Nexon_WPCF ECU Service guide and replacement procedure Title: Nexon_WPCF ECU Service guide and replacement procedure Spec Num 2921 XX XXX A XXXXTBD Date: 22-May-2021 Version: 2.1 Page: 4 of 24 Prepared: Swati Yogi Checked: Awanish T. Approved: Himanshu Saxena This specification is the exclusive property of Tata Motors Limited. Without their consent, it may not be reproduced or given to third parties. The above specifications are subject to change and therefore suppliers are requested to refer the latest one. CONTROLLED COPY FOR RESTRICTED CIRCULATION © TATA MOTORS LTD. TABLE OF CONTENTS 1. Introduction ......................................................................................................................... 6 1.1. General .............................................................................................................................. 6 1.2. Document Scope................................................................................................................ 6 1.3. Terminologies .................................................................................................................... 6 2. WPCF ECU component and interface diagram ................................................................. 8 2.1. Components....................................................................................................................... 8 2.1. Interface diagram ............................................................................................................. 10 3. WPCF ECU trouble shooting procedure.......................................................................... 12 3.1. Pre-checks/tasks for trouble shooting the WPCF ECU ..................................................... 12 3.1.1. Check – T1 ................................................................................................................ 12 3.1.2. Check – T2 ................................................................................................................ 13 3.1.3. Check – T3 ................................................................................................................ 16 3.1.4. Check – T4 ................................................................................................................ 17 4. WPCF ECU Assembly Replacement Procedure .............................................................. 18 4.1. Pre-checks/tasks to be done before replacing the WPCF ECU Assembly........................ 18 4.2. ECU Assembly replacement procedure............................................................................ 18 4.3. If WPCF ECU assembly is replaced ................................................................................. 23
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