NEXON DIAGNOSTIC MANUAL

PEPS Part Replacement Procedure

Title: PEPS System Part Replacement Procedure

Spec Num 2921 XX XXX A XXXXTBD

Date:

14-Jan-17

Version:

1.2

Page: 7 of 23

Prepared:

Rakesh / Sandip

Checked:

Nagnath

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. PEPS 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 (If the issue itself is with the ignition output, i.e. IGN not 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 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:

If PEPS from another vehicle need to be used for replacement

a) PEPS between same VCs/trim levels shall be replaced.

b) In case PEPS need to be exchanged between different VCs/trim levels, PEPS shall

be flashed (Calibration & Application files) using the flashing tool before performing

the below given replacement procedure.