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Home >> Jeep >> 1994 >> Grand Cherokee Laredo, 5.2 Y, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing - 5.2L >> Ignition Checks >> Ignition Coil Resistance Test
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Ignition Coil Resistance Test

  1. Inspect coil for arcing. Measure coil primary and secondary resistance. See IGNITION COIL RESISTANCE  table. Replace coil if resistance is not within specification.
    NOTE: Each coil tower is labeled with corresponding cylinder number.
  2. Remove spark plug wires from coil one at a time. Measure secondary resistance of ignition coil between grouped cylinders and coil towers. Replace coil if resistance is not within specification. See IGNITION COIL RESISTANCE  table. If ignition system components are in good condition, ignition system is okay. If vehicle still fails to start, proceed to NO-START TEST.
IGNITION COIL RESISTANCE

Application Primary Secondary
Diamond 0.97-1.18 11,300-15,300
Toyodenso 0.95-1.20 11,300-13,300
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