Chrysler 1997 Stratus Convertible RHD Service Manual page 250

PLATINUM SURFACE SPARK
8D - 4 IGNITION SYSTEM
DESCRIPTION AND OPERATION (Continued)
Fig. 2 Platinum Pads
Fig. 3 Setting Spark Plug Electrode Gap
The nipples and spark plug covers should be in good
condition. Nipples should fit tightly on the coil and
distributor cap towers and spark plug cover should
fit tight around spark plug insulators. Loose cable
connections can cause ignition malfunctions by per-
mitting water to enter the towers, corroding, and
increasing resistance. To maintain proper sealing
at the terminal connections, the connections
should not be broken unless testing indicates
high resistance, an open circuit or other dam-
age.
Clean high tension cables with a cloth moistened
with a non-flammable solvent and wipe dry. Check
for brittle or cracked insulation.
COMPOUND APPLY ANTI-SEIZE HERE ONLY
ELECTRONIC IGNITION COIL
WARNING: THE DIRECT IGNITION SYSTEM GEN-
ERATES APPROXIMATELY 40,000 VOLTS. PER-
SONAL INJURY COULD RESULT FROM CONTACT
WITH THIS SYSTEM.
The coil pack is mounted on the valve cover (Fig. 4).
High tension leads route to each cylinder from the
coil. The coil fires two spark plugs every power
stroke. One plug is the cylinder under compression,
the other cylinder fires on the exhaust stroke. Coil
TAPER GAUGE
number one fires cylinders 1 and 4. Coil number two
fires cylinders 2 and 3. The PCM determines which
of the coils to charge and fire at the correct time.
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 Shut-
down (ASD) Relay—PCM Output, in this section for
relay operation.
IGNITION COIL—2.5L
are not oil filled. The windings are embedded in a
heat and vibration resistant epoxy compound.
distributor (pin 11). On a 2.5L The PCM controls
ignition timing by turning on and off the tranisistor
in the distributor. By switching the ground path for
the coil on and off, the PCM adjusts ignition timing
to meet changing engine operating conditions.
Auto Shutdown (ASD) relay. When the relay is ener-
gized by the PCM, battery voltage is connected to the
ignition coil positive terminal. The PCM will de-ener-
gize the ASD relay if it does not receive an input
from the distributor pick-up. Refer to Auto Shutdown
(ASD) Relay and Fuel Pump Relay in this section.
The coil pack consists of 2 coils molded together.
The Auto Shutdown (ASD) relay provides battery
Fig. 4 Ignition Coil Pack—2.4L Engine
The 2.5L engine uses an epoxy type coil. The coils
On a 2.5L the ignition transistor is located in the
The PCM operates the ignition coil through the
JX
IGNITION COILS