ESCL ECU Replacement Procedure Title: ESCL Part Replacement Procedure Spec Num 2921 XX XXX A XXXXTBD Date: 09-Aug-19 Version: 1.3 Page: 6 of 12 Prepared: Nilesh S. Checked: Sabal V/Awanish T. Approved: Dinesh DG 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. 2. ESCL ECU Replacement Procedure 2.1. Pre-checks/tasks to be done before replacing the ECU 1) After performing all the necessary checks as per the troubleshooting guide, at wire harness, switches, relays etc., and if no root cause is found, then follow the below procedure. 2) Connect the diagnostic tool to OBD connector. 3) Turn the IGN ON. 4) Perform step 12 to step 21 as mentioned in the section 2.2 (PROCEDURE) 5) Check the customer reported fault, whether it is rectified. 6) If the fault is rectified, disconnect the OBD connector and diagnostic tool. If step 5 (above) is NOT OK, i.e. fault is not rectified, follow the replacement procedure given below. Remove the short linking the IGN relay with battery supply if made (at step 3 above).
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