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: 346 of 549

B0073-12:- Second Row Left Seatbelt Pre tensioner Deployment Control circuit short to battery

Overview:-

ISO Code

B007312

Customer Symptom

SRS Warning Lamp continuously ON in Instrument Cluster.

Fault Effects (On Vehicle)

Second Row Left Seatbelt Pre tensioner Deployment Control

deployment not guaranteed, if a crash happens

Lamp Status (If Any)

SRS Warning Lamp continuously ON in Instrument Cluster.

Fault Detection Condition

This fault gets logged if any of the high side (B2) or low side pin

(B1) of Second Row Left Seatbelt Pre tensioner Deployment

Control gets shorted with battery line.

Normal Operating Condition

No short with battery should be present.

Probable Trouble Area

Related wiring Harness, connector or terminals

Second Row Left Seatbelt Pre tensioner

Airbag Wiring Harness

Airbag ECU

Healing Condition

Remove the short to battery.

Component Details:-

Second Row Left Seatbelt Pre tensioner Module

: - It is located at the rear passenger door wheel arch inner panel.

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:-