Supercharger: Description and Operation

Description







SYSTEM DESCRIPTION
This system controls supercharged air according to the engine operating conditions.

This control operation is accomplished through the ECM and the SCB valve control solenoid valve.

When the solenoid valve is ON, the SCB valve shuts. Then intake air is lead to supercharger, and supercharged air is sent to the cylinder.

When the solenoid valve is OFF, the SCB valve opens. Then intake air is sent to the cylinder directly.

When the ECM detects any of the following conditions, current does not flow through the solenoid valve.
- Engine stopped
- Engine starting
- High-load, high-speed engine operation
- Excessively low engine coolant temperature
- Mass air flow sensor malfunction
- Engine coolant temperature sensor malfunction
- Throttle position sensor malfunction

COMPONENT DESCRIPTION




SCB Valve Control Solenoid Valve
The SCB valve control solenoid valve responds to signals from the ECM. When the ECM sends an ON (ground) signal, the solenoid valve is bypassed to apply intake manifold vacuum to the SCB valve actuator. This operation closes the SCB valve. When the ECM sends an OFF signal, the vacuum signal is cut and the SCB valve opens.