4. Test for infinite resistance between each valve lifter oil manifold circuit terminal listed and the valve lifter oil manifold housing.
锟斤拷If less than infinite resistance, replace the valve lifter oil manifold assembly.
Dynamic Test
1. Ignition OFF, disconnect the harness connector at the valve lifter oil manifold assembly.
2. Connect the cable that is labeled power from the displacement on demand DOD tester to the connector.
3. Connect the power leads from the DOD tester to B+ and ground.
4. Command each valve lifter oil manifold solenoid ON and OFF using the DOD tester. You should be able to hear each solenoid turn ON and
OFF.
锟斤拷If the function does not perform as specified, replace the valve lifter oil manifold assembly.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Valve Lifter Oil Manifold Replacement (See: Engine, Cooling and Exhaust/Engine/Camshaft, Lifters and Push Rods/Lifter / Lash
Adjuster/Service and Repair/Valve Lifter Oil Manifold Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming
P3401
DTC P3401, P3425, P3441, or P3449
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P3401
- Cylinder 1 Deactivation Solenoid Control Circuit
DTC P3425
- Cylinder 4 Deactivation Solenoid Control Circuit
DTC P3441
- Cylinder 6 Deactivation Solenoid Control Circuit
DTC P3449
- Cylinder 7 Deactivation Solenoid Control Circuit
Diagnostic Fault Information
Typical Scan Tool Data
