Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Jeep >> 2008 >> Commander Base, 4.7 N, AWD >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P2175 To P3497 >> P3497-MDS Rationality Bank 2 >> Diagnostic Test

Diagnostic Test

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

    Ignition on, engine not running.

    With a scan tool, select View DTCs.

    NOTE: Diagnose any Deactivation or Oil Pressure DTCs before continuing with this test.

    Is the DTC Active at this time? 

    Yes 

    1. Go To  2.

    No 

    1. Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
  2. MDS SOLENOID 4 

    Turn the ignition off.

    Remove the Intake Manifold per Service Information.

    Turn the ignition on.

    NOTE: The DTC needs to be cleared before actuating the Solenoid, if the DTC is not cleared, the Solenoid may not be allowed to actuate.

    With the scan tool actuate the MDS Solenoid 4.

    Can you feel and hear the Solenoid Actuating? 

    Yes 

    1. Go To  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 4. If the passages are not clogged with debris, replace the MDS Solenoid 4.
    2. Perform POWERTRAIN VERIFICATION TEST .
  3. MDS SOLENOID 6 

    With the scan tool actuate the MDS Solenoid 6.

    NOTE: The DTC needs to be cleared before actuating the Solenoid, if the DTC is not cleared, the Solenoid may not be allowed to actuate.

    Can you feel and hear the Solenoid Actuating? 

    Yes 

    1. Go To  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 6. If the passages are unable to be cleaned out, replacing the engine block may be necessary. If the passages are not clogged with debris, replace the MDS Solenoid 6.
    2. Perform POWERTRAIN VERIFICATION TEST .
  4. 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 each pair of lifters for Cylinders 4 and 6.

    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 POWERTRAIN VERIFICATION TEST .

    No 

    1. Replace both sets of lifters if no other possible causes remain.
    2. Perform POWERTRAIN VERIFICATION TEST .
scientia non olet · About Mike's Workshop Manuals