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: 170 of 549

U1006-49:- Control Module Internal electronic failure

Overview:-

ISO Code

U100649

Customer Symptom

SRS Warning Lamp continuously ON in Instrument Cluster.

Fault Effects (On Vehicle)

Crash detection performance is degraded. Firing of any devices

is not guaranteed & none of the external device monitoring is

guaranteed.

Lamp Status (If Any)

SRS Warning Lamp continuously ON in Instrument Cluster.

Fault Detection Condition

This fault gets logged due to an internal failure in Airbag ECU.

Normal Operating Condition

Internal electronic failure should not be present.

Probable Trouble Area

Internal electronic failure of Airbag ECU.

Healing Condition

Replace the Airbag ECU with the new one (ensure the correct

configuration as per VC).

Component Details:-

Airbag ECU

:- It is fitted in the floor of central console in the car. The Airbag Electronic Control Unit (ECU) controls the

deployment system to allow an appropriate igniting of the Airbags and belt pre-tensioners to restrain the driver and

passengers.

Preliminary Checks:-

Check Battery Voltage (12 V & above)

2. Check for any faults in Airbag Warning Lamp indication in Instrument Cluster.

3. Ensure the proper locking of Airbag ECU wiring harness connectors in the vehicle by the locking sound.

Trouble Shooting:-