SAFARI

110 ENGINE2.2LDICOR EGRpipe This pipe connects the exhaust manifold to the EGR valve. Through this pipe Exhaust gas is routed to the intake manifold and mixes with the fresh air. ECU The EGR system of the vehicle is controlled more precisely based on environmental conditions such as atmospheric pressure, air temperature, engine conditions (engine speed, pedal position, coolant temperature etc).The ECU is mounted inside the engine compartment. NOTE l Ensure that exhaust systemand catalytic converter are not blocked and are free from obstruction. l Blockages in the exhaust can create back pressure, low top speed, poor pick up, black smoke, carbon build up and low mileage. l Check and ensure EGRValve &Control System is Clean and functioning properly. l Damaged or pinched vacuum lines / wrong connections of vacuum pipes. l EGR-EVRV, Turbocharger-EVRV aresame. Ensure that correct connections can made on both of these EVRVs. Interchanging these connection can keep the 'EGR' open when not desired and vice versa. Either way these can seriously affect power output of the engine and also the emission levels. Electronic VacuumRegulating Valve (EVRV) (Fig. 225) The EVRV is an electro pneumatic solenoid switch, which is controlled more precisely by the ECU, based on the Engine speed, Coolant Temperature and Accelerator pedal position etc. EVRV provides variable vaccum levels to drive EGR&VNT. NOTE Care should be taken to connect the ports of the EVRV to their respective hoses. Any interchanging of the connections will lead to malfunctioning of the EGR system. EGRSYSTEMCOMPONENTS EGRValve (Fig. 224) The EGR valve is a diaphragmvalve that is actuated by vacuum from the Vacuum Pump through EVRV.The valve is fitted to EGR cooler which is mounted on the inlet manifold. It has three connections, one for the vacuum, one for the exhaust gas inlet from the exhaust manifold and one for the exhaust gas outlet to the inlet manifold. The exhaust gas starts flowing into the inlet manifold once the vacuum is fed into the valve. Fig. 224 Fig. 225