4715 / 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: 446 of 549
DTC’s confirmation:-
After rectification, ensure the following points using TML diagnostic tool before handing over to customer.
u) Clear the DTC’s & make sure no DTC’s are present for Airbag system
v) Check whether any new DTC’s are getting qualified for repeated c ranking.
w) Ensure the Airbag Warning Lamp Indication is continuously ON in Instrument Cluster for
4 seconds
after
Ignition ON
x) 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. TURN OFF & ON IGNITION.
AND
CHECK FOR DTC’s (
at least
).
to 3 times
2
IS DTC
STILL
PRESENT
?
1.
READ EXISTING
AIRBAG
ECU
SYSTEM
CONFIGURATION USING
EOL or
SERVICE
TOOL.
2.
VERIFY WHETHER T
HE VEHICLE
IS HAVING
THE CORRECT
AIRBAG ECU SYSTEM
CONFIGURATION AS PER THE
VC?
IS CONFIG.
CORRECT
?
WRITE
THE CORRECT
SYSTEM
CONFIGURATION
IN AIRBAG ECU
USING EOL or
SERVICE TOOL
YES
NO
NO
YES
NO
YES
TURN OFF &
ON THE
IGNITION
&
CHECK FOR
DTC’s
IS DTC
PRESENT?
NO
STOP
RE -CONNECT
THE ECU
& W/H
MODULE IN
THE
VEHICLE
YES
TURN ON IGNITION.
CONNECT THE
DIAGNOSTIC TOOL AND CHECK FOR DTC’s
START
.
B100D-55