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Home › Chrysler › 2007 › 300 Base › Repair and Diagnosis › Engine Performance › System › DTCS P2181 To P3426 › P3400-MDS Rationality Bank 1 › Diagnostic Test

Diagnostic Test

  1. 1) ACTIVE DTC 
    NOTE: Diagnose any Deactivation or Oil Pressure DTCs before continuing with this test.

    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) MDS SOLENOID 1 
    NOTE: The DTC must not be active for the actuator test to operate properly, clear all DTC before continuing.

    Turn the ignition off.

    Remove the Intake Manifold per Service Information.

    Turn the ignition on.

    With the scan tool actuate the MDS Solenoid 1.

    Can you feel and hear the Solenoid Actuating? 

    Yes 

    1. Go to step  3).

    No 

    1. Remove the Solenoid and check for any debris that may be blocking the oil passages 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 1.
    2. Perform *PCM VERIFICATION TEST .
  3. 3) MDS SOLENOID 7 
    NOTE: The DTC must not be active for the actuator test to operate properly, clear all DTC before continuing.

    With the scan tool actuate the MDS Solenoid 7.

    Can you feel and hear the Solenoid Actuating? 

    Yes 

    1. Go to step  4).

    No 

    1. Remove the Solenoid and check for any debris that may be blocking the oil passages to the Solenoid. If the passages are restricted, clean the passages and replace the MDS Solenoid 7. If the passages are not clogged with debris, replace the MDS Solenoid 7.
    2. Perform *PCM VERIFICATION TEST .
  4. 4) OIL PASSAGES RESTRICTED 

    Turn the ignition off.

    Remove both Solenoids on Bank 1 of the engine block.

    Remove the Bank 1 Cylinder Head per Service Information.

    Remove the Lifters from the left engine bank.

    Inspect the oil passages to the Solenoids and from the Solenoids to the lifters.

    Are the passages blocked? 

    Yes 

    1. Clean the oil passages as necessary. If the entire engine is restricted disassembly of the entire engine block may be necessary.
    2. Perform *PCM VERIFICATION TEST .

    No 

    1. Replace both sets of lifters if no other possible causes remain.
    2. Perform *PCM VERIFICATION TEST .
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