Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 287 of 834 Copyright by TATA MOTORS Ltd. This document must not be used in any w ay, such as copying and redistributing to third parties, w ithout our consent Step7 Check low pressure fuel side (fuel in tank, priming pump, back leak hose T connector choked) if any problem rectify Step8 Check injector back leak flow, perform injector back leak test. If problem present replace injector Associated Parameters: Parameter Label Description DID Monitoring Main injection fuel demand chkd. Main injection fuel demand. FE65 Ranges from 1 mg/st to 55 mg/st based on engine load IMV current demand IMV current demanded by the ECU FE14 Both labels closely matches in normal operation. Measured current in the IMV actuator IMV current feedback to the ECU FE61 State of the rail pressure control State of the rail pressure control FE63 Rail pressure control state to be noted Rail pressure error Rail pressure error FE20 Error should be less than 100 bar for normal operation Rail pressure feedback Rail pressure sensor feedback FE1 A Maintains above 150 bar in cranking Verification condition: Drive the vehicle in city and highway condition. Component Details: Inlet Metering Valve (IMV) regulates the amount of fuel discharged from fuel pump to common rail. It meters the fuel flowing into the high-pressure fuel pump by a variable solenoid valve. IMV is mounted on high pressure fuel pump Rail pressure sensor is used to measure fuel pressure inside the common rail and facilitates a closed loop control of the injection pressure. It is mounted on common rail which is fitted above intake manifold on the cylinder head. Fuel is maintained at different pressure magnitudes in the common rail depending on the requirement of various engine operating conditions The high-pressure fuel pump (HP pump) is the interface between the low-pressure and high-pressure stages. It discharges fuel into common rail and ensures that there is always sufficient fuel available under pressure in all engine operating conditions; Integrated inlet metering valve (IMV) controls the fuel flow rate into the common rail to generate desired pressure. Pump is mounted on engine front, inside timing drive front cover.
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