HARRIER BOOK 2

TATA MOTORS Ltd.

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SRS / Airbag

ECU – DTC Troubleshooting Guide

Version: 14.0

Date: 14-February-2017

Prepared by:Airbag CoC Review &Approved

by:Sanjeev VM

Page: 13 of 549

DTC’s confirmation:-

After rectification, ensure the following points using TML diagnostic tool before handing over to customer.

a) Clear the DTC’s & make sure no DTC’s are present for Airbag system

b) Check whether any new DTC’s are getting qualified for repeated cranking.

c) Ensure the Airbag Warning Lamp Indication is continuously ON in Instrument Cluster for

4 seconds

after

Ignition ON

d) Ensure the Airbag Warning Lamp Indication goes OFF after

4 seconds

from Ignition ON.

Circuit Schematic Diagram:-

Schematic shown below for illustration

Battery>>>>>Fuse>>>>Relay>>>>>>>Sensor/Actuator>>>>>ECU

Component Location & Image:-

Battery

A23

CAN H

Ignition Sw itch

CAN L

A12

RESTRAINTS

CONTROL

MODULE

Driver

Airbag

Fuse 10A

A15

A16

ABFD-

ABFD+

Vbat

Driver Frontal Airbag connector is present inside the steering wheel.

Fig1:Driver Frontal Airbag connector location. Fig2: - Driver Airbag module