ARIA

ENGINE 109 C. VACUUM SOLENOID VALVE The vacuum solenoid valve is an electro pneumatic solenoid switch, which is controlled by the EMS ECU based on the Engine speed, Coolant Temperature and Accelerator pedal position etc. Vacuum solenoid valve provides variable vacuum levels to operate the EGR cooler bypass valve. REMOVAL 1. Remove engine cover. 2. Disconnect all the hose connections & electrical connection from the vacuum solenoid valve. 3. Remove two mounting bolts of vacuum solenoid valve & take out the vacuum solenoid valve from its location. FITMENT 1. Fit the vacuum solenoid valve on the mounting bracket. 2. Tighten its two mounting bolts. 3. Connect the hose pipes & electrical connector to the vacuum solenoid valve. NOTE Assemble the vacuum solenoid valve hose as per marked end as indicated on the Hose and arrow mark should be at top . 4. Fit the engine cover. ! CAUTION Care should be taken to connect the ports of the vacuum solenoid valve to their respective hoses. Any interchanging of the connection will lead to mal- functioning of the EGR system. NON RETURN VALVE (NRV) This is provided to separate the brake booster vacu- um circuit from the Engine Vacuum circuit. NOTE At the time of assembly the conical side hose con- nection of NRV should point towards vacuum pump. LOCATION The NRV is located on the firewall in the line be- tween Vacuum pump and vacuum reservoir.