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: 136 of 549

B100F-4A:- Frontal Impact Passenger Sensor Incorrect component installed

Overview:-

ISO Code

B100F4A

Customer Symptom

SRS Warning Lamp continuously ON in Instrument Cluster.

Fault Effects (On Vehicle)

Front Crash detection performance is degraded &

Front Passenger angular crash detection is not guaranteed.

Lamp Status (If Any)

SRS Warning Lamp continuously ON in Instrument Cluster.

Fault Detection Condition

This fault gets logged if a wrong sensor with different part number

is connected in place of Frontal Impact Passenger sensor.

Normal Operating Condition

Sensor with correct TML Part number as per VC should be

connected in place of Frontal Impact Passenger sensor.

Probable Trouble Area

Related wiring Harness, connector or terminals

Frontal Impact Passenger Sensor

Airbag ECU

Airbag Wiring Harness

Healing Condition

Sensor with correct TML Part number as per VC should be

connected in place of Frontal Impact Passenger sensor.

Component Details:-

Frontal Impact Sensor

:- It is usually located in the radiator support vertical member. Front impact sensors collect the

data necessary to make decisions about Airbag deployment.

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.

Check whether the Frontal Impact Passenger sensor is connected properly to the wiring harness.

Ensure the proper locking of the Frontal Impact Passenger sensor to the wiring harness connector.

Trouble Shooting:-