Removal; Installation; Ignition Coil Capacitor Description - Chrysler Concorde 2004 Service Manual

8I - 6 IGNITION CONTROL
IGNITION COIL (Continued)
The coil's low primary resistance (0.4 - 0.6 ohm)
allows the PCM to fully charge the coil for each fir-
ing. There is a coil capacitor added to each bank of
cylinders for the 2.7L and the left bank of the 3.5L
for radio noise suppression (Fig. 9).
Fig. 9 COIL CAPACITOR
1 - IGNITION COIL CAPACITOR

REMOVAL

(1) Prior to removing the ignition coils, spray com-
pressed air around the coil area and spark plug.
(2) Remove electrical connector from ignition coil.
On 3.5L engines, it is necessary to loosen the
screws by alternating back and forth. Do not lose the
spacers under the coil when loosening the screws.
(3) Remove 2 fasteners from ignition coil assembly.
(4) Remove ignition coil assembly.

INSTALLATION

(1) Install ignition coil assembly for spark plug.
(2) Install coil screws and tighten: 2.7L engine to
6.2 N·m (55 in. lbs.), 3.5L engines to 6.7 N·m (60 in.
lbs.).
(3) Connect the electrical connector.
IGNITION COIL CAPACITOR
DESCRIPTION
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. For limp home capa-
bility, the engine can run on crankshaft sensor or
camshaft sensor. Refer to Auto Shutdown (ASD)
Relay—PCM Output, in this section for relay opera-
tion.
The coil's low primary resistance (0.4 - 0.6 ohm)
allows the PCM to fully charge the coil for each fir-
ing. There is a coil capacitor for radio noise suppres-
sion (Fig. 10).
Fig. 10 COIL CAPACITOR
1 - IGNITION COIL CAPACITOR
REMOVAL
(1) Remove the negative battery cable.
(2) Disconnect the electrical connector (Fig. 11).
(3) Remove nut and capacitor.
Fig. 11 COIL CAPACITOR
1 - IGNITION COIL CAPACITOR
LH