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.