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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: 152 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.
TURN ON IGNITION.
CONNECT THE
DIAGNOSTIC TOOL AND CHECK FOR DTC’s
IS DTC
PRESENT?
CLEAR DTC
& CHECK FOR DTC’s
IS DTC
STILL
PRESENT
?
1.
TURN OF F IGN,
REMOVE
PASSENG
ER FIS
SENSOR
CONNECTOR FROM VEHICLE W/H.
2.
TURN ON IGNITION
. CLEAR DTC’s & CHECK
FOR DTC’s.
IS DTC B 100F-
12
PRESENT?
REPLACE
THE
PASSENGER
FIS
YES
NO
NO
YES
NO
YES
TURN OFF
& ON THE
IGNITION
&
CHECK FOR
DTC’s
IS DTC
STILL
PRESENT?
NO
CHECK WHETHER THE VOLTAGEA
T
OUTPUT
PINS OF W/ H C229-1 & C229-2
W.R.T VEHICLE GROUND
IS IN THE RANGE
OF
10
TO
V
12
STOP
RE -CONNECT
THE ECU,
PASSENGER
FIS & W/H
MODULE IN
THE
VEHICLE
NO
YES
REPLACE THE
PASSENGER
FIS
SENSOR
IS VOLTAGE IS
IN 10 T0 12 V?
REPLACE AIRBAG ECU
WITH A NEW ONE.
YES
YES
NO
1.
TURN OFF IGN. REPLACE AIRBAG W/H.
2. CONNECT THE AIRBAG
ECU, W/H &
PASSENGER
FIS IN VEHICLE.
3. TURN ON IGNITION. CLEAR DTC’s & CHECK
FOR DTC’s.
IS DTC B 100F-
PRESENT?
12
START
B100F12::
Frontal Impact
Passenger
Sensor circuit
short to
battery
.
T T
LT T OUTPUT
PINS OF W/H C229B-1&C229B-2W.R.T VEHICLE
GROUND IS IN THE RA GE 10 TO 12V.