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Home >> Cadillac >> 2013 >> Escalade Base, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Engine Controls/Fuel - Hybrid (LZ1) - DTC P0351 To DTC P3449 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P219A or P219B >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF, open the hood to disable the Auto-Stop function. Refer to Hybrid Modes of Operation Description .
  2. Ignition ON, verify the scan tool hood position parameter displays Open.
  3. Read and record the Freeze Frame/Failure Records data taking note of the speed and load at which the DTC set.
  4. Diagnose any other DTCs that are set. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
  5. Engine idling, observe the scan tool MAP Sensor Pressure parameter. The reading should be between 19-42 kPa.
  6. Inspect the air induction system for modified, damaged, leaking, or restricted components.
  7. Inspect the crankcase ventilation system for improper operation. Refer to Crankcase Ventilation System Inspection/Diagnosis .
  8. Inspect the vacuum hoses for splits, kinks, and improper connections.
  9. Inspect for vacuum leaks at the intake manifold, the throttle body, and the injector O-rings.
  10. Test for a restricted, damaged, leaking, or modified exhaust system from the catalytic converter forward. Refer to Symptoms - Engine Exhaust .
  11. Test the fuel injectors for improper operation. Refer to Fuel Injector Diagnosis (CH47976) , Fuel Injector Diagnosis (J39021 or Scan Tool) .
  12. Test for fuel contamination. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
  13. Test for excessive fuel in the crankcase due to leaking injectors.
  14. Test the ignition system for improper operation. Refer to Electronic Ignition System Diagnosis .
  15. Test the engine for any mechanical conditions such as sticking valves, lifters, etc., which could alter the flow into the combustion chamber. Refer to Symptoms - Engine Mechanical .
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