Infiniti EX35. Manual — part 1354
SRC-42
< COMPONENT DIAGNOSIS >
B1050, B1055 DRIVER AIRBAG MODULE
B1050, B1055 DRIVER AIRBAG MODULE
Description
INFOID:0000000003591770
DTC B1050, B1055 [VB-SHORT] DRIVER AIRBAG MODULE
For driver air bag module, crash is judged by main “G” sensor output signal and Safing algorithm in front direc-
tion.
OPERATION
In case of frontal collision whose acceleration exceeds the specified level, the ignition materials are ignited by
electric ignition system. The system burns and introduces the chemical reaction of gas generating materials to
generate hot gases that flow into the air bag through a filter and expand the bag.
STRUCTURE
Driver air bag module mainly consists of air bag and inflator which inflates air bag.
INSTALLATION
Driver air bag module is installed on the center of steering wheel with fixed bolts.
DTC Logic
INFOID:0000000003591771
DTC DETECTION LOGIC
With CONSULT-III
DTC No. Index (“SELF-DIAG [CURRENT]”), (“SELF-DIAG [PAST]” or “TROUBLE DIAG RECORD”)
DTC CONFIRMATION PROCEDURE (WITH CONSULT-III)
1.
CHECK SELF-DIAG RESULT
1.
Turn ignition switch ON.
2.
Check the screen of CONSULT-III.
Is malfunctioning part detected?
YES
>> Refer to
NO
>> INSPECTION END
DTC CONFIRMATION PROCEDURE (WITHOUT CONSULT-III)
NOTE:
• SRS will not enter diagnosis mode if no malfunction is detected in user mode.
1.
CHECK AIR BAG WARNING LAMP
1.
Turn ignition switch ON.
2.
Check the air bag warning lamp status.
Is malfunctioning part detected?
YES
>> Refer to warning lamp flash code chart. Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000003591772
WITH CONSULT-III
WARNING:
• Before servicing, turn ignition switch OFF, disconnect battery negative terminal and wait at least 3
minutes. (To discharge backup capacitor.)
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
B1050
B1055
DRIVER AIRBAG MOD-
ULE
[VB-SHORT]
Driver air bag module circuit is shorted
to some power supply circuit
(including the spiral cable)
• Disconnection of wiring harness and
short
• Internal breakdown in driver air bag
module
• Internal breakdown in spiral cable
• Internal breakdown in air bag diag-
nosis sensor unit
B1050, B1055 DRIVER AIRBAG MODULE
SRC-43
< COMPONENT DIAGNOSIS >
C
D
E
F
G
I
J
K
L
M
A
B
SRC
N
O
P
• Do not use unspecified tester or other measuring device.
DIAGNOSTIC PROCEDURE
1.
CHECK HARNESS CONNECTOR
Check the connection of 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 side air bag module harness connector and body side harness connector.
3.
Check continuity between driver side air bag module harness connector and body side harness connec-
tor.
4.
Check continuity between driver side air bag module harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace spiral cable. Refer to
SR-6, "Removal and Installation"
4.
CHECK DRIVER AIR BAG MODULE
1.
Replace driver air bag module. Refer to
.
2.
Check “Self diagnostic result” with CONSULT-III.
3.
Perform DTC confirmation procedure. Refer to
.
Is DTC detected?
YES
>> GO TO 5.
NO
>> INSPECTION END
5.
CHECK AIR BAG DIAGNOSIS SENSOR UNIT
1.
Replace driver air bag diagnosis sensor unit. Refer to
.
2.
Check “Self diagnostic result” with CONSULT-III.
3.
Perform DTC confirmation procedure. Refer to
.
Is DTC detected?
YES
>> GO TO 1.
NO
>> INSPECTION END
Driver side air bag module
harness connector
Terminal
Body side harness
connector
Terminal
Continuity
M302
10
M35
28
Existed
11
30
M301
12
29
9
30
Driver side air bag module harness con-
nector
Terminal
Ground
Continuity
M302
10
Not existed
11
M301
12
9
SRC-44
< COMPONENT DIAGNOSIS >
B1051, B1056 DRIVER AIRBAG MODULE
B1051, B1056 DRIVER AIRBAG MODULE
Description
INFOID:0000000003591773
DTC B1051, B1056 [GND-SHORT] DRIVER AIRBAG MODULE
For driver air bag module, crash is judged by main “G” sensor output signal and Safing algorithm in front direc-
tion.
OPERATION
In case of frontal collision whose acceleration exceeds the specified level, the ignition materials are ignited by
electric ignition system. The system burns and introduces the chemical reaction of gas generating materials to
generate hot gases that flow into the air bag through a filter and expand the bag.
STRUCTURE
Driver air bag module mainly consists of air bag and inflator which inflates air bag.
INSTALLATION
Driver air bag module is installed on the center of steering wheel with fixed bolts.
DTC Logic
INFOID:0000000003591774
DTC DETECTION LOGIC
With CONSULT-III
DTC No. Index (“SELF-DIAG [CURRENT]”), (“SELF-DIAG [PAST]” or “TROUBLE DIAG RECORD”)
DTC CONFIRMATION PROCEDURE (WITH CONSULT-III)
1.
CHECK SELF-DIAG RESULT
1.
Turn ignition switch ON.
2.
Check the screen of CONSULT-III.
Is malfunctioning part detected?
YES
>> Refer to
NO
>> INSPECTION END
DTC CONFIRMATION PROCEDURE (WITHOUT CONSULT-III)
NOTE:
• SRS will not enter diagnosis mode if no malfunction is detected in user mode.
1.
CHECK AIR BAG WARNING LAMP
1.
Turn ignition switch ON.
2.
Check the air bag warning lamp status.
Is malfunctioning part detected?
YES
>> Refer to warning lamp flash code chart. Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000003591775
WITH CONSULT-III
WARNING:
• Before servicing, turn ignition switch OFF, disconnect battery negative terminal and wait at least 3
minutes. (To discharge backup capacitor.)
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
B1051
B1056
DRIVER AIRBAG MOD-
ULE
[GND-SHORT]
Driver air bag module circuit is shorted
to ground
(including the spiral cable)
• Disconnection of wiring harness and
short
• Internal breakdown in driver air bag
module
• Internal breakdown in spiral cable
• Internal breakdown in air bag diag-
nosis sensor unit
B1051, B1056 DRIVER AIRBAG MODULE
SRC-45
< COMPONENT DIAGNOSIS >
C
D
E
F
G
I
J
K
L
M
A
B
SRC
N
O
P
• Do not use unspecified tester or other measuring device.
DIAGNOSTIC PROCEDURE
1.
CHECK HARNESS CONNECTOR
Check the connection of 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 side air bag module harness connector and body side harness connector.
3.
Check continuity between driver side air bag module harness connector and body side harness connec-
tor.
4.
Check continuity between driver side air bag module harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace spiral cable. Refer to
SR-6, "Removal and Installation"
4.
CHECK DRIVER AIR BAG MODULE
1.
Replace driver air bag module. Refer to
.
2.
Check “Self diagnostic result” with CONSULT-III.
3.
Perform DTC confirmation procedure. Refer to
.
Is DTC detected?
YES
>> GO TO 5.
NO
>> INSPECTION END
5.
CHECK AIR BAG DIAGNOSIS SENSOR UNIT
1.
Replace driver air bag diagnosis sensor unit. Refer to
.
2.
Check “Self diagnostic result” with CONSULT-III.
3.
Perform DTC confirmation procedure. Refer to
.
Is DTC detected?
YES
>> GO TO 1.
NO
>> INSPECTION END
Driver side air bag module
harness connector
Terminal
Body side harness
connector
Terminal
Continuity
M302
10
M35
28
Existed
11
30
M301
12
29
9
30
Driver side air bag module harness con-
nector
Terminal
Ground
Continuity
M302
10
Not existed
11
M301
12
9
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