Ignition Coil - Dodge Dakota Sport 2001 Service Manual

AN
DISTRIBUTOR CAP (Continued)
Fig. 19 Cap Inspection—External—Typical
1 - BROKEN TOWER
2 - DISTRIBUTOR CAP
3 - CARBON PATH
4 - CRACK
Fig. 20 Cap Inspection—Internal—Typical
1 - CHARRED OR ERODED TERMINALS
2 - WORN OR DAMAGED ROTOR BUTTON
3 - CARBON PATH
DISTRIBUTOR ROTOR
DIAGNOSIS AND TESTING - DISTRIBUTOR
ROTOR
Visually inspect the rotor (Fig. 21) for cracks, evi-
dence of corrosion or the effects of arcing on the
metal tip. Also check for evidence of mechanical
interference with the cap. Some charring is normal
on the end of the metal tip. The silicone-dielectric-
varnish-compound applied to the rotor tip for radio
interference noise suppression, will appear charred.
IGNITION CONTROL
This is normal. Do not remove the charred com-
pound. Test the spring for insufficient tension.
Replace a rotor that displays any of these adverse
conditions.
Fig. 21 Rotor Inspection—Typical
1 - INSUFFICIENT SPRING TENSION
2 - CRACKS
3 - EVIDENCE OF PHYSICAL CONTACT WITH CAP
4 - ROTOR TIP CORRODED

IGNITION COIL

DESCRIPTION - EXCEPT 4.7L
A single ignition coil is used. The coil is not oil
filled. The coil windings are embedded in an epoxy
compound. This provides heat and vibration resis-
tance that allows the coil to be mounted on the
engine.
DESCRIPTION - 4.7L
The 4.7L V–8 engine uses 8 dedicated, and individ-
ually fired coil (Fig. 22) for each spark plug. Each
coil is mounted directly to the top of each spark plug
(Fig. 23).
OPERATION - EXCEPT 4.7L
The Powertrain Control Module (PCM) opens and
closes the ignition coil ground circuit for ignition coil
operation.
Battery voltage is supplied to the ignition coil pos-
itive terminal from the ASD relay. If the PCM does
not see a signal from the crankshaft and camshaft
sensors (indicating the ignition key is ON but the
engine is not running), it will shut down the ASD cir-
cuit.
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