Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1072
16.
(K15) COIL CONTROL NO.4 CIRCUIT
Turn the ignition off.
Disconnect the PCM harness connectors.
CAUTION: Do not probe the PCM harness connectors. Probing the
PCM harness connectors will damage the PCM terminals resulting
in poor terminal to pin connection. Install Miller Special Tool #8815
to perform diagnosis.
Check the (K15) Coil Control No.4 circuit for an open, short to ground,
and short to voltage.
Was a problem found with the (K15) Coil Control No.4 circuit?
Yes
>> Repair the (K15) Coil Control No.4 circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 17
17.
PCM
NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal
push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and
Ground circuits.
Were there any problems found?
Yes
>> Repair as necessary.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Replace and program the Powertrain Control Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
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ENGINE ELECTRICAL DIAGNOSTICS
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P0305-CYLINDER 5 MISFIRE
For a complete wiring diagram Refer to Section 8W.
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ENGINE ELECTRICAL DIAGNOSTICS
9 - 313
•
When Monitored:
Any time the engine is running, and the adaptive numerator has been successfully updated.
•
Set Condition:
The threshold to set the fault is application specific; it is tied to the level of misfire that will cause emissions to
increase to 1.5 times the standard or in some cases 1%. It is always a two trip fault above the calibrated RPM.
It takes 1 soft fail to set a malfunction and two trips to set the MIL. Three good trips to turn off the MIL.
Possible Causes
(K343) ASD RELAY OUTPUT 2 CIRCUIT
(K38) INJECTOR CONTROL NO.5 CIRCUIT
(K16) COIL CONTROL NO.5 CIRCUIT
IGNITION WIRE
SPARK PLUG
IGNITION COIL
FUEL PUMP INLET STRAINER PLUGGED
RESTRICTED FUEL SUPPLY LINE
FUEL PUMP MODULE
FUEL PRESSURE LEAK DOWN
FUEL INJECTOR
ENGINE MECHANICAL PROBLEM
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.
CYLINDER MIS-FIRE CONDITION ACTIVE
Engine running.
Observe the WHICH CYLINDER IS MISFIRING screen for at least one minute with a scan tool.
Is there a misfire present at this time?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
2.
VISUAL INSPECTION
NOTE: Anything that affects the speed of the crankshaft can cause a misfire DTC.
NOTE: When a Misfire is detected for a particular cylinder, the PCM will shut down that cylinders Injector
Control circuit.
Visually inspect the engine for any of the following conditions.
- Worn serpentine belt
- Binding Engine-Driven accessories: A/C Compressor, P/S Pump, Water pump.
- Misalignment Water pump, P/S Pump and A/C Compressor pulleys
- Corroded PCM power and ground circuits.
- Improper CKP, CMP, MAP, and TP Sensor mounting
- Poor connector/terminal to component connection. i.e., CKP sensor, Fuel Injector, Ign coil, etc.
- Vacuum leaks
- Restricted Air Induction system or Exhaust system.
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ENGINE ELECTRICAL DIAGNOSTICS
LX
- Internal engine component failures.
Were any of the above conditions present?
Yes
>> Repair as necessary.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 3
3.
(K343) ASD RELAY OUTPUT 2 CIRCUIT
NOTE: On the 2.7 and 3.5L engines, cylinders 1, 3 and 5, it is nec-
essary to remove the upper intake to access the ignition coils and
the Fuel Injector harness connectors.
Turn the ignition off.
Disconnect the No.5 Ignition Coil harness connector.
Disconnect the No.5 Fuel Injector harness connector.
Ignition on, engine not running.
With the scan tool, actuate the ASD Relay.
Using a 12-volt test light connected to ground, probe the (K343) ASD
Relay Output 2 circuit in the Ignition Coil harness connector and Fuel
Injector harness connector while the relay is actuating.
Does the test light illuminate brightly?
Yes
>> Go To 4
No
>> Repair the excessive resistance or short to ground in the
(K343) ASD Relay Output 2 circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)
4.
IGNITION SYSTEM OPERATION
NOTE: On the 2.7 and 3.5L engines, cylinders 1, 3 and 5, it is necessary to remove the upper intake to
access the ignition coils. Once the ignition coil has been removed from the cylinder head, the intake must
be reinstall to be able to crank the engine. Move the ignition coil harness connector through the slots in the
upper intake and then connect the coil to the harness connector. Secure the upper intake to the lower
intake in accordance with the service information.
Turn the ignition off.
Connect the Ignition Coil No.5 harness connector.
Remove the Ignition Coil.
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ENGINE ELECTRICAL DIAGNOSTICS
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