Charge Air Cooler (CAC) System
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The CAC system cools the intake air which has been heated by the turbocharger. The removal of heat from the pressurized air going into the CAC increases the air density which improves combustion efficiency, engine horsepower, and torque. The system consists of a CAC radiator in the grille and tubing to interconnect these components. The CAC is positioned after the turbocharger directly in the flow of the intake air. As the heated air flows through the CAC, it is cooled by the airflow through the grille. The PCM maintains a desirable intake air temperature by monitoring the TCBP/CACT (located at the throttle body) and the MAP/IAT2 (located at the intake manifold) sensors.
TURBOCHARGER SYSTEM REFERENCE CHART
| Turbocharger System | Component |
|---|---|
| 1 | Wastegate Right Bank (Bank 1) |
| 2 | Manifold Absolute Pressure/Intake Air Temperature 2 (MAP/IAT2) Sensor |
| 3 | Throttle Body |
| 4 | Turbocharger Boost Pressure/Charger Air Cooler Temperature (TCBP/CACT) Sensor |
| 5 | Wastegate Left Bank (Bank 2) |
| 6 | Turbocharger Left Bank (Bank 2) |
| 7 | Turbocharger Bypass Valve Left Bank (Bank 2) |
| 8 | Charge Air Cooler (CAC) |
| 9 | Turbocharger Bypass Valve Right Bank (Bank 1) |
| 10 | Turbocharger Right Bank (Bank 1) |