
  10.  

Testing



2.4L Engine
  1. Turn the ignition OFF, disconnect the ignition coil/module harness connector at the affected ignition coil/modules.
  2.  
  3. With the ignition OFF for 90 seconds, test for less than 5 ohms of resistance between the ground circuit terminal 1or A and ground. If greater than the specified value, test the ground circuit for an open/high resistance.
  4.  
  5. With the ignition OFF for 90 seconds, test for less than 5 ohms of resistance between the low reference circuit terminal 2 or B and ground. If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
    NOTE
    If the ignition fuse is open, it will be necessary to test the spliced ignition circuits and the components for a short to ground.

  6.  
  7. Turn the ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 4 or D and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
  8.  
  9. Exchange the affected ignition coil/module with the ignition coil/module of a good cylinder.

    Click image to see an enlarged view

    Fig. Ignition coil terminals-2.4L engine (1) Ground (2) Low Reference (3) IC Control (4) Ignition Voltage

  10.  

3.6L Engine
  1. Turn OFF the ignition.
    NOTE
    This engine application uses 2 fuses, one for each bank, to supply ignition 1 voltage to the ignition module/coil assemblies and also to the fuel injectors. A good indication that a fuse is open is that all 4 misfire counters are incrementing on one side of the engine.

  2.  
  3. Inspect both fuse that supplies ignition voltage to the ignition module/coils. If a fuse is open, test all 8 ignition voltage circuits to the ignition module/coils or the fuel injectors on the engine bank, for a short to ground.
  4.  
  5. Disconnect the ignition module/coil, and the fuel injector electrical connectors, for the engine bank that has the open fuse. Replace the open fuse with a new fuse.
  6.  
  7. Turn the ignition ON and engine OFF.
  8.  
  9. Reconnect each ignition module/coil, and fuel injector electrical connectors, one at a time. If the fuse opens when connecting an ignition module/coil or fuel injector electrical connector, then replace the component that caused the fuse to open.
  10.  
  11. Turn the ignition OFF, disconnect the appropriate ignition module/coil electrical connector.
  12.  
  13. Turn the ignition ON, verify that a test lamp illuminates between the ignition voltage circuit and ground. If the test lamp does not illuminate test the ignition voltage circuit for an open/high resistance.
  14.  
  15. Verify that a test lamp illuminates between the ignition module/coil ground circuit and B+. If the test lamp does not illuminate, test the ignition module/coil ground circuit for an open/high resistance.
  16.  
  17. Exchange the misfiring cylinder, ignition module/coil assembly with the ignition module/coil assembly from a non-misfiring cylinder.
  18.  
  19. Start and idle the engine. Observe the misfire counters on the scan tool. If the misfire transfers with the suspect ignition module/coil, then replace the ignition module/coil assembly. If the misfire does not transfer with the suspect ignition module/coil, then measure the resistance of the IC circuit. The IC circuit should measure less than 5 ohms. If the circuit tests normal, replace the ECM.
  20.  

 
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