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LH
IGNITION CONTROL
OPERATION - IGNITION SYSTEM
SPECIFICATIONS
TORQUE
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DESCRIPTION - IGNITION SYSTEM
NOTE: All engines use a fixed ignition timing sys-
tem. Basic ignition timing is not adjustable. All
spark advance is determined by the Powertrain
Control Module (PCM).
The distributorless ignition system used on these
engines is referred to as the Direct Ignition System
(DIS). The system's three main components are the
coils, crankshaft position sensor, and camshaft posi-
tion sensor. The coil on plug ignition system utilizes
SPECIFICATIONS
TORQUE
DESCRIPTION
2.7L Camshaft Position
Sensor Screw
3.5L Camshaft Position
Sensor Screw
Engine Coolant Sensor
2.7L Crankshaft Position
Sensor Screw
IGNITION CONTROL
TABLE OF CONTENTS
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N·m
12
12
28
12
IGNITION CONTROL 8I - 1
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REMOVAL
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an ignition coil for every cylinder, it is mounted
directly over the each spark plug.
OPERATION - IGNITION SYSTEM
The crankshaft position sensor and camshaft posi-
tion sensor are hall effect devices. The camshaft posi-
tion sensor and crankshaft position sensor generate
pulses that are inputs to the PCM. The PCM deter-
mines engine position from these sensors. The PCM
calculates injector sequence and ignition timing from
crankshaft & camshaft position. For a description of
both sensors, refer to Camshaft Position Sensor and
Crankshaft Position Sensor.
Ft. Lbs.
-
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20
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page
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In. Lbs.
105
105
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105
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