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Home >> Cadillac >> 2012 >> Escalade ESV RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1902 (Engine Mechanical - Hybrid (LZ1) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Camshaft Position Actuator and Solenoid Valve Diagnosis and Testing

Camshaft Position Actuator and Solenoid Valve Diagnosis and Testing

WARNING: This page is about a different car, the 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
  1. Review the system operation in order to familiarize yourself with the system functions. As required, disable the auto-stop function prior to repair. Refer to Hybrid Modes of Operation Description .
  2. Measure the engine oil level. Fill, as required.
  3. Using the scan tool, inspect for diagnostic codes within the engine control module (ECM). Refer to Diagnostic System Check - Vehicle . Repair, as required.
  4. Inspect the CMP actuator solenoid valve for proper operation. Refer to 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 System Check - Vehicle .
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