PEPS Part ReplacementProcedure Title: PEPS System Part Replacement Procedure Spec Num 2921 XX XXX A XXXXTBD Date: 28-Jul-18 Version: 1.5 Page: 8 of 25 Prepared: Sandip Checked: Santosh B Approved: Dinesh DG Thisspeci fication is the exclusive property of Tata MotorsLimited. Wi thout their consent i t may not be reproduced or given to thi rd parties. The above speci ficationsare subject to change and therefore suppl iersare requested to refer the latest one. CONTROLLED COPY FOR RESTRICTED CIRCULATION © TATA MOTORS LTD. 2. PEPS ECUReplacement Procedure 2.1. Pre-checks/tasks to be done before replacingthe 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 belowprocedure. 2) Connect the diagnostic tool to OBD connector. 3) Turn the IGN ON (If the issue itself is with the ignition output, i.e. IGNnot turning ON through PEPS ECU, then turn ON the IGN by short linking the IGN relay with battery supply). 4) Perform step 11 to step 29 as mentioned in section 2.2. 5) Check the customer reported fault, whether it is rectified. 6) If the fault is rectified, disconnect the OBD connector and diagnostic tool and remove the short at the IGN relay if made (at step 3 above). 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). 2.2. ECU replacement procedure Prerequisite: 1) Gateway (Instrument Cluster) shall be functional. 2) Smart keys / UIDs / wearable to be learnt with PEPS shall be available. 3) Latest vehicle configuration/parameter data shall be available on the server. 4) New PEPS ECU shall be available for replacement. NOTES: It is no allowed to take PEPS ECU fromanother vehicle for replacement. Take a new ECU always. PROCEDURE: 1) Disconnect the battery. 2) Locate the PEPS ECU (Refer Figure 1 for location of the PEPS). 3) Remove all the PEPS ECU connectors (Refer Figure 2 for PEPS connector).
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