CTS RWD V8-6.2L SC (2009)
1 - By-pass Valve Actuator
2 - Boost Signal
3 - Boost Control Solenoid
4 - Boost Vacuum Source
5 - Supercharger
6 - Intake Plenum
7 - By-pass Valve (normally closed)
8 - Throttle Body
9 - Air Cleaner
10 - MAF Sensor
11 - Inlet Vacuum Signal
Operation
Supercharger boost pressure is regulated to prevent engine and drive train damage. When the engine is operating under high boost conditions, the engine
control module (ECM) limits boost pressure to 83 kPa (12 psi). The ECM disables boost under the following conditions:
*
Reverse gear is selected.
*
Drivetrain abuse is detected.
*
Electronic throttle control (ETC) fault is detected.
*
Engine coolant temperature (ECT) is greater than 125°C (257°F).
*
An intercooler pump failure is detected.
*
Intake air temperature (IAT) sensor 2 is equal to or greater than 120.5°C (248°F), boost pressure is limited to 145 kPa (7 psi). The ECM
commands the boost control solenoid to default to 62 percent DC.
