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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: 376 of 549
DTC’s confirmation:-
After rectification, ensure the following points using TML diagnostic tool before handing over t o customer.
e) Clear the DTC’s & make sure no DTC’s are present for Airbag system
f) Check whether any new DTC’s are getting qualified for repeated cranking.
g) Ensure the Airbag Warning Lamp Indication is continuously ON in Instrument Cluster for
4 seconds
after
Ignition ON
h) Ensure the Airbag Warning Lamp Indication goes OFF after
4 seconds
from Ignition ON.
IS DTC
PRESENT?
CLEAR DTC. TURN OFF & ON IGNITION.
IS DTC STILL
PRESENT
?
CHECK WHETHER THE DSP
SENSOR
CONNECTED TOTHE WIRING HARNESS IS
HAVING THE TML PART NUMBER
542754209910
IS PART
NUMBER
CORRECT ?
REPLACE WITH
THE CORRECT
DSP
YES
NO
NO
YES
YES
TURN OFF &
ON IGNITION.
CLEAR DTC &
CHECK FOR
DTC’s
IS DTC
PRESENT?
NO
CLEAR DTC’s. TURN OFF & ON IGNITION &
CHECK FOR DTC’s
STOP
RE-CONNECT
THE ECU,
DSP
&
W/H MODULE IN
THE VEHICLE
YES
REPLACE THE
AIRBAG ECU
WITH A NEW ONE
NO
NO
YES
IS DTC STILL
PRESENT?
START
.
TURN ON IGNITION. CONNECT THE
DIAGNOSTIC TOOL AND CHECK FOR DTC’s
B100C-4A