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ESCL ECU Replacement Procedure
Title: ESCL Part Replacement Procedure
Spec Num 2921 XX XXX A XXXXTBD
Date:
30-Jul-18
Version:
1.1
Page: 6 of 10
Prepared:
Hitesh K.
Checked:
Awanish T.
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
© TATA MOTORS LTD.
2. ESCL 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 below procedure.
2) Connect the diagnostic tool toOBD connector.
3) Turn the IGNON.
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).