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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: 230 of 549
DTC’s confirmation:-
After rectification, ensure the following points using TML diagnostic tool before handing over to 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.
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 least 2 to 3 times).
YES
NO
NO
YES
NO
YES
TURN OFF
& ON THE
IGNITION
&
CHECK FOR
DTC’s
IS DTC
STILL
PRESENT?
NO
RE -CONNECT
THE ECU,
PADI
HW
& W/H
MODULE IN
THE
VEHICLE
NO
NO
YES
YES
YES
IS DTC
STILL
PRESENT
?
1.
TURN OFF IGN. REMOVE PADI HW
CONNECTOR
FROM VEHICLE W/H.
2.
TURN ON IGNITION
. CLEAR DTC’s & CHECK
FOR DTC’s.
IS DTC B00 D5-
12
PRESENT?
REPLACE
THE
PADI
MODULE
1.TURN OFF IGN. RECONNECT PADI HW
2.CHECK WHETHER THE VOLTAGEACROSS
OUTPUT
PINS
C176A-24 W.R.T VEHICLE
GROUND
IS IN THE RANGE OF 10
V TO
12
V
IN PAD SWITCHOFF CONDITION
.
STOP
REPLACE THE
PADI
MODULE
WITH A NEW ONE
IS VOLTAGE IS
IN 10 T0 12 V?
REPLACE AIRBAG ECU
WITH A NEW ONE.
1.
TURN OFF IGN. REPLACE AIRBAG W/H.
2. CONNECT THE AIRBAG
ECU, W/H &
PADI HW
IN VEHI CLE.
3. TURN ON IGNITION. CLEAR DTC’s & CHECK
FOR DTC’s.
IS DTC B00 D5-
12 PRESENT?
START
B00D512::
RestraintSystem
Passenger
Disable Indicator
circuit short to
battery
.