Suzuki Samurai/Sidekick/Tracker 1986-1998 Repair Guide

Ignition Coils

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TESTING



See Figures 1 and 2

Disconnecting the battery cable on some vehicles may interfere with the functions of the on board computer systems and may require the computer to undergo a relearning process, once the negative battery cable is disconnected.

To properly perform this test, you will need a 12 volt vehicle battery and a Digital Volt-Ohmmeter (DVOM). Perform the following test for each ignition coil suspected of malfunctioning.

  1. Remove the ignition coil.
  2.  
  3. Switch the DVOM to the ohm (resistance) setting, then measure the resistance between the two terminals inside the side connector on the coil. The resistance should be between 0.61-0.73 ohms at 68°º °F (20°C). If the resistance is not within the specified value, replace it with a new one.
  4.  
  5. Switch the DVOM to the amp setting, then connect the 12 volt battery and DVOM to the ignition coil as shown in the accompanying illustration to measure the current. The ammeter should register between 0.3-1.4 milliamps. If the current is not within the specified range, replace the ignition coil with a new one.
  6.  



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Fig. Fig. 1: To test the ignition coil(s), first measure the resistance between the two side connector terminals ...



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Fig. Fig. 2: ... then measure the current as shown with a 12 volt battery attached to the coil and the DVOM

  1. Detach the battery and DVOM from the ignition coil, then reattach them so that the negative DVOM lead is attached to side connector and the negative battery lead is connected to the spark plug end of the ignition coil. No current should flow through the ignition coil in this configuration; if there is current flow, replace the ignition coil with a new one.
  2.  
  3. If the ignition coil tested satisfactorily, install it in the engine. Otherwise, install a new ignition coil.
  4.  

REMOVAL & INSTALLATION



See Figures 3 and 4

Disconnecting the battery cable on some vehicles may interfere with the functions of the on board computer systems and may require the computer to undergo a relearning process, once the negative battery cable is disconnected.

  1. Disconnect the negative battery cable, and, if the vehicle has been run recently, allow the engine to thoroughly cool.
  2.  
  3. Remove the ignition coil cover, then unfasten the ignition coil wiring harness connector.
  4.  
  5. Remove the ignition coil mounting bolt, then pull the coil up and out of the cylinder head cover.
  6.  



Click image to see an enlarged view

Fig. Fig. 3: To remove the ignition coils, first remove the ignition coil cover ...



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Fig. Fig. 4: ... then remove the hold-down bolt and lift the coils up and out of the cylinder head cover

To install:
  1. Apply a small amount of silicone dielectric compound to the inside of the end of the ignition coil.
  2.  
  3. Install the ignition coil and mounting bolt. Tighten the mounting bolt snugly.
  4.  
  5. Install the ignition coil cover.
  6.  
  7. Connect the negative battery cable.
  8.  

 
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