PEPS Part Replacement Procedure Title: PEPS System Part Replacement Procedure Spec Num 2921 XX XXX A XXXXTBD Date: 18-Aug-2022 Version: 2.1 Page: 17 of 41 Prepared: Ganesh Girase 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. { If YY == 1 && B1 == 01(Paired) i.e. first UID pairing is successful. Remove the first UID and keep the second UID within predefined time as per Start Routine Request. Send the routine result request as per step - 4 Else If YY == 2 && B1 == 01 && B2 == 01 i.e. second UID pairing is successful. Remove the existing and keep next UID and repeat same procedure up to number of UIDs to be paired. Send the routine result request as per step - 4 } Else if 4th bit (i.e. “Routine_Active” bit) of XX == 0 // routine completed { If (YY == Total number of keys to be learnt with PEPS (DID 443C)) { switch (YY) { Case 1: check B1==1; Break; Case 2: check B1==1 && B2==1; Break; Case 3: check B1==1 && B2==1 && B3==1; Break; Case 4: check B1==1 && B2==1 && B3==1 && B4==1; Break; Case 5: check B1==1 && B2==1 && B3==1 && B4==1 && B5==1; Break; Case 6: check B1==1 && B2==1 && B3==1 && B4==1 && B5==1 && B6==1; Break; Case 7: check B1==1 && B2==1 && B3==1 && B4==1 && B5==1 && B6==1 && B7==1; Break; Case 8: check B1==1 && B2==1 && B3==1 && B4==1 && B5==1 && B6==1 && B7==1 && B8==1; Break; } // END switch (YY) }// END If (YY == Total ….) Else { Pairing unsuccessful. Rectify the problem and repeat the process from step – 1. }// END }// END If XX == 01 Table 1
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