Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 197 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 Step 7 Perform EGR valve learning routine using service tool and check whether the fault is cleared - Step 8 If the problem persists, replace the EGR module - Associated Parameters: Parameter Label Description DID Monitoring Position Demand for EGR valve Position Demand for HP EGR valve FEBF “Position Demand for EGR valve” and “EGR position feedback” should match with <1% error for a constant demand while demanded using service tool in engine not running condition. EGR position feedback HP EGR valve Feedback position FEC1 Current close position counts learnt EGRH Current close position counts learnt for EGRH FEC5 Normal range – 150 to 250 cnts Current open position counts learnt EGRH Current open position counts learnt for EGRH FEC6 Normal range – 850 to 950 cnts Verification condition: Drive the vehicle at city and highway condition for 20 mins. Circuit Description: ECM in accordance with engine and driving conditions gives a electric output to directly drive a DC motor (Part of EGR module) which in turn drives the EGR valve. Hence ECM indirectly controls the opening and closing of EGR valve. EGR plays an important role in emissions control by altering rate of flow of exhaust gases from exhaust manifold. Circuit Schematic Diagram:
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