Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

ACTIVE DTC
NOTE:
Diagnose any Deactivation or Oil Pressure DTCs before continuing with this test.
1. Turn the ignition on.
2. With a scan tool, read DTCs.
  Is the DTC active at this time?
  
  Yes
  - Go To 2.
  No
  - Refer to INTERMITTENT CONDITION and perform the INTERMITTENT CONDITION diagnostic procedure.
MDS SOLENOID 1
NOTE:
The DTC must not be active for the actuator test to operate properly, clear all DTC before continuing.
1. Turn the ignition off.
2. Remove the Intake Manifold in accordance with the Service Information. Refer to MANIFOLD, Intake , Removal , 5.7L .
3. Turn the ignition on.
4. With the scan tool actuate the MDS Solenoid 1.
  Can you feel and hear the Solenoid Actuating?
  
  Yes
  - Go To 3.
  No
  - 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. Refer to SOLENOID, Multiple Displacement , Removal , 5.7L .
  - Refer to POWERTRAIN VERIFICATION TEST and perform the POWERTRAIN VERIFICATION TEST.
MDS SOLENOID 7
NOTE:
The DTC must not be active for the actuator test to operate properly, clear all DTC before continuing.
1. With the scan tool actuate the MDS Solenoid 7.
  Can you feel and hear the Solenoid Actuating?
  
  Yes
  - Go To 4.
  No
  - 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. Refer to SOLENOID, Multiple Displacement , Removal , 5.7L .
  - Refer to POWERTRAIN VERIFICATION TEST and perform the POWERTRAIN VERIFICATION TEST.
OIL PASSAGES RESTRICTED
1. Turn the ignition off.
2. Remove both Solenoids on Bank 1 of the engine block. Refer to SOLENOID, Multiple Displacement , Removal , 5.7L .
3. Remove the Bank 1 Cylinder Head in accordance with the service information. Refer to Cylinder Head , Removal , 5.7L .
4. Remove the Lifters from the left 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.
  - Refer to POWERTRAIN VERIFICATION TEST and perform the POWERTRAIN VERIFICATION TEST.
  No
  - Replace both sets of lifters if no other possible causes remain.
  - Refer to POWERTRAIN VERIFICATION TEST and perform the POWERTRAIN VERIFICATION TEST.