4426 / 4910
Copyright ©
TATA MOTORS Ltd.
This document must not be used in any w ay, such as copying and redistributing to third parties, w ithout the consent of author.
SRS / Airbag
ECU – DTC Troubleshooting Guide
Version: 14.0
Date: 14-February-2017
Prepared by:Airbag COC Review &
Approved by:Sanjeev VM
Page: 157 of 549
DTC’s confirmation:-
After rectification, ensure the following points using TML diagnostic tool before handing over to customer.
a) Clear the DTC’s & make sure no DTC’s are present for Airbag system
b) Check whether any new DTC’s are getting qualified for repeated cranking.
c) Ensure the Airbag Warning Lamp Indication is continuously ON in Instrument Cluster for
4 seconds
after
Ignition ON
d) Ensure the Airbag Warning Lamp Indication goes OFF after
4 seconds
from Ignition ON.
Circuit Schematic Diagram:-
Schematic shown below for illustration
Battery>>>>>Fuse>>>>Relay>>>>>>>Sensor/Actuator>>>>>ECU
IS DTC
PRESENT?
CLEAR DTC
’s
. TURN OFF & ON IGNITION
.
CHECK FOR DTC’s
)
(2
to 3 times
IS DTC
STILL
PRESENT
?
1.REPLACE THE
PASSENGER
FIS
SENSOR.
2.TURN OFF
& ON THE
IGNITION.
3. CLEAR DTC’s
4.CHECK WHETHER THE DTC IS STILL
PRESENT.
IS DTC
PRESENT?
REPLACE
THE
ECU WITH A
NEW ONE
YES
NO
NO
YES
YES
NO
TURN OFF &
ON
IGNITION.
CLEAR DTC
& CHECK
FOR DTC’s
IS DTC
STILL
PRESENT?
NO
STOP
RE-CONNECT THE
ECU
)
NEW
(
,
PASSENG ER FIS
SENSOR
& W/H
MODULE IN
THE
VEHICLE
YES
START
B100F64::
Frontal Impact
Passenger
Sensorsignal
plausibility
failure.
TURN ON IGNITION.
CONNECT THE
DIAGNOSTIC TOOL AND CHECK FOR DTC’s