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Home >> Audi >> 1993 >> 90 CS, 2.8 K, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Ignition Checks >> 2.3L >> Primary Resistance
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Primary Resistance

  1. On version 1, disconnect ignition coil power stage connector and ignition coil wire. See Figure . On version 2, disconnect ignition coil power stage connector and remove screw from top of assembly. See Figure .
  2. On both versions, connect Multimeter (US 1119) between ignition coil positive (+) and negative () terminals. See Figure and Figure . Reading should be .5-1.5 ohms. If reading is not as specified, replace ignition coil.
  3. If primary resistance is within specification but there is no ignition, replace ignition coil and power stage as an assembly.
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