Circuit/System Testing

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

NOTE:

Circuit/System Verification must be performed before proceeding with Circuit/System Testing.

Ignition/Vehicle - Off
Verify the tool is available: GE-52250 Variable Pressure Leak Detector
- If the tool is not available
  Refer to step 6
- Go to next step: If the tool is available
Perform the following procedure/test: Component/System Leak Test
Verify the procedure/test passes.
- If the procedure/test does not pass
  Repair or replace as necessary
- Go to next step: If the procedure/test passes
Verify the following conditions do not exist: Engine - Mechanical Condition
- Camshaft Lobe(s) - Visible Damage/Worn
- Exhaust Valve or Intake Valve - Stuck Open/Visible Damage
- Exhaust Valve Seat or Intake Valve Seat - Visible Damage
- Piston - Cracked/Visible Damage
- Piston Ring - Seized/Visible Damage/Worn
- Compressor Air Intake Turbocharger or Turbine Shaft Seal - Leaking - Engine Oil
- Compressor Air Intake Turbocharger - Low oil pressure
- Compressor Air Intake Turbocharger - Mechanical Condition/Worn
- If a condition exists
  Repair or replace as necessary
- Go to next step: If no condition exists
Verify the following conditions do not exist:
- B65 Manifold Absolute Pressure and Intake Air Temperature Sensor - Visible Damage
- B75 Mass Airflow Sensor - Contamination of the measuring element / Visible Damage/Water intrusion
- B111 Turbocharger/Supercharger Boost Pressure Sensor
  - Restricted - Moisture/Ice
  - Skewed
- Q38 Throttle Body
  - Coking/Visible Damage
  - Restricted - Moisture/Ice
- Air Cleaner Element - Dirty / Restricted
- Catalytic Converter & Exhaust System - Blocked / Leaking /Restricted/Visible Damage - Refer to Symptoms - Engine Exhaust
- Charge Air Cooler - Restricted /Moisture/Ice
- Intake Air Duct - Collapsed/Restricted / Visible Damage
- Intake Manifold - Restricted / Visible Damage
- Linkage @ M128 Turbocharger Wastegate Actuator - Binding or Sticking/Loose/Visible Damage
- Q40 Turbocharger Bypass Valve Solenoid - Binding or Sticking/Loose/Visible Damage
- Positive Crankcase Ventilation System - Restricted - Moisture/Ice
- If a condition exists
  Repair or replace as necessary
- Go to next step: If no condition exists
  Go to next step: Replace the component: Turbocharger
Verify the conditions listed below do not exist:
- B65 Manifold Absolute Pressure and Intake Air Temperature Sensor - Leaking @ O-Ring - Missing / Visible Damage
- B75 Mass Airflow Sensor - Contamination of the measuring element /Cracked/Loose Clamps / Visible Damage/Water intrusion
- B111 Turbocharger/Supercharger Boost Pressure Sensor
  - Leaking @ O-Ring - Missing / Visible Damage
  - Restricted - Moisture/Ice
  - Skewed
- Linkage @ M128 Turbocharger Wastegate Actuator - Binding or Sticking/Loose/Visible Damage
- Q40 Turbocharger Bypass Valve Solenoid - Binding or Sticking/Loose/Visible Damage
- Q38 Throttle Body
  - Coking/Loose Clamps /Visible Damage
  - Restricted - Moisture/Ice
- Air Cleaner Element - Dirty / Restricted
- Catalytic Converter - Blocked / Restricted/Visible Damage
- Charge Air Cooler
  - Leaking / Incorrect connection
  - Restricted - Moisture/Ice
- Engine - Mechanical Condition - Refer to Symptoms - Engine Mechanical
- Exhaust System - Leaking /Restricted/ Visible Damage - Refer to Symptoms - Engine Exhaust
- Intake Air Ductor Turbocharger Inlet Duct - Cracked/ Leaking/ Loose Clamps / Restricted / Visible Damage
- Intake Manifold - Cracked / Loose Clamps / Restricted / Vacuum leak/Visible Damage
- Positive Crankcase Ventilation System
  - Leaking @ O-Ring - Missing / Visible Damage
  - Restricted - Moisture/Ice
  - Incorrect connection /Leaking / Restricted
- Turbocharger - Mechanical damage/Visible Damage - Refer to Compressor Air Intake Turbocharger Overhaul
- Vacuum leak @ Engine - Oil Level Indicator and Tube /Oil Filler Cap
- If a condition exists
  Repair or replace as necessary
- Go to next step: If no condition exists
Replace the component: Turbocharger