HARRIER BOOK 2

TATA MOTORS Ltd.

This document must not be used in any way, such as copying and redistributing to third parties, without the consent of

author.

Restraints Control Module (SRS / Airbag) -ECU Replacement Procedure

Version: 4.0

Date: 29-10--2016

Author: Airbag CoC, ERC

Page: 4 of 7

6. PADI Switch Configuration ($22 40 18)

7. CAN Node Configuration ($22 40 19)

8. SBR+Chime Configuration ($22 40 1A)

9. CAL parameter number ($22 40 11) (

Unique identification number of

Calibration

). Also compare the CAL parameter ID (last 3 bytes of the response)

with the server data.

10. ECU Customer mode ($22 40 13)

Steps for SRS (Airbag) ECU cannibalizing (try out) during Service

Please refer Annexure 1 of SRS ECU Serviceability document version 2 (Serviceability_SRS_ECU_v

2.doc).

Cannibalization meaning: - to remove a part from a vehicle to repair or make a similar unit.

1. Connect the Service tool to vehicle OBD connector.

2. Turn ON Ignition, Clear the DTC’s and Check for DTC’s in both the Airbag ECU’s.

3. Read the ECU Assembly number ($22 72 34) using service tool and compare it with Look up

table/PLM server (or with old ECU) as per defined VC. It should match with the existing ECU

data.

4. Read ECU Parameterization number using service tool ($22 72 44) and compare with Look up

table/PLM server (or with old ECU) as per defined VC. It should match with the existing ECU

data.

If both the Assembly number & Parameterization number matches then only ECU replacement

will be allowed, otherwise not.

Vehicle should not be allowed outside the Service station with the Cannibalized ECU from

another vehicle.