We are not as informed if you don't post this for us. Great post FCP1645-SUPERCHARGER BYPASS VALVE ACTUATOR CONTROL SYSTEM - UNABLE TO CLOSE
Theory of Operation
The Supercharger boost pressure is managed by the use of a Supercharger Bypass (SCB) Valve. The PCM can vary the position of the SCB Valve to control the amount of boost. The SCB system uses two Position Sensors to monitor the SCB blade position. Position Sensors are located within the SCB Valve assembly. Each sensor has its own Signal circuit. Both sensors share a 5-Volt reference circuit (Supply) and a low reference circuit (Sensor Return). The Powertrain Control Module (PCM) monitors the SCB Valve Sensor data. Each Signal circuit provides the PCM with a signal voltage proportional to SCB blade movement. The PCM monitors the data to verify that the indicated SCB position is correct.
When Monitored and Set Conditions
When Monitored: This diagnostic runs when the following conditions are met:
- With the ignition on.
- The air charge temperature is above -10°C (14°F).
- Supercharger Bypass Valve Self Learn procedure completed.
- When the Powertrain Control Module (PCM) detects that the Supercharger Bypass Valve is not in the correct position when checked during the opening spring return test for 0.6 seconds.
- The MIL light will illuminate.
- The ETC light will flash.
COKING OR BLOCKAGE OF THE THROTTLE PLATE
SUPERCHARGER BYPASS VALVE