Nissan Z - ZX 1970-1988 Repair Guide

Ignition Coil

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See Figure 1



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Fig. Fig. 1: Ignition coil mounted to inside of left front fender-1987 300 ZX model

TESTING



  1. To check the spark, perform the following:
    1. Disconnect the coil wire from the distributor cap.
    2.  

  2.  

On Electronic Fuel Injection(EFI) systems, disconnect the EFI fusible link connector and the cold start valve harness connector.

    1. Using a pair of insulated pliers, hold the coil wire about 0.25 in. (6mm) away from the engine block.
    2.  
    3. Have an assistant turn the ignition switch to the START position. With the engine rotating, spark should occur across the wire gap; if not, further inspection of the coil is necessary.
    4.  


  1. To check the coil's primary circuit, perform the following:
    1. Make sure that the ignition switch is turned OFF .
    2.  
    3. Remove the primary wires from the (+) positive and the (-) negative terminals of the coil.
    4.  
    5. Using an ohmmeter, set it to the 1.0 ohm range, then connect the probes to the primary terminals. The resistance should be 0.84-1.02 ohm's; if not, replace the ignition coil.
    6.  

  2.  
  3. To check the coil's secondary circuit, perform the following:
    1. Make sure that the ignition switch is turned OFF .
    2.  
    3. Remove the coil wire from the center terminal of the coil.
    4.  
    5. Using an ohmmeter, set it to the 15,000 ohm range, then connect the one probe to the center terminal and the other to the (-) negative terminal. The resistance should be 8,200-12,400 ohms. If not, replace the ignition coil.
    6.  

  4.  

REMOVAL & INSTALLATION



  1. Make sure that the ignition switch is in the OFF position.
  2.  
  3. Remove the coil wires from the primary and center terminals.
  4.  
  5. Loosen the coil bracket clamp and slide the coil from the bracket.
  6.  
  7. To install, reverse the removal procedures.
  8.  

 
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