Dodge Durango (HB). Manual — part 293
B2100-IGNITION RUN/START INPUT CIRCUIT PERFORMANCE (CONTINUED)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on.
•
Set Condition:
The Front Control Module will set this DTC if the CAN bus message and the hardwired ignition switch circuit
do not match the position of the ignition switch.
Possible Causes
JUNCTION BLOCK FUSE #18
(F202) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
(F202) FUSED IGNITION SWITCH OUTPUT CIRCUIT SHORTED TO GROUND
FRONT CONTROL MODULE
Diagnostic Test
1.
CHECK FOR ACTIVE DTC
With the scan tool, read the active DTC’s.
Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 90 seconds.
With the scan tool, read the active DTC’s.
Does the scan tool display this DTC as active?
Yes
>> Go To 2
No
>> If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness con-
nectors. Look for broken, bent, pushed out, or corroded terminals.
2.
INSPECT JUNCTION BLOCK FUSE #18
Turn the ignition off.
Remove and inspect Junction Block Fuse #18.
Is the fuse open?
Yes
>> Replace fuse and retest. If fuse continues to fail inspect
the wiring between the Junction Block and the Front Con-
trol Module for a short to ground.
Perform BODY VERIFICATION TEST – VER 1.
No
>> Go To 3
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IGNITION SYSTEM - ELECTRICAL DIAGNOSTICS
8I - 3
B2100-IGNITION RUN/START INPUT CIRCUIT PERFORMANCE (CONTINUED)
3.
(F941) IGNITION SWITCH OUTPUT CIRCUIT OPEN
Turn the ignition on.
Measure the voltage of the (F941) Ignition Switch Output circuit at the
fuse input terminal.
Is the voltage above 10.0 volts?
Yes
>> Go To 4
No
>> Repair the (F941) Ignition Switch Output circuit for an
open. Refer to the wiring diagrams located in 8W.
Perform BODY VERIFICATION TEST – VER 1.
4.
(F202) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
Turn the ignition off.
Install Fuse #18 in the Junction Block.
Remove the FCM from the Power Distribution Module.
Turn the ignition on.
Measure the voltage of the (F202) Fused Ignition Switch output circuit.
Is the voltage above 10.0 volts?
Yes
>> Inspect the wiring and connectors for damage or shorted
circuits. If ok, replace and program the Front Control Mod-
ule in accordance with the service information.
Perform BODY VERIFICATION TEST – VER 1.
No
>> Repair the (F202) Fused Ignition Switch Output circuit for
an open.
Perform BODY VERIFICATION TEST – VER 1.
8I - 4
IGNITION SYSTEM - ELECTRICAL DIAGNOSTICS
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IGNITION SYSTEM - SERVICE INFORMATION
TABLE OF CONTENTS
page
page
IGNITION SYSTEM - SERVICE INFORMATION
. . . . . . . . . . . . . . . . . . . . . . . . . . 5
SPECIFICATIONS - TORQUE - IGNITION
ENGINE FIRING ORDER - 3.7L V-6
ENGINE FIRING ORDER – 4.7L V-8
FIRING ORDER / CABLE ROUTING – 5.7L
V-8 ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
. . . . . . . . . . . . . . . . . . . . . . . . 9
IGNITION COIL RESISTANCE - 3.7L V-6
IGNITION COIL RESISTANCE - 4.7L V-8
IGNITION COIL RESISTANCE - 5.7L V-8
. . . . . . . . . . . . . . . . . . . . . . 9
RELAY-AUTO SHUT DOWN
OPERATION - ASD SENSE - PCM INPUT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
. . . . . . . . . . . . . . . . . . . . . . . . . 10
SENSOR-CAMSHAFT POSITION
. . . . . . . . . . . . . . . . . . . . . . . . . 10
. . . . . . . . . . . . . . . . . . . . . . . . . . . 11
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
. . . . . . . . . . . . . . . . . . . . . . . . . 14
COIL-IGNITION
. . . . . . . . . . . . . . . . . . . . . . . . . 15
. . . . . . . . . . . . . . . . . . . . . . . . . . . 17
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
. . . . . . . . . . . . . . . . . . . . . . . . . 20
SENSOR-KNOCK
. . . . . . . . . . . . . . . . . . . . . . . . . 21
. . . . . . . . . . . . . . . . . . . . . . . . . . . 21
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
. . . . . . . . . . . . . . . . . . . . . . . . . 23
SPARK PLUG
. . . . . . . . . . . . . . . . . . . . . . . . . 24
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
. . . . . . . . . . . . . . . . . . . . . . . . . 25
CABLE-SPARK PLUG
. . . . . . . . . . . . . . . . . . . . . . . . . 26
. . . . . . . . . . . . . . . . . . . . . . . . . . . 26
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
. . . . . . . . . . . . . . . . . . . . . . . . . 27
SWITCH-IGNITION
. . . . . . . . . . . . . . . . . . . . . . . . . 28
. . . . . . . . . . . . . . . . . . . . . . . . . . . 28
. . . . . . . . . . . . . . . . . . . . 28
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
. . . . . . . . . . . . . . . . . . . . . . . . . 31
SWITCH-KEY-IN IGNITION
. . . . . . . . . . . . . . . . . . . . . . . . . 33
CYLINDER . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
IGNITION SYSTEM - SERVICE INFORMATION
DESCRIPTION
The ignition system is controlled by the Powertrain Control Module (PCM) on all engines.
3.7L V-6 ENGINE
The 3.7L V-6 engine uses a separate ignition coil for each cylinder. The one-piece coil bolts directly to the cylinder
head. Rubber boots seal the secondary terminal ends of the coils to the top of all 6 spark plugs. A separate elec-
trical connector is used for each coil.
Because of coil design, spark plug cables (secondary cables) are not used. A distributor is not used with the 3.7L engine.
Two knock sensors (one for each cylinder bank) are used to help control spark knock.
The Auto Shutdown (ASD) relay provides battery voltage to each ignition coil.
The ignition system consists of:
•
6 Spark Plugs
•
6 Separate Ignition Coils
•
2 Knock Sensors
•
Powertrain Control Module (PCM)
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IGNITION SYSTEM - SERVICE INFORMATION
8I - 5
•
Also to be considered part of the ignition system are certain inputs from the Crankshaft Position, Camshaft
Position, Throttle Position, 2 knock and MAP Sensors
4.7L V-8 ENGINE
The 4.7L V-8 engine uses a separate ignition coil for each cylinder. The one-piece coil bolts directly to the cylinder
head. Rubber boots seal the secondary terminal ends of the coils to the top of all 8 spark plugs. A separate elec-
trical connector is used for each coil.
Because of coil design, spark plug cables (secondary cables) are not used. A distributor is not used with the 4.7L engine.
Two knock sensors (one for each cylinder bank) are used to help control spark knock.
The Auto Shutdown (ASD) relay provides battery voltage to each ignition coil.
The ignition system consists of:
•
8 Spark Plugs
•
8 Separate Ignition Coils
•
2 Knock Sensors
•
Powertrain Control Module (PCM)
•
Also to be considered part of the ignition system are certain inputs from the Crankshaft Position, Camshaft
Position, Throttle Position, 2 knock and MAP Sensors
5.7L V-8 ENGINE
For additional information, also refer to Ignition
Coil Description and Operation.
The 5.7L V-8 engine is equipped with 16 spark plugs.
Two plugs are used for each cylinder. The 5.7L is also
equipped with 8 separate and independent ignition
coils. The one-piece coil bolts directly to the cylinder
head cover and attaches the coils secondary output
terminal directly to a spark plug using a rubber boot
seal. Each coil is also equipped with a second output
terminal. This second terminal connects a conven-
tional spark plug cable directly to a spark plug on the
opposite cylinder bank. A separate primary electrical
connector is used for each coil.
Eight conventional spark plug cables are used with the
5.7L. These cables connect a coil on one cylinder
bank, directly to a spark plug on the opposite cylinder
bank. The cables are placed and routed in a special
plastic loom to keep them separated. This loom is
clipped to the intake manifold. To prevent a miss-
match of cables, a corresponding spark plug / coil
number is displayed on each plug cable: 1/6, 2/3, 4/7
and 5/8. These numbers (2) and (3) can also be found
on the top of the intake manifold (1) to the right of the throttle body.
Two knock sensors (one for each cylinder bank) are used to help control spark knock.
The 5.7L engine will not use a conventional distributor.
The ignition system consists of:
•
16 Spark Plugs (2 per cylinder)
•
8 Separate, Dual-Secondary Output, Ignition Coils
•
2 Knock Sensors
•
8 Secondary Ignition Cables
•
Powertrain Control Module (PCM)
•
Also to be considered part of the ignition system are certain inputs from the Crankshaft Position, Camshaft
Position, Throttle Position, 2 knock and MAP Sensors
8I - 6
IGNITION SYSTEM - SERVICE INFORMATION
HB
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