System Inspection

1. Visually check turbocharger system components, checking for:

^ Damaged connections or insulation.
^ Damaged vane air flow meter.
^ Dirty air filter element.
^ Air duct damage, looseness.
^ Vacuum hose damage, pinching, kinking, bad connections.
^ Turbocharger oil leakage.
^ Unusual engine noises.
^ Wastegate, actuator, or linkage damage or binding.

2. Check wiring and connectors at solenoids, knock control unit, ECA, and other electronic components for obvious problems such as looseness, corrosion, or other damage.
3. If a component is suspected as the obvious cause for the malfunction, correct the defect before proceeding.
4. If all checks are OK, proceed to Diagnostic Charts-Pinpoint Tests.