Vacuum Control Solenoids (Where Fitted)
| ITEM | DESCRIPTION |
|---|---|
| 1 | Vacuum reservoir |
| 2 | Vacuum connection to turbine intake shut-off valve (secondary turbocharger) |
| 3 | Turbine intake shut-off valve solenoid |
| 4 | Charge air shut-off valve solenoid |
| 5 | Pipe from left air cleaner |
| 6 | Pipe to cooling bypass solenoid of Exhaust Gas Recirculation (EGR) system |
| 7 | Pipe to vacuum actuator of charge air shut-off valve |
| 8 | Non return valve |
| 9 | Pipe from vacuum pump |
The turbine intake shut-off valve and charge air shut-off valve solenoids are installed on a bracket attached to the front of the Bank 2 cylinder head. The ECM operates the solenoids to apply and release the vacuum in the vacuum actuators of the turbine intake shut-off valve (located on the secondary turbocharger) and the charge air shut-off valve.
The vacuum for the actuators is produced by the vacuum pump on the rear of the Bank 1 cylinder head. For additional information, Refer to: ENGINE
The solenoids are normally-closed valves installed in the vacuum line between the vacuum reservoir and their related vacuum actuator. Each solenoid is also connected to a line from the left air cleaner, which allows air into the vacuum lines to the actuators when the solenoids are de-energized.