Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1157
5.
MDS SOLENOID 6
Turn the ignition off.
Remove the Intake Manifold per Service Information.
Turn the ignition on.
With the scan tool actuate the MDS Solenoid 6.
Can you feel and hear the Solenoid Actuating?
Yes
>> Go To 6
No
>> Remove the Solenoid (1) and check for any debris that may
be blocking the oil passages (3) to the Solenoid. If the pas-
sages are clogged, clean the passages and replace the
MDS Solenoid 6. If the passages are not clogged with
debris, replace the MDS Solenoid 6.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
6.
OIL PASSAGES RESTRICTED
Turn the ignition off.
Remove both Solenoids on Bank 2 of the engine block.
Remove the Bank 2 Cylinder Head per Service Information.
Remove the Lifters from the right engine bank.
Inspect the oil passages to the Solenoids and from the Solenoids to the lifters.
Are the passages blocked?
Yes
>> Clean the oil passages as necessary. If the entire engine is restricted disassembly of the entire engine
block may be necessary.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Replace both sets of lifters if no other possible causes remain.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
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ENGINE ELECTRICAL DIAGNOSTICS
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P1417–CYLINDER 7 REACTIVATION CONTROL PERFORMANCE
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ENGINE ELECTRICAL DIAGNOSTICS
9 - 653
Theory of Operation
When all criteria has been met, power is supplied to each MDS Solenoid when the engine is making a transition
from 8 cylinder mode to 4 cylinder mode. By actuating the solenoid, oil pressure is raised to the pair of lifters that
coincide with each particular solenoid. The oil pressure pushes in the locking pins that allows the lifter to collapse,
decoupling the valves and camshaft.
•
When Monitored:
Transition from 4 to 8 cylinder mode.
•
Set Condition:
The MDS fails to disengage for cylinder 7.
Possible Causes
(K454) MDS SOLENOID NO.7 CONTROL SHORT TO VOLTAGE
OIL PASSAGES RESTRICTED
LIFTER
MDS SOLENOID NO.7
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.
ACTIVE DTC
Ignition on, engine not running.
With a scan tool, read DTCs.
Is the DTC active 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.
(K454) MDS SOLENOID NO.7 CONTROL CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the C101 harness connector.
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.
Turn the ignition on.
Measure the voltage on (K454) MDS Solenoid No.7 Control circuit in the appropriate terminal of special tool #8815.
Is voltage present?
Yes
>> Repair the short to voltage in the (K454) MDS Solenoid No.7 Control circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 3
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ENGINE ELECTRICAL DIAGNOSTICS
LX
3.
MDS SOLENOID RESISTANCE
Turn the ignition off.
Measure the resistance between the (Z904) Ground Circuit and the (K454) MDS Solenoid No.7 Control Circuit in the
appropriate terminals of special tool #8815.
NOTE: It is important to follow the below temp/resistance values to ensure an accurate reading.
MDS SOLENOID RESISTANCE
TEMPERATURE VALUE ± 20° F
RESISTANCE (OHMS) ± .25 ohms
0° F
8.8 ohms
32° F
9.5 ohms
68° F
10.3 ohms
100° F
11 ohms
150° F
12.2 ohms
200° F
13.4 ohms
250° F
14.4 ohms
300° F
15.6 ohms
Is the resistance within an acceptable range?
Yes
>> Go To 4
No
>> Visually and Physically inspect the wiring harness between the C101 connector and the MDS Solenoid
connector. Repair as necessary. If OK, replace the MDS Solenoid in accordance with the Service Infor-
mation.
4.
PCM CONTROL
Turn the ignition off.
Reconnect the PCM harness connector.
Disconnect the C100 harness connector.
Ignition on, engine not running.
Using a 12-volt test light connected to the (Z904) Ground circuit, probe the (K454) MDS Solenoid No.7 Control
circuit in the C100 harness connector.
With a scan tool, actuate the MDS Solenoid.
Does the 12-volt test light flash on and off?
Yes
>> Go To 5
No
>> Replace and program the Powertrain Control Module in accordance with the Service Information.Per-
form the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
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ENGINE ELECTRICAL DIAGNOSTICS
9 - 655
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