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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: 536 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 syst em
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.
TURN ON IGNITION.CONNECT THE
DIAGNOSTIC TOOL AND CHECK FOR DTC’s
IS DTC
PRESENT?
CLEAR DTC
. TURN OFF & ON IGNITION &
CHECK FOR DTC’s (at least2
to 3 times)
IS DTC
STILL
PRESENT
?
TURN OFF IGNTION. ANDREPLACE
THE AIRBAG WIRING HARNESS
WITH A NEW ONE.
YES
NO
NO
YES
NO
TURN OFF &
ON IGNITION
.
CLEAR DTC’s
& CHECK FOR
DTC’s
IS DTC
PRESENT?
NO
STOP
YES
TURN ON IGNITION.
CLEAR DTC’s& CHECK FOR DTC’s.
RE-CONNECT THE
AIRBAG ECU, W/H
& PSP
MODULE
IN
VEHICLE
1.TURN OFF IGNITION.
2.REPLACE THE AIRBAG ECU WITHA NEW
ONE
IS DTC
STILL
PRESENT?
YES
START
.
B100D-2B