Infiniti G37 Coupe. Manual — part 1198
SRC-42
< COMPONENT DIAGNOSIS >
B1049, B1054 DRIVER AIRBAG MODULE
>> GO TO 2.
2.
CHECK AIR BAG WARNING LAMP
Check the warning lamp status.
Is malfunctioning part detected?
YES
>> Refer to
.
NO
>> INSPECTION END.
Diagnosis Procedure (Component diagnosis)
INFOID:0000000001694520
With CONSULT-lll
WARNING:
• Before servicing, turn ignition switch OFF, disconnect both battery terminals and wait at least 3 min-
utes. (To discharge backup capacitor.)
• 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
>> Repair or replace harness connector.
2.
CHECK WIRING HARNESS
Check the wiring harness externals.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace wiring harness.
3.
CHECK DRIVER AIR BAG MODULE
1.
Replace driver air bag module.
2.
Check the screen of CONSULT-III.
Is the inspection result normal?
YES
>> INSPECTION END.
NO
>> GO TO 4.
4.
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.
Driver side air bag module
harness connector
Terminal
Body side harness
connector
Terminal
Continuity
M302
10
11
M35
28
30
Existed
M301
9
12
30
29
Driver side air bag module harness con-
nector
Terminal
Ground
Continuity
M302
10
11
Not existed
M301
9
12
B1049, B1054 DRIVER AIRBAG MODULE
SRC-43
< COMPONENT DIAGNOSIS >
C
D
E
F
G
I
J
K
L
M
A
B
SRC
N
O
P
Is the inspection result normal?
YES
>> Check the intermittent incident. Refer to
GI-38, "Intermittent Incident"
.
NO
>> Replace spiral cable.
SRC-44
< COMPONENT DIAGNOSIS >
B1050, B1055 DRIVER AIRBAG MODULE
B1050, B1055 DRIVER AIRBAG MODULE
Description
INFOID:0000000001694521
DTC B1050, B1055 [VB-SHORT] DRIVER AIRBAG MODULE
For driver air bag module, crash is judged by main “G” sensor output signal and sub “G” sensor 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:0000000001694522
DTC DETECTION LOGIC
With CONSULT-lll
DTC No. Index (“SELF-DIAG [CURRENT]”), (“SELF-DIAG [PAST]” or “TROUBLE DIAG RECORD”)
DTC CONFIRMATION PROCEDURE (With CONSULT-lll)
1.
INSPECTION START
Turn ignition switch ON.
>> GO TO 2.
2.
CHECK SELF-DIAG RESULT
Check the screen of CONSULT-lll.
Is malfunctioning part detected?
YES
>> Refer to
SRC-45, "Diagnosis Procedure (Component diagnosis)"
NO
>> INSPECTION END.
DTC CONFIRMATION PROCEDURE (Without CONSULT-lll)
NOTE:
• SRS will not enter diagnosis mode if no malfunction is detected in user mode.
1.
INSPECTION START
Turn ignition switch ON.
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 diagnosis sen-
sor unit (ACU).
B1050, B1055 DRIVER AIRBAG MODULE
SRC-45
< COMPONENT DIAGNOSIS >
C
D
E
F
G
I
J
K
L
M
A
B
SRC
N
O
P
>> GO TO 2.
2.
CHECK AIR BAG WARNING LAMP
Check the warning lamp status.
Is malfunctioning part detected?
YES
>> Refer to
.
NO
>> INSPECTION END.
Diagnosis Procedure (Component diagnosis)
INFOID:0000000001694523
With CONSULT-lll
WARNING:
• Before servicing, turn ignition switch OFF, disconnect both battery terminals and wait at least 3 min-
utes. (To discharge backup capacitor.)
• 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
>> Repair or replace harness connector.
2.
CHECK WIRING HARNESS
Check the wiring harness externals.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace wiring harness.
3.
CHECK DRIVER AIR BAG MODULE
1.
Replace driver air bag module.
2.
Check the screen of CONSULT-III.
Is the inspection result normal?
YES
>> INSPECTION END.
NO
>> GO TO 4.
4.
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.
Driver side air bag module
harness connector
Terminal
Body side harness
connector
Terminal
Continuity
M302
10
11
M35
28
30
Existed
M301
9
12
30
29
Driver side air bag module harness con-
nector
Terminal
Ground
Continuity
M302
10
11
Not existed
M301
9
12
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