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Diagnostic Test

  1. 1) ACTIVE DTC 
    NOTE: Diagnose any Misfire DTCs before continuing.

    Turn the ignition on.

    With a scan tool, read DTCs.

    Is the DTC active at this time? 

    Yes 

    1. Go to step  2).

    No 

    1. Refer to *CHECKING FOR AN INTERMITTENT DTC .
    2. Perform *PCM VERIFICATION TEST .
  2. 2) CHECKING PCM CONTROL SIDE FOR THE MDS SOLENOID 
    NOTE: The DTC must not be active for the actuator test to operate properly, clear all DTC before continuing.
    Fig 1: Checking MDS Solenoid 1 Ground Circuit & Control Circuit
    GC0039882Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the C100 harness connector.

    Using a 12 volt test light, jumper from the (Z904) Ground Circuit and the (K451) MDS Solenoid No.1 Control Circuit in the C100 harness connector (PCM side).

    Turn the ignition on.

    With the scan tool, actuate the MDS Solenoid No.1.

    Does the 12 volt test light flash on and off? 

    Yes 

    1. Go to step  3).

    No 

    1. Go to step  4).
  3. 3) MDS SOLENOID RESISTANCE 
    Fig 2: Checking MDS Solenoid 1 Ground Circuit & Control Circuit
    GC0039883Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Measure the resistance between the (Z904) Ground Circuit and the (K451) MDS SolenoidNo.1 Control Circuit in the C100 harness connector (MDS side).

    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 

    1. Go to step  12).

    No 

    1. Go to step  8).
  4. 4) (Z904) GROUND CIRCUIT OPEN (PCM SIDE) 
    Fig 3: Checking MDS Solenoid Ground Circuit
    GC0039884Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Using a 12 volt test light connected to the 12 volts, probe the (Z904) Ground circuit in the C100 harness connector (PCM side).

    Does the test light illuminate brightly? 

    Yes 

    1. Go to step  5).

    No 

    1. Repair the open in the (Z904) Ground circuit.
    2. Perform *PCM VERIFICATION TEST .
  5. 5) (K451) MDS SOLENOID NO.1 CONTROL CIRCUIT SHORTED TO BATTERY VOLTAGE (PCM SIDE) 
    Fig 4: Checking MDS Solenoid 1 Control Circuit
    GC0039906Courtesy of CHRYSLER LLC

    Disconnect the PCM harness connector.

    Turn the ignition on.

    Measure the voltage on the (K451) MDS Solenoid No.1 Control circuit in the C100 harness connector.

    Does the voltmeter indicate voltage present? 

    Yes 

    1. Repair the short to battery voltage in the (K451) MDS Solenoid No.1 Control circuit between the PCM harness connector and C100 harness connector.
    2. Perform *PCM VERIFICATION TEST .

    No 

    1. Go to step  10).
  6. 6) (K451) MDS SOLENOID NO.1 CONTROL CIRCUIT SHORTED TO GROUND (PCM SIDE) 
    Fig 5: Checking MDS Solenoid 1 Control Circuit
    GC0039885Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Measure the resistance between ground and the (K451) MDS Solenoid No.1 Control circuit in the C100 harness connector.

    Is the resistance below 100 ohms? 

    Yes 

    1. Repair the short to ground in the (K451) MDS Solenoid No.1 Control circuit between the PCM harness connector and the C100 harness connector.
    2. Perform *PCM VERIFICATION TEST .

    No 

    1. Go to step  7).
  7. 7) (K451) MDS SOLENOID NO.1 CONTROL CIRCUIT OPEN (PCM SIDE) 
    Fig 6: Checking MDS Solenoid 1 Control Circuit
    GC0039886Courtesy 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 Miller Special Tool #8815 to perform diagnosis.

    Measure the resistance of the (K451) MDS Solenoid No.1 Control circuit from the C100 harness connector to the appropriate terminal of special tool #8815.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Replace and program the Powertrain Control Module in accordance with the service information.
    2. Perform *PCM VERIFICATION TEST .

    No 

    1. Repair the open in the (K451) MDS Solenoid No.1 Control circuit between the C100 harness connector and the PCM harness connector.
    2. Perform *PCM VERIFICATION TEST .
  8. 8) (Z904) GROUND CIRCUIT OPEN (MDS SIDE) 
    Fig 7: Checking MDS Solenoid 1 Ground Circuit
    GC0039907Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Gain access to the MDS Solenoid.

    Disconnect the MDS harness connector.

    Measure the resistance of the (Z904) Ground Circuit between the C100 harness connector and the MDS harness connector.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go to step  9).

    No 

    1. Repair the open in the (Z904) Ground circuit.
    2. Perform *PCM VERIFICATION TEST .
  9. 9) (K451) MDS SOLENOID NO.1 CONTROL CIRCUIT SHORTED TO BATTERY VOLTAGE (MDS SIDE) 
    Fig 8: Checking MDS Solenoid 1 Control Circuit
    GC0039908Courtesy of CHRYSLER LLC

    Turn the ignition on.

    Measure the voltage on the (K451) MDS Solenoid No.1 Control circuit in the MDS Solenoid No.1 connector.

    Does the voltmeter indicate voltage present? 

    Yes 

    1. Repair the short to battery voltage in the (K451) MDS Solenoid No.1 Control circuit between the C100 harness connector and the MDS connector.
    2. Perform *PCM VERIFICATION TEST .

    No 

    1. Go to step  10).
  10. 10) (K451) MDS SOLENOID NO.1 CONTROL CIRCUIT SHORTED TO GROUND (MDS SIDE) 
    Fig 9: Checking MDS Solenoid 1 Control Circuit
    GC0039909Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Measure the resistance between ground and the (K451) MDS Solenoid No.1 Control circuit in the MDS Solenoid No.1 harness connector.

    Is the resistance below 100 ohms? 

    Yes 

    1. Repair the short to ground in the (K451) MDS Solenoid No.1 Control circuit between the C100 harness connector and the MDS harness connector.
    2. Perform *PCM VERIFICATION TEST .

    No 

    1. Go to step  11).
  11. 11) (K451) MDS SOLENOID NO.1 CONTROL CIRCUIT OPEN (MDS SIDE) 
    Fig 10: Checking MDS Solenoid 1 Control Circuit
    GC0039910Courtesy of CHRYSLER LLC

    Measure the resistance of the (K451) MDS Solenoid No.1 Control circuit from the MDS Solenoid No.1 harness connector to C100 harness connector.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Replace the MDS Solenoid in accordance with the Service Information.
    2. Perform *PCM VERIFICATION TEST .

    No 

    1. Repair the open in the (K451) MDS Solenoid No.1 Control circuit between the C100 harness connector and the MDS harness connector.
    2. Perform *PCM VERIFICATION TEST .
  12. 12) CHECKING HARNESS CONNECTOR C101 AND GROUND CONNECTION G102 
    Fig 11: Checking Harness Connector
    GC0039911Courtesy of CHRYSLER LLC

    Inspect the C101 harness connector.

    Ensure the Ground terminal and Control terminal are fastened securely into the connector and there are no signs of corrosion or damage.

    Check wiring to terminal connection. Look for an internal broken wire under the insulation.

    Inspect the G102 Ground for a tight, clean connection.

    Were any problems found? 

    Yes 

    1. Repair as necessary.
    2. Perform *PCM VERIFICATION TEST .

    No 

    1. Refer to *CHECKING FOR AN INTERMITTENT DTC .
    2. Perform *PCM VERIFICATION TEST .
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