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Home >> Cadillac >> 2008 >> Escalade RWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 4.8L, 5.3L, 6.0L Or 6.2L (1 Of 5) >> Diagnostic Information and Procedures >> Camshaft Position Actuator and Solenoid Valve Diagnosis and Testing

Camshaft Position Actuator and Solenoid Valve Diagnosis and Testing

    IMPORTANT: Camshaft Position (CMP) Actuator and Solenoid Valve Diagnosis and Testing is applicable for RPO LY6/L76/L92.
  1. Measure the engine oil level. Fill, as required.
  2. Using the scan tool, inspect for diagnostic codes within the engine control module (ECM). Refer to Diagnostic System Check - Vehicle (without HP2) or Diagnostic System Check - Vehicle (with HP2) . Repair, as required.
  3. Verify proper engine oil pressure and operation of the active fuel management oil pressure relief valve. Refer to Oil Pressure Diagnosis and Testing .
  4. Inspect the CMP actuator solenoid valve for proper operation. Refer to Camshaft Position Actuator Solenoid Valve Inspection (On-Vehicle) or Camshaft Position Actuator Solenoid Valve Inspection (Off-Vehicle) .
    • If valve inspection confirms proper movement of the spool, replace the CMP actuator and CMP valve.
    • If valve inspection confirms improper movement of the spool, replace only the CMP valve.
  5. Verify proper operation of the CMP actuator control system. Refer to Diagnostic Starting Point - Engine Controls .
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