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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: 117 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
IS DTC STILL
PRESENT
?
1.
TURN OFF IGN, REMOVE DRIVER FIS
SENSOR
CONNECTOR FROM VEHICLE W/H.
2.
TURN ON IGNITION. CLEAR DTC’s & CHECK
FOR DTC’s.
IS DTC B100E-
12 PRESENT?
REPLACE
THE
DRIVER
FIS
YES
NO
NO
YES
NO
YES
TURN OFF
& ON THE
IGNITION &
CHECK FOR
DTC’s
IS DTC
PRESENT?
NO
CHECK WHETHER
THE VOLTAGEAT
OUTPUT PINS OF W/H C209-1 & C209-2
W.R.T VEHICLE GROUND
IS IN THE RANGE
OF 10 TO12 V
STOP
RE-CONNECT
THE ECU,
SENSOR
& W/H
MODULE IN
THE VEHICLE
NO
YES
REPLACE THE
DRIVER 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 & DRIVER
FIS IN VEHICLE.
3. TURN ON IGNITION. CLEAR DTC’s & CHECK
FOR DTC’s.
IS DTC B100E-
12 PRESENT?
START
B100E12::
Frontal Impact
Driver Sensor
circuit short to
battery
.
T
OUTPUT
PINS OF W/H C209B-1&C209B-2W.R.T VEHICLE
GROUND IS IN THE RANGE 10 O 12V.