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Home >> Plymouth >> 1994 >> Voyager Base, 2.5 K, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing - 3.8L >> Ignition Checks >> Ignition Coil Resistance Test
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Ignition Coil Resistance Test

  1. Disconnect electrical connector from coil pack. Measure resistance on primary side of each coil. Measure resistance between ASD relay output (B+) terminal of ignition coil connector and corresponding cylinders. See Figure and Figure . Replace coil if resistance is not within specification. See IGNITION COIL RESISTANCE table. If resistance is within specification, go to next step.
    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 - Ohms @ 70-80°F (21-27°C)

Application Primary Secondary
Diamond (1) 0.45-0.65 7000-15,800
Toyodenso (2) 0.45-0.65 7000-15,800
(1) With brass towers.
(2) With aluminum towers.
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