Toyota Pick-ups/Land Cruiser/4Runner 1989-1996

Ignition Coil Pack

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TESTING



See Figure 1

This test may be performed while the engine is cold or hot. A cold engine has a coolant temperature of less than 122°F (50°C).

  1. Remove the air cleaner cap and the Mass Air Flow (MAF) sensor assembly.
  2.  
  3. Disconnect the wires from the coils.
  4.  
  5. Disconnect the coil harnesses. 4'>
  6.  
  7. Inspect the primary coil resistance. Using a ohmmeter, measure the resistance between the positive and negative primary terminals.

    Cold-0.67-1.05 ohms
     
    Hot-0.85-1.23 ohms
     

  8.  



Click image to see an enlarged view

Fig. Fig. 1: Check the primary resistance as shown

  1. If the coil resistance is not as noted, replace the coil.
  2.  
  3. Inspect the secondary coil resistance. Using a ohmmeter, measure the resistance between the positive primary terminal and the spark plug wire.

    Cold-9.3-16.0k ohms
     
    Hot-11.7-18.8k ohms
     

  4.  
  5. If the coil resistance is not as noted, replace the coil.
  6.  
  7. Reinstall the coils.
  8.  
  9. Reconnect the coil harnesses.
  10.  
  11. Install the wires to the coils.
  12.  
  13. Install the air cleaner cap and the MAF sensor.
  14.  

REMOVAL & INSTALLATION



See Figures 2 and 3



Click image to see an enlarged view

Fig. Fig. 2: Exploded view of the ignition coil mountings



Click image to see an enlarged view

Fig. Fig. 3: Each coil is secured by a bolt

  1. Remove the air cleaner cap and the Mass Air Flow (MAF) sensor assembly.
  2.  
  3. Disconnect and label the wires from the coils.
  4.  
  5. Unplug the connectors from the ignition coils. Remove the bolts and coils from the left cylinder head. Arrange the coils in the correct order for installation.
  6.  

To install:
  1. Install the coils on the cylinder heads in the reverse order of removal. Make certain the correct coil is replaced in the same place where it was removed. Tighten the mounting bolts to 69 inch lbs. (8 Nm).
  2.  
  3. Attach the plug wires to the coils.
  4.  
  5. Install the MAF sensor and the air cleaner cap.
  6.  
  7. Start the engine and check for proper operation.
  8.  

 
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