Intrepid V6-3.2L VIN J (1998)
Ignition Coil: Description and Operation
Fig 5 Coil
COIL ON PLUG
The engines are equipped with a coil on plug ignition system. Each cylinder has a dedicated coil that sits atop each plug. No secondary wires are
required and connection from the coil to plug is made with a boot that is attached to the coil. The Powertrain Control Module (PCM) determines
which coil to charge and fire at the correct time.
The Auto Shutdown (ASD) relay provides battery voltage to the ignition coil. The PCM provides a ground contact (circuit) for energizing the coil.
When the PCM breaks the contact, the energy in the coil primary transfers to the secondary causing the spark. The PCM will de-energize the ASD
relay if it does not receive the crankshaft position sensor and camshaft position sensor inputs. Refer to Auto Shutdown (ASD) or Main Relay-PCM
Output, for relay operation.
Fig 7 Coil Capacitor
The coil's low primary resistance (0.4 - 0.6 ohm) allows the PCM to fully charge the coil for each firing. There are coil capacitor added to each
bank of cylinders for radio noise suppression.
