Volvo 240/740/760/780/940/960 1990-1998

Ignition Coil

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TESTING



Primary Winding Test

See Figures 1, 2 and 3

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the air cleaner assembly.
  4.  
  5. Remove the coil primary leads.
  6.  
  7. Connect an ohmmeter between the primary windings connectors on the outside of the coil.
  8.  
  9. Resistance should be 0.5-1.5 ohms.
  10.  



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Fig. Fig. 1: Remove the coil primary leads



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Fig. Fig. 2: Attach the ohmmeter probes to the studs after removing the primary leads



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Fig. Fig. 3: Testing the primary windings of the ignition coil

Secondary Winding Test

See Figure 4

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the air cleaner assembly.
  4.  
  5. Remove the coil wire from the coil.
  6.  
  7. Connect an ohmmeter between one of the primary winding connectors on the outside of the coil and the coil wire tower on the coil.
  8.  
  9. Resistance should be 8-9 kilohms.
  10.  



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Fig. Fig. 4: Testing the secondary windings of the ignition coil

REMOVAL & INSTALLATION



See Figures 5, 6, 7 and 8

The ignition coil and power stage are an assembly.

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the air cleaner assembly.
  4.  
  5. Carefully remove the coil wire from the coil tower.
  6.  
  7. Remove the mounting bolt(s) from the retaining bracket and remove the ignition coil and power stage.
  8.  
  9. Unplug the power stage connector.
  10.  

To install:
  1. Install the coil and power stage and tighten the retaining bolts.
  2.  
  3. Plug the power stage connector in.
  4.  
  5. Install the coil wire on the coil tower.
  6.  
  7. Install the air cleaner assembly.
  8.  
  9. Connect the negative battery cable.
  10.  



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Fig. Fig. 5: Remove the coil wire from the coil



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Fig. Fig. 6: Unfasten the mounting bolts ...



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Fig. Fig. 7: ... then remove the assembly from the strut tower



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Fig. Fig. 8: Unplug the power stage connector and remove the assembly from the vehicle

 
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