Circuit/System Testing
- Verify the integrity of the entire air induction system including all turbocharger components by inspecting for the following conditions:
- Any damaged components, including the turbocharger, the charge air cooler, and the turbo charger wastegate actuator solenoid valve
- Damage to the intake air pressure and temperature sensor
- Loose or improper installation
- An air flow restriction
- Any vacuum leak
- Any pinholes or breaks in the vacuum hoses attached to the turbocharger wastegate solenoid valve
- Any restrictions in the vacuum hoses attached to the turbocharger wastegate solenoid valve
- Improper routing or connecting of the vacuum hoses on the turbocharger bypass solenoid valve, the bypass valve, and the turbocharger wastegate actuator solenoid valve
- Any type of air leak between the turbocharger and the throttle body, including the CAC assembly.
- Exhaust leaks
- If a condition is found, repair as necessary.
- Ignition OFF, remove B65 intake air pressure and temperature sensor but leave the electrical connector connected.
- Connect the J 24460-01 Cooling System Pressure Tester to the intake air pressure and temperature, boost pressure, sensor port with a suitable adapter. Engine running, observe the scan tool Boost Pressure Sensor parameter. Apply 6 psi to the B65 intake air pressure and temperature, boost pressure, sensor. Verify the scan tool Boost Pressure Sensor parameter responds to the applied pressure.
- If the scan tool Boost Pressure Sensor parameter does not increase with the applied pressure, replace the B65 intake air pressure and temperature sensor.
- Inspect the turbocharger oil supply lines for a restriction.
- If restricted, repair or replace as necessary.
- If all other components test normal, test or replace the turbocharger.