Dodge Dakota (R1). Manual — part 313
(6) Check for continuity between the horn switch
feed wire and the horn switch ground wire on the
driver side airbag module. There should be no conti-
nuity. If OK, go to Step 7. If not OK, replace the
faulty horn switch.
(7) Depress the center of the driver side airbag
module trim cover and check for continuity between
the horn switch feed wire and the horn switch
ground wire on the driver side airbag module. There
should now be continuity. If not OK, replace the
faulty horn switch.
8H - 6
HORN
AN
HORN SWITCH (Continued)
IGNITION CONTROL
TABLE OF CONTENTS
page
page
IGNITION CONTROL
AUTO SHUT DOWN RELAY
ASD AND FUEL PUMP RELAYS . . . . . . . . . . . . . 4
CAMSHAFT POSITION SENSOR
DISTRIBUTOR
DISTRIBUTOR CAP
DIAGNOSIS AND TESTING . . . . . . . . . . . . . . . . . 12
DISTRIBUTOR CAP . . . . . . . . . . . . . . . . . . . . . 12
DISTRIBUTOR ROTOR
DIAGNOSIS AND TESTING . . . . . . . . . . . . . . . . . 13
DISTRIBUTOR ROTOR. . . . . . . . . . . . . . . . . . . 13
IGNITION COIL
SPARK PLUG
SPARK PLUG CONDITIONS . . . . . . . . . . . . . . . 16
SPARK PLUG CABLE
SPARK PLUG CABLES. . . . . . . . . . . . . . . . . . . 20
IGNITION CONTROL
DESCRIPTION
Two different ignition systems are used. One type
of system is for the 2.5L 4–cylinder, the 3.9L V-6
engine and the 5.9L V-8 engine. The other is for the
4.7L V-8 engine.
The ignition systems used on 2.5L 4–cylinder, 3.9L
V-6 and 5.9L V-8 engines are basically identical using
a conventional distributor and remotely mounted coil.
The 4.7L V-8 engine does not use a distributor and
has 8 separate coils.
OPERATION
The ignition system is controlled by the Powertrain
Control Module (PCM) on all engines.
The ignition system consists of:
• Spark Plugs
• Ignition Coil(s)
• Secondary
Ignition
Cables
(2.5L/3.9L/5.9L
engines)
• Distributor (contains rotor and camshaft position
sensor) (2.5L/3.9L/5.9L engines)
• Powertrain Control Module (PCM)
• Crankshaft Position and Camshaft Position Sen-
sors
• The MAP, TPS, IAC and ECT also have an effect
on the control of the ignition system.
AN
IGNITION CONTROL
8I - 1
SPECIFICATIONS
IGNITION TIMING
Ignition timing is not adjustable on any engine.
ENGINE FIRING ORDER—2.5L 4-CYLINDER
ENGINE
ENGINE FIRING ORDER—3.9L V-6 ENGINE
ENGINE FIRING ORDER—4.7L V-8 ENGINE
ENGINE FIRING ORDER—5.2L/5.9L V-8
ENGINES
8I - 2
IGNITION CONTROL
AN
SPECIFICATIONS - TORQUE - IGNITION
DESCRIPTION
N·m
Ft. Lbs.
In. Lbs.
Camshaft Position Sensor Bolt—4.7L V-8 Engine
12
106
Crankshaft Position Sensor—2.5L Engine
12
9
Crankshaft Position Sensor—3.9L/5.2L/5.9L Engines
8
70
Crankshaft Position Sensor Bolt—4.7L V-8 Engine
28
21
Distributor Hold Down Bolt
23
17
Ignition Coil Mounting (except 4.7L) (if tapped bolts are used)
5
50
Ignition Coil Mounting (except 4.7L) (if nuts/bolts are used)
11
100
Ignition Coil Mounting Nut—4.7L V-8 Engine
8
70
Spark Plugs—Except 4.7L
35-41
26-30
Spark Plugs—4.7L V-8 Engine
27
20
SPECIFICATIONS - IGNITION COIL RESISTANCE - 4.7L V-8 ENGINE
PRIMARY RESISTANCE 21-27°C (70-80°F)
SECONDARY RESISTANCE 21-27°C (70-80°F)
0.6 - 0.9 Ohms
6,000 - 9,000 Ohms
SPECIFICATIONS - IGNITION COIL RESISTANCE—EXCEPT 4.7L
COIL MANUFACTURER
PRIMARY RESISTANCE @
21-27°C (70-80°F)
SECONDARY RESISTANCE @ 21-27°C
(70-80°F)
Diamond
0.97 - 1.18 Ohms
11,300 - 15,300 Ohms
Toyodenso
0.95 - 1.20 Ohms
11,300 - 13,300 Ohms
SPECIFICATIONS - SPARK PLUG CABLE
RESISTANCE
MINIMUM
MAXIMUM
250 Ohms Per Inch
1000 Ohms Per Inch
3000 Ohms Per Foot
12,000 Ohms Per Foot
SPECIFICATIONS - SPARK PLUGS
ENGINE
PLUG TYPE
ELECTRODE GAP
2.5L 4-CYL.
RC12ECC
0.89 mm (.035 in.)
3.9L V-6
RC12LC4
1.01 mm (.040 in.)
4.7L V-8
RC12MCC4
1.01 mm (.040 in.)
5.2L V-8
RC12LC4
1.01 mm (.040 in.)
5.9L V-8
RC12LC4
1.01 mm (.040 in.)
AN
IGNITION CONTROL
8I - 3
SPECIFICATIONS
(Continued)
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