Chrysler 1998 Voyager Service Manual page 299

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GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . 1
2.4L ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.0L ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
GENERAL INFORMATION
AUTOMATIC SHUTDOWN (ASD) RELAY . . . . . . . 4
CAMSHAFT POSITION SENSOR . . . . . . . . . . . . . 5
CRANKSHAFT POSITION SENSOR . . . . . . . . . . . 5
ENGINE COOLANT TEMPERATURE (ECT)
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
IGNITION COIL . . . . . . . . . . . . . . . . . . . . . . . . . . 4
IGNITION SYSTEM . . . . . . . . . . . . . . . . . . . . . . . 2
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . 1
KNOCK SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . 7
LOCK KEY CYLINDER . . . . . . . . . . . . . . . . . . . . . 7
MANIFOLD ABSOLUTE PRESSURE (MAP)
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
POWERTRAIN CONTROL MODULE . . . . . . . . . . . 1
SPARK PLUG CABLE . . . . . . . . . . . . . . . . . . . . . . 3
SPARK PLUGS-2.4/3.0L . . . . . . . . . . . . . . . . . . . 2
SPARK PLUGS-3.3/3.8L . . . . . . . . . . . . . . . . . . . 2
THROTTLE POSITION SENSOR (TPS) . . . . . . . . 7
GENERAL INFORMATION
INTRODUCTION
This group describes the ignition systems for the
2.4, 3.0, and 3.3/3.8L engines.
On Board Diagnostics is described in Group 25 -
Emission Control Systems.
Group 0 - Lubrication and Maintenance, contains
general maintenance information for ignition related
items. The Owner's Manual also contains mainte-
nance information.
IGNITION SYSTEM
CONTENTS
page
3.3/3.8L ENGINE . . . . . . . . . . . . . . . . . . . . . . . . 28
IGNITION SWITCH AND LOCK CYLINDER . . . . . 35
GENERAL INFORMATION
INDEX
page
DIAGNOSIS AND TESTING
CAMSHAFT POSITION SENSOR AND
CHECK COIL TEST-2.4L . . . . . . . . . . . . . . . . . . 9
CHECK COIL TEST-3.3/3.8L . . . . . . . . . . . . . . . . 9
ENGINE COOLANT TEMPERATURE SENSOR . . 11
FAILURE TO START TEST . . . . . . . . . . . . . . . . . 10
IGNITION TIMING PROCEDURE . . . . . . . . . . . . 11
INTAKE AIR TEMPERATURE SENSOR . . . . . . . . 11
MANIFOLD ABSOLUTE PRESSURE (MAP)
SPARK PLUG CONDITION . . . . . . . . . . . . . . . . . 11
TESTING FOR SPARK AT COIL-2.4/3.3/3.8L
TESTING FOR SPARK AT COIL-3.0L . . . . . . . . . 8
THROTTLE POSITION SENSOR . . . . . . . . . . . . 13
SERVICE PROCEDURES
IGNITION TIMING PROCEDURE . . . . . . . . . . . . 15
POWERTRAIN CONTROL MODULE . . . . . . . . . . 13
SPARK PLUG GAP ADJUSTMENT . . . . . . . . . . . 13
POWERTRAIN CONTROL MODULE
The ignition system is regulated by the Powertrain
Control Module (PCM) (Fig. 1). The PCM supplies
battery voltage to the ignition coil through the Auto
Shutdown (ASD) Relay. The PCM also controls
ground circuit for the ignition coil. By switching the
ground path for the coil on and off, the PCM adjusts
ignition timing to meet changing engine operating
conditions.
During the crank-start period the PCM advances
ignition timing a set amount. During engine opera-
tion, the amount of spark advance provided by the
PCM is determined by the following input factors:
IGNITION SYSTEM
CRANKSHAFT POSITION SENSOR . . . . . . . . . 11
SENSOR TEST . . . . . . . . . . . . . . . . . . . . . . . . 11
ENGINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8D - 1
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