Infiniti FX35, FX50 (S51). Manual — part 1729
B1087 PRE-TEN FRONT LH
SRC-81
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
I
J
K
L
M
A
B
SRC
N
O
P
B1087 PRE-TEN FRONT LH
Description
INFOID:0000000005241148
For front LH seat belt pre-tensioner, crash is judged by main “G” sensor output signal and safing algorithm in
front direction.
OPERATION
In the case of a frontal collision that exceeds specified impact level, the air bag diagnosis sensor unit detects
the deceleration caused by collision. It restrains the passenger with seat belt easing the stress on passengers
chest with load limiter.
STRUCTURE
The restraint system for front seat occupant consists of the pre-tensioner mechanism and load limiter mecha-
nism.
INSTALLATION
Front LH seat belt pre-tensioner is installed on the underside of center pillar with fixed nuts.
DTC Logic
INFOID:0000000005241149
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-16, "Air Bag Warning Lamp Diagnosis"
.
NOTE:
SRS does not enter diagnosis mode if no malfunction is detected in user mode.
Is malfunctioning part detected?
YES
>> Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005241150
WARNING:
• Before servicing, turn ignition switch OFF, disconnect battery negative terminal and wait at least 3
minutes. (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?
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
B1087
PRE-TEN FRONT LH
[VB-SHORT]
Front LH seat belt pre-tensioner circuit
is shorted to some power supply circuit
• Disconnection of wiring harness and
short
• Malfunction in front LH seat belt pre-
tensioner
• Malfunction in air bag diagnosis sen-
sor unit
SRC-82
< DTC/CIRCUIT DIAGNOSIS >
B1087 PRE-TEN FRONT LH
YES
>> GO TO 3.
NO
>> Replace wiring harness.
3.
REPLACE FRONT SEAT BELT PRE-TENSIONER
1.
Replace front LH seat belt pre-tensioner. Refer to
SB-6, "SEAT BELT RETRACTOR : Exploded View"
2.
Perform DTC confirmation procedure. Refer to
.
Is DTC detected?
YES
>> GO TO 4.
NO
>> INSPECTION END
4.
REPLACE AIR BAG DIAGNOSIS SENSOR UNIT
1.
Replace air bag diagnosis sensor unit. Refer to
2.
Perform DTC confirmation procedure. Refer to
.
Is DTC detected?
YES
>> GO TO 1.
NO
>> INSPECTION END
B1088 PRE-TEN FRONT LH
SRC-83
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
I
J
K
L
M
A
B
SRC
N
O
P
B1088 PRE-TEN FRONT LH
Description
INFOID:0000000005241151
For front LH seat belt pre-tensioner, crash is judged by main “G” sensor output signal and safing algorithm in
front direction.
OPERATION
In the case of a frontal collision that exceeds specified impact level, the air bag diagnosis sensor unit detects
the deceleration caused by collision. It restrains the passenger with seat belt easing the stress on passengers
chest with load limiter.
STRUCTURE
The restraint system for front seat occupant consists of the pre-tensioner mechanism and load limiter mecha-
nism.
INSTALLATION
Front LH seat belt pre-tensioner is installed on the underside of center pillar with fixed nuts.
DTC Logic
INFOID:0000000005241152
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-16, "Air Bag Warning Lamp Diagnosis"
.
NOTE:
SRS does not enter diagnosis mode if no malfunction is detected in user mode.
Is malfunctioning part detected?
YES
>> Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005241153
WARNING:
• Before servicing, turn ignition switch OFF, disconnect battery negative terminal and wait at least 3
minutes. (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?
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
B1088
PRE-TEN FRONT LH
[GND-SHORT]
Front LH seat belt pre-tensioner circuit
is shorted to ground
• Disconnection of wiring harness and
short
• Malfunction in front LH seat belt pre-
tensioner
• Malfunction in air bag diagnosis sen-
sor unit
SRC-84
< DTC/CIRCUIT DIAGNOSIS >
B1088 PRE-TEN FRONT LH
YES
>> GO TO 3.
NO
>> Replace wiring harness.
3.
REPLACE FRONT SEAT BELT PRE-TENSIONER
1.
Replace front LH seat belt pre-tensioner. Refer to
SB-6, "SEAT BELT RETRACTOR : Exploded View"
2.
Perform DTC confirmation procedure. Refer to
.
Is DTC detected?
YES
>> GO TO 4.
NO
>> INSPECTION END
4.
REPLACE AIR BAG DIAGNOSIS SENSOR UNIT
1.
Replace air bag diagnosis sensor unit. Refer to
2.
Perform DTC confirmation procedure. Refer to
.
Is DTC detected?
YES
>> GO TO 1.
NO
>> INSPECTION END
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