ZEST BOLT Service Manual

Revotron 1.2T 164 able to endure up to 2100 bar inlet pressure for 10 hours and the injector characteristics remain within original tolerances when a normal operating pressure is used after this condition. The fuel injector is solenoid ball valve, top feed with a 2 pin connector. The solenoid valve normally closed by a ball and a cone seat, opens when the electromagnetic core is energized. Fuel under pressure in common rail flows through metering orifice, where fine atomization of the fuel takes place and flows consistently for a given injector opening time. The injector which is normally in closed position, receives drive signal from ECU to open for a given pulse width (few milli seconds), depending on the engine operating conditions. Sensor Stand alone Diagnosis : Connector details : Injector 1 1. ECU pin M2H2 : signal 2. supply voltage - 12V Injector 2 1. ECU pin M2G3 : signal 2. supply voltage - 12V Injector 3 1. ECU pin M2G2 : signal 2. supply voltage - 12V Injector 4 1. ECU pin M2H3 : signal 2. supply voltage - 12V Use multimeter to check coil resistance which should be 12.25ohms ± 0.5ohms vi. Electronic Throttle Body : Component Details : A DC motor drive is used to move the throttle valve over the complete movement range. The DC motor is directly controlled by the ECU of the Diesel engine. Throttle Valve H-bridge driver of EMS ECU provides bidirectional control with active recirculation and over current detection. Component Location : The throttle position sensor is mounted on intake manifold upstream side. Preliminary Checks : 1. Please check whether dust/mud/any particle is blocking throttle valve. 2. Please check whether the throttle valve is stuck closed. 3. Please check for any throttle body related faults and rectify those faults by following their rectification procedure.