Voyager L4-2.4L VIN B (1997)
Ignition Coil: Description and Operation
CIRCUIT OPERATION
The ignition coils are molded together. Each coil fires two spark plugs at one time. One cylinder is beginning its compression stroke, the other its
exhaust stroke. Refer to Ignition System, for system operation.
When the Automatic Shut Down (ASD) relay contacts CLOSE, they connect circuit #4 to circuit A142. Circuit A142 supplies battery voltage to
the ignition coils. The Powertrain Control Module (PCM) controls the ground circuit of each coil.
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Circuit K19 is the ground circuit for the ignition coil that fires spark plugs one and four. Circuit K19 connects to cavity 11 of the PCM.
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Circuit K17 is the ground circuit for the ignition coil that fires spark plugs two and three. Circuit K17 connects to cavity 3 of the PCM.
Helpful Information
Circuit A142 splices to supply voltage to the fuel injectors, generator field, upstream heated oxygen sensor and downstream heated oxygen sensor.
Circuit A142 also connects to cavity 6 of the PCM.
