HARRIER BOOK 2

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

Thisspecification isthe exclusive property of Tata MotorsLimited. Withouttheir consent it may not be reproduced or given to third

parties

The above specificationsare subject to change and therefore suppliersare requested to refer the latest one.

CONTROLLED COPY FOR RESTRICTED CIRCULATION

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).