Toyota Camry 1983-1996 Repair Guide

Ignition Coil

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TESTING



1994-95 Models

See Figures 1, 2, 3 and 4

  1. Turn the ignition key to the OFF position. Disconnect the negative battery cable. Wait at least 90 seconds from the time the negative battery was disconnected to start work.
  2.  



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Fig. Fig. 1: Disconnect the negative battery cable-1MZ-FE engine


CAUTION
Work must be started after 90 seconds from the time that the ignition switch is turned to the LOCK position and the negative battery cable is disconnected from the battery.

  1. Using a 5mm hexagon wrench, remove the 2 cap nuts and the V-bank cover.
  2.  



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Fig. Fig. 2: Remove the V-bank cover, a 5mm hexagon wrench will be needed-1MZ-FE engine

  1. Disconnect the ignition coil wiring from the coil being tested.
  2.  



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Fig. Fig. 3: Disconnect the ignition coil wiring from the component being tested-1MZ-FE engine

  1. Insect the primary coil resistance using an ohmmeter. Measure the resistance (cold) between the positive and negative terminals. Resistance should be between 0.54-0.84 ohms.
  2.  



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Fig. Fig. 4: Attach an ohmmeter to the positive and negative terminals of the coil-1MZ-FE engine

  1. If the resistance is not within specifications, replace the ignition coil.
  2.  
  3. Reattach the ignition coil wiring.
  4.  
  5. Reinstall the V-bank cover. Push on the cover until a click is felt, then tighten the cap nuts.
  6.  
  7. Connect the negative battery cable. Reset any digital equipment such as radio memory and the clock if necessary.
  8.  

1996 Models

See Figures 4 and 5

The ignition coils should be removed and tested one at a time so not to mix them up.

  1. Disconnect and label the wires from the coils.
  2.  
  3. Disconnect the ignition coil harness.
  4.  
  5. Using an ohmmeter, measure the resistance between the positive and negative terminals of the coil. Primary coil, resistance (cold ) should be between 0.70-0.94 ohms.
  6.  
  7. Remove the ignition coil.
  8.  
  9. Using an ohmmeter, measure the resistance between the positive and negative terminals of the coil. Secondary coil, resistance (cold ) should be between 10.8-14.9 ohms.
  10.  



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Fig. Fig. 5: With the coil removed measure the secondary resistance-1996 1MZ-FE engine

  1. If the resistance is not within specifications, replace the ignition coil that is faulty.
  2.  
  3. Reinstall the coil.
  4.  
  5. Reattach the coil harness.
  6.  
  7. Attach the coil wires to the appropriate coil.
  8.  
  9. Start the engine and check for proper operation.
  10.  

REMOVAL & INSTALLATION



See Figures 6, 7, 8, 9, 10 and 11

  1. Turn the ignition key to the OFF position.
  2.  
  3. Using a 5mm hexagon wrench, remove the 2 cap nuts and the V-bank cover.
  4.  



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Fig. Fig. 6: Remove these two 5mm screws from the V-bank cover-1MZ-FE engine



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Fig. Fig. 7: Lift the V-bank cover off to access the coils



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Fig. Fig. 8: The ignition coils are located on the top of the cylinder heads

The rear coils may be hard to access, a little bit of maneuvering may be necessary.

  1. Lable and disconnect the ignition coil wiring from the coils.
  2.  



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Fig. Fig. 9: Remove the bolts retaining the coils to the cylinder heads, one side at a time-1MZ-FE engine

  1. Remove the bolts retaining the right side coils from the cylinder head. Place each coil into position where it was taken from on a table. Do the same for the left side.
  2.  



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Fig. Fig. 10: Pull the coil out of the spark plug hole



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Fig. Fig. 11: Arrange the coils on a table in order-1MZ-FE engine

 
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