Nissan March K13. Manual — part 623
B1050 DRIVER AIRBAG MODULE
SRC-31
< DTC/CIRCUIT DIAGNOSIS >
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B1050 DRIVER AIRBAG MODULE
Description
INFOID:0000000005987894
In case of frontal collision where acceleration is more than the specified level, the ignition materials are ignited
by electric ignition system. The system burns the gas generating materials resulting in a chemical reaction.
This generates hot gases that flow into the air bag through a filter and expand the bag.
DTC Logic
INFOID:0000000005987895
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
CHECK SELF-DIAG RESULT
With CONSULT-III
1.
Turn ignition switch ON.
2.
Perform “AIR BAG” Self Diagnostic Result.
Without CONSULT-III
1.
Turn ignition switch ON.
2.
Check the air bag warning lamp status. Refer to
SRC-7, "On Board Diagnosis Function"
NOTE:
SRS does not enter the diagnosis mode if no malfunction is detected in the user mode.
Is malfunctioning part detected?
YES
>> Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005987896
WARNING:
• Before servicing, turn ignition switch OFF, disconnect battery negative terminal, and wait 3 minutes
or more. (To discharge backup capacitor.)
• Never use unspecified tester or other measuring device.
1.
CHECK HARNESS CONNECTOR
Check the harness connector.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace harness connector.
2.
CHECK WIRING HARNESS
Check the wiring harness externals.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace wiring harness.
3.
CHECK SPIRAL CABLE CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect driver air bag module connector and combination switch (spiral cable) connector.
3.
Check continuity between driver air bag module harness connector and combination switch (spiral cable)
harness connector.
DTC
Display contents of
CONSULT-III
DTC detecting condition
Possible cause
B1050
B1055
DRIVER AIRBAG
MODULE
[VB-SHORT]
Driver air bag module circuit is shorted to
power supply circuit
(including the spiral cable)
• Disconnection of wiring harness and short
• Malfunction in driver air bag module
• Malfunction in spiral cable
• Malfunction in air bag diagnosis sensor unit
SRC-32
< DTC/CIRCUIT DIAGNOSIS >
B1050 DRIVER AIRBAG MODULE
4.
Check continuity between driver air bag module harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace combination switch (spiral cable). Refer to
SR-16, "Removal and Installation"
.
4.
REPLACE AIR BAG DIAGNOSIS SENSOR UNIT
1.
Replace air bag diagnosis sensor unit. Refer to
SR-29, "Removal and Installation"
2.
Perform DTC confirmation procedure. Refer to
.
Is DTC detected?
YES
>> GO TO 5.
NO
>> INSPECTION END
5.
REPLACE DRIVER AIR BAG MODULE
1.
Replace driver air bag module. Refer to
SR-13, "Removal and Installation"
2.
Perform DTC confirmation procedure. Refer to
.
Is DTC detected?
YES
>> GO TO 1.
NO
>> INSPECTION END
Driver air bag module
Combination switch (spiral cable)
Continuity
Connector
Terminal
Connector
Terminal
M350
10
M32
28
Existed
11
30
Driver side air bag module
Ground
Continuity
Connector
Terminal
M350
10
Not existed
11
B1051 DRIVER AIRBAG MODULE
SRC-33
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
I
J
K
L
M
A
B
SRC
N
O
P
B1051 DRIVER AIRBAG MODULE
Description
INFOID:0000000005987897
In case of frontal collision where acceleration is more than the specified level, the ignition materials are ignited
by electric ignition system. The system burns the gas generating materials resulting in a chemical reaction.
This generates hot gases that flow into the air bag through a filter and expand the bag.
DTC Logic
INFOID:0000000005987898
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
CHECK SELF-DIAG RESULT
With CONSULT-III
1.
Turn ignition switch ON.
2.
Perform “AIR BAG” Self Diagnostic Result.
Without CONSULT-III
1.
Turn ignition switch ON.
2.
Check the air bag warning lamp status. Refer to
SRC-7, "On Board Diagnosis Function"
NOTE:
SRS does not enter the diagnosis mode if no malfunction is detected in the user mode.
Is malfunctioning part detected?
YES
>> Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005987899
WARNING:
• Before servicing, turn ignition switch OFF, disconnect battery negative terminal, and wait 3 minutes
or more. (To discharge backup capacitor.)
• Never use unspecified tester or other measuring device.
1.
CHECK HARNESS CONNECTOR
Check the harness connector.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace harness connector.
2.
CHECK WIRING HARNESS
Check the wiring harness externals.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace wiring harness.
3.
CHECK SPIRAL CABLE CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect driver air bag module connector and combination switch (spiral cable) connector.
3.
Check continuity between driver air bag module harness connector and combination switch (spiral cable)
harness connector.
DTC
Display contents of
CONSULT-III
DTC detecting condition
Possible cause
B1051
B1056
DRIVER AIRBAG
MODULE
[GND-SHORT]
Driver air bag module circuit is shorted to ground
(including the spiral cable)
• Disconnection of wiring harness and short
• Malfunction in driver air bag module
• Malfunction in spiral cable
• Malfunction in air bag diagnosis sensor unit
SRC-34
< DTC/CIRCUIT DIAGNOSIS >
B1051 DRIVER AIRBAG MODULE
4.
Check continuity between driver air bag module harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace combination switch (spiral cable). Refer to
SR-16, "Removal and Installation"
.
4.
REPLACE AIR BAG DIAGNOSIS SENSOR UNIT
1.
Replace air bag diagnosis sensor unit. Refer to
SR-29, "Removal and Installation"
2.
Perform DTC confirmation procedure. Refer to
.
Is DTC detected?
YES
>> GO TO 5.
NO
>> INSPECTION END
5.
REPLACE DRIVER AIR BAG MODULE
1.
Replace driver air bag module. Refer to
SR-13, "Removal and Installation"
.
2.
Perform DTC confirmation procedure. Refer to
.
Is DTC detected?
YES
>> GO TO 1.
NO
>> INSPECTION END
Driver air bag module
Combination switch (spiral cable)
Continuity
Connector
Terminal
Connector
Terminal
M350
10
M32
28
Existed
11
30
Driver side air bag module
Ground
Continuity
Connector
Terminal
M350
10
Not existed
11
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