Diagnostic Test

ACTIVE DTC
NOTE: Diagnose any Misfire DTCs before continuing.
1. Start the engine and allow it to reach normal operating temperature.
  WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in possible serious or fatal injury.
  
  NOTE: It may be necessary to test drive the vehicle in order for this DTC to set.
2. With a scan tool, select View DTCs.
  Is the DTC Active at this time?
  
  Yes
  - Go to step 2
  No
  - Perform the INTERMITTENT CONDITION Diagnostic Procedure. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
CHECKING PCM CONTROL SIDE FOR THE MDS SOLENOID (C112)

Fig 1: Checking MDS Solenoid Control Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the C112 harness connector.
3. Using a 12-volt test light, jumper from the (Z42) Ground Circuit and the (K451) MDS Solenoid No. 1 Control Circuit in the C112 harness connector (PCM side).
4. Turn the ignition on.
5. With the scan tool, actuate the MDS Solenoid No. 1.
  NOTE: The test light should be illuminated and bright proportional to the maximum duty cycle allowed by the scan tool. For example, if the scan tool allows 100% actuation, the brightness should be as bright as a direct connection to the battery. If the scan tool allows a maximum 25% actuation, the brightness should be 25% as bright as a direct connection to the battery.
  
  Does the 12-volt test light illuminate accordingly?
  
  Yes
  - Go to step 3
  No
  - Go to step 4

MDS SOLENOID RESISTANCE

Fig 2: Checking MDS Solenoid Control Circuit

Courtesy of CHRYSLER LLC

Turn the ignition off.
Measure the resistance between the (Z42) Ground Circuit and the (K451) MDS Solenoid No. 1 Control Circuit in the C112 harness connector (MDS side).
NOTE: It is important to follow the below temp/resistance values to ensure an accurate reading.

Is the resistance within an acceptable range?

Yes
- Go to step 7
No
- Visually and Physically inspect the wiring harness between the C112 connector and the MDS Solenoid connector. Repair as necessary. If OK, replace the MDS Solenoid in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .

MDS SOLENOID RESISTANCE
TEMPERATURE VALUE ± -7° C (20° F)	RESISTANCE (OHMS) ±.25 ohms
-18° C (0° F)	8.8 ohms
0° C (32° F)	9.5 ohms
20° C (68° F)	10.3 ohms
38° C (100° F)	11 ohms
66° C (150° F)	12.2 ohms
93° C (200° F)	13.4 ohms
121° C (250° F)	14.4 ohms
149° C (300° F)	15.6 ohms

(Z42) GROUND CIRCUIT OPEN (PCM SIDE)

Fig 3: Checking Ground Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Using a 12-volt test light connected to 12-volts, probe the (Z42) Ground circuit in the C112 harness connector (PCM side).
  Does the test light illuminate brightly?
  
  Yes
  - Go to step 5
  No
  - Repair the open in the (Z42) Ground circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K451) MDS SOLENOID NO. 1 CONTROL CIRCUIT SHORTED TO GROUND (PCM SIDE)

Fig 4: Checking MDS Solenoid Control Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the C3 PCM harness connector.
3. Measure the resistance between ground and the (K451) MDS Solenoid No. 1 Control circuit in the C112 harness connector.
  Is the resistance below 100 ohms?
  
  Yes
  - Repair the short to ground in the (K451) MDS Solenoid No. 1 Control circuit between the PCM harness connector and the C112 harness connector.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 6
(K451) MDS SOLENOID NO. 1 CONTROL CIRCUIT OPEN (PCM SIDE)

Fig 5: Checking MDS Solenoid Control Circuit
Courtesy of CHRYSLER LLC

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 PCM Pinout Box 8815 to perform diagnosis.
1. Measure the resistance of the (K451) MDS Solenoid No. 1 Control circuit from the C112 harness connector to the appropriate terminal of special tool #8815.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Replace and program the Powertrain Control Module in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Repair the open in the (K451) MDS Solenoid No. 1 Control circuit between the C112 harness connector and the PCM harness connector.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
MDS SOLENOID 1

Fig 6: View Of MDS Solenoids
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Remove the Intake Manifold per Service Information.
3. Reconnect the PCM harness connector.
4. Turn the ignition on.
5. With the scan tool actuate the MDS Solenoid 1.
  Can you feel and hear the Solenoid Actuating?
  
  Yes
  - Go to step 8
  No
  - Remove the Solenoid (1) and check for any debris that may be blocking the oil passages (3) to the Solenoid. If the passages are clogged, clean the passages and replace the MDS Solenoid 1. If the passages are not clogged with debris, replace the MDS Solenoid 6.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
OIL PASSAGES RESTRICTED
1. Turn the ignition off.
2. Remove both Solenoids on Bank 1of the engine block.
3. Remove the Bank 1 Cylinder Head per Service Information.
4. Remove the Lifters from the right engine bank.
5. 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. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Replace both sets of lifters if no other possible causes remain.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .