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: 141 of 549

B100F-86:- Frontal Impact Passenger sensor signal invalid

Overview:-

ISO Code

B100F86

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 an invalid signal is obtained from Frontal

Impact Passenger Sensor.

Normal Operating Condition

Proper signal should be obtained from Frontal Impact Passenger

Sensor.

Probable Trouble Area

Related wiring Harness, connector or terminals

Frontal Impact Passenger sensor

Airbag Wiring Harness

Airbag ECU

Healing Condition

Airbag ECU & Wiring Harness should be checked for any shorts,

bents or damage & it needs to be rectified.

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:-