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: 166 of 549

U1006-43:- Control Module Internal special memory failure

Overview:-

ISO Code

U100643

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 if:

1. EOL programming disturbed due to interrupted power

supply.

2. EEPROM is corrupted due to internal micro issues.

Normal Operating Condition

Special memory failure should not be present.

Probable Trouble Area

EOL programming, Airbag

ECU.

Healing Condition

1. Clear DTC. Turn OFF & ON Ignition & Check for DTC’s.

2. If DTC is still present, 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:-

1. 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:-