Chrysler New Yorker. Manual — part 60
GENERATOR—3.2/3.5L
REMOVAL
(1) Disconnect negative battery cable.
(2) Loosen lower mounting bolt do not remove.
(3) Loosen pivot bolt, but do not remove.
(4) Loosen belt adjustment bolt.
(5) Remove the generator drive belt. Refer to
Group 7, Cooling System.
(6) Remove bracket.
(7) Remove lower mounting bolt.
(8) Remove pivot bolt.
(9) Remove generator.
(10) Disconnect the generator field circuit plug.
(11) Remove the B+ terminal nut and wire.
INSTALLATION
(1) For
installation,
reverse
above
procedures.
Tighten all fasteners to the proper torque. Refer to
the Torque Specifications chart at the rear Group 8C.
SPECIFICATIONS
TORQUE
DESCRIPTION
TORQUE
Battery Terminal Nut . . . . . . . . 10 N·m (90 in. lbs.)
Battery Hold Down Clamp Bolt . . . . . . . . . . 14 N·m
(125 in. lbs.)
Generator B+ Terminal . . . . . . . . 9 N·m (75 in. lbs.)
Generator Mounting Bolt 8 mm . 41 N·m (30 ft. lbs.)
Generator Mounting Bolt 10 mm . . . . . . . . . 54 N·m
(40 ft. lbs.)
Generator Pivot Bolt 10 mm . . . . 54 N·m (40 ft. lbs.)
8C - 10
CHARGING SYSTEM
300M
REMOVAL AND INSTALLATION (Continued)
IGNITION SYSTEM
CONTENTS
page
page
GENERAL INFORMATION
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . 1
DESCRIPTION AND OPERATION
AUTOMATIC SHUTDOWN (ASD) AND FUEL
PUMP RELAYS . . . . . . . . . . . . . . . . . . . . . . . . 4
CAMSHAFT POSITION SENSOR . . . . . . . . . . . . . 5
COIL ON PLUG . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CRANKSHAFT POSITION SENSOR . . . . . . . . . . . 4
ENGINE COOLANT TEMPERATURE SENSOR . . . 6
IGNITION INTERLOCK . . . . . . . . . . . . . . . . . . . . 7
IGNITION SYSTEM . . . . . . . . . . . . . . . . . . . . . . . 1
INTAKE AIR TEMPERATURE SENSOR . . . . . . . . 6
KNOCK SENSORS . . . . . . . . . . . . . . . . . . . . . . . . 7
LOCK KEY CYLINDER . . . . . . . . . . . . . . . . . . . . . 7
MANIFOLD ABSOLUTE PRESSURE (MAP)
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
POWERTRAIN CONTROL MODULE (PCM) . . . . 2
SPARK PLUGS . . . . . . . . . . . . . . . . . . . . . . . . . . 2
THROTTLE POSITION SENSOR (TPS) . . . . . . . . 7
DIAGNOSIS AND TESTING
CRANKSHAFT POSITION SENSOR . . . . . . . . . 8
ENGINE COOLANT TEMPERATURE SENSOR . . . 8
IGNITION TIMING PROCEDURE . . . . . . . . . . . . . 8
INTAKE AIR TEMPERATURE SENSOR . . . . . . . . 8
MANIFOLD ABSOLUTE PRESSURE (MAP)
SENSOR TEST . . . . . . . . . . . . . . . . . . . . . . . . . 8
SPARK PLUG CONDITION . . . . . . . . . . . . . . . . . 8
THROTTLE POSITION SENSOR . . . . . . . . . . . . . 8
REMOVAL AND INSTALLATION
AUTOMATIC SHUTDOWN RELAY . . . . . . . . . . . 12
CAMSHAFT POSITION SENSOR—2.7L . . . . . . 12
CAMSHAFT POSITION SENSOR—3.2/3.5L . . . 12
CRANKSHAFT POSITION SENSOR . . . . . . . . . . 13
ENGINE COOLANT TEMPERATURE SENSOR . . 13
IGNITION COIL . . . . . . . . . . . . . . . . . . . . . . . . . 11
IGNITION INTERLOCK . . . . . . . . . . . . . . . . . . . 17
IGNITION SWITCH . . . . . . . . . . . . . . . . . . . . . . 15
INTAKE AIR TEMPERATURE SENSOR . . . . . . . 14
KNOCK SENSOR . . . . . . . . . . . . . . . . . . . . . . . . 13
LOCK CYLINDER HOUSING . . . . . . . . . . . . . . . 17
LOCK KEY CYLINDER . . . . . . . . . . . . . . . . . . . . 15
MANIFOLD ABSOLUTE PRESSURE (MAP)
SENSOR—2.7L . . . . . . . . . . . . . . . . . . . . . . . 14
MANIFOLD ABSOLUTE PRESSURE (MAP)
SENSOR—3.2/3.5L . . . . . . . . . . . . . . . . . . . . 14
POWERTRAIN CONTROL MODULE (PCM) . . . 10
SPARK PLUG . . . . . . . . . . . . . . . . . . . . . . . . . . 11
THROTTLE POSITION SENSOR . . . . . . . . . . . . 15
SPECIFICATIONS
SPARK PLUGS . . . . . . . . . . . . . . . . . . . . . . . . . 18
TORQUE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
VECI LABEL . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
GENERAL INFORMATION
INTRODUCTION
This group describes the ignition systems for the
2.7, 3.2, and 3.5L 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.
DESCRIPTION AND OPERATION
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
an ignition coil for every cylinder, it is mounted
directly over the each spark plug.
300M
IGNITION SYSTEM
8D - 1
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 crankshaft position from these sensors. The
PCM calculates injector sequence and ignition timing
from crankshaft position. For a description of both
sensors, refer to Camshaft Position Sensor and
Crankshaft Position Sensor in this section.
POWERTRAIN CONTROL MODULE (PCM)
The PCM regulates the ignition system (Fig. 1).
The PCM supplies battery voltage to the ignition coil
through the Automatic Shutdown (ASD) Relay. The
PCM also controls the ground circuit for the ignition
coil. By switching the ground path for the coil on and
off, the PCM adjusts ignition timing to meet chang-
ing engine operating conditions.
During the crank-start period the PCM advances
ignition timing a set amount. During engine opera-
tion the following inputs determine the amount of
spark advance provided by the PCM. During the run
mode the coils are turned on and off by inputs from
the following:
• Intake air temperature
• Coolant temperature
• Engine RPM
• Available manifold vacuum
• Knock sensor
The PCM also regulates the fuel injection system.
Refer to the Fuel Injection sections of Group 14.
SPARK PLUGS
The 2.7, 3.2, and 3.5L engines use platinum resis-
tor spark plugs. They have resistance values of 6,000
to 20,000 ohms when checked with at least a 1000
volt tester. For spark plug identification and specifi-
cations, Refer to the Specifications section at the end
of this group.
Do not use an ohm meter to check the resis-
tance of the spark plugs. This will give an inac-
curate reading.
Remove the spark plugs and examine them for
burned electrodes and fouled, cracked or broken por-
celain insulators. Keep plugs arranged in the order
in which they were removed from the engine. An iso-
lated plug displaying an abnormal condition indicates
that a problem exists in the corresponding cylinder.
Replace spark plugs at the intervals recommended in
Group 0.
The spark plugs are double platinum and have a
recommended service life of 100,000 miles for normal
driving conditions per schedule A in this manual. The
spark plugs have a recommended service life of
75,000 miles for serve driving conditions per schedule
B in this manual. A thin platinum pad is welded to
both electrode ends as show in (Fig. 3). Extreme care
must be used to prevent spark plug cross threading,
mis-gaping and ceramic insulator damage during
plug removal and installation.
CAUTION: Never attempt to file the electrodes or
use a wire brush for cleaning platinum plugs. This
would damage the platinum pads which would
shorten spark plug life.
Adjust the gap between the electrodes (Fig. 2) to
the dimensions specified in the chart at the end of
this section.
Apply a very small amount of anti-seize compound
to the threads when reinstalling the vehicle’s original
spark plugs that have been determined good. Do not
apply anti-seize compound to new spark plugs.
NOTE: Anti-seize compound is electrically conduc-
tive and can cause engine misfires if not applied
correctly. It is extremely important that the anti-
seize compound doesn’t make contact with the
spark plug electrodes or ceramic insulator.
Never force a gap gauge between the platinum
electrodes or adjust the gap on platinum spark plugs
without reading the Spark Plug Gap Measurement
procedures in this section.
Always tighten spark plugs to the specified torque.
Over tightening can cause distortion resulting in a
change in the spark plug gap. Overtightening can
also damage the cylinder head.
Fig. 1 Powertrain Control Module
8D - 2
IGNITION SYSTEM
300M
DESCRIPTION AND OPERATION (Continued)
SPARK PLUG GAP MEASUREMENT
CAUTION: The Platinum pads can be damaged dur-
ing the measurement of checking the gap if extreme
care is not used.
• USE ONLY A TAPER GAP GAUGE (Fig. 2).
• Never force the gap gauge through the platinum
pads. Only apply enough force until resistance is felt.
• Never use a wire brush or spark plug cleaner
machine to clean platinum spark plugs.
• Use an OSHA approved air nozzle when drying
gas fouled spark plugs.
If gap adjustment is required of platinum plug,
bend only the ground electrode. DO NOT TOUCH
the platinum pads. Use only a proper gapping tool
and check with a taper gap gauge.
CAUTION: Cleaning of the platinum plug may dam-
age the platinum tip.
COIL ON PLUG
The engines are equipped with a coil on plug igni-
tion system. Each cylinder has a dedicated coil that
sits atop each plug. No secondary wires are required
and connection from the coil to plug is made with a
boot that is attached to the coil. The Powertrain Con-
trol Module (PCM) determines which coil to charge
and fire at the correct time.
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
Fig. 4 2.7L Coil
Fig. 5 3.2/3.5L Coil
Fig. 2 Setting Spark Plug Electrode Gap
Fig. 3 Platinum Pads
300M
IGNITION SYSTEM
8D - 3
DESCRIPTION AND OPERATION (Continued)
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