Nissan Quest E52. Instruction — part 1135
B1051, B1056 DRIVER AIR BAG MODULE
SRC-69
< DTC/CIRCUIT DIAGNOSIS >
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SRC
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B1051, B1056 DRIVER AIR BAG MODULE
DTC Logic
INFOID:0000000009649887
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
CHECK SELF-DIAG RESULT
With CONSULT
1.
Turn ignition switch ON.
2.
Perform “Self Diagnostic Result” mode of “AIR BAG” using CONSULT.
Without CONSULT
1.
Turn ignition switch ON.
2.
Check the air bag warning lamp status. Refer to
SRC-15, "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:0000000009649888
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 harness connector and combination switch (spiral cable) harness con-
nector.
3.
Check continuity between driver air bag module harness connector and combination switch (spiral cable)
harness connector.
DTC
Display contents of
CONSULT
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)
• Harness or connectors
(The module circuit is shorted.)
• Malfunction in driver air bag module
• Malfunction in spiral cable
• Malfunction in air bag diagnosis sensor unit
SRC-70
< DTC/CIRCUIT DIAGNOSIS >
B1051, B1056 DRIVER AIR BAG 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-15, "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-12, "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
M301
10
M32
28
Existed
11
30
M300
12
29
9
30
Driver side air bag module
Ground
Continuity
Connector
Terminal
M301
10
Not existed
11
M300
12
9
B1052, B1057 DRIVER AIR BAG MODULE
SRC-71
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
I
J
K
L
M
A
B
SRC
N
O
P
B1052, B1057 DRIVER AIR BAG MODULE
DTC Logic
INFOID:0000000009649889
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
CHECK SELF-DIAG RESULT
With CONSULT
1.
Turn ignition switch ON.
2.
Perform “Self Diagnostic Result” mode of “AIR BAG” using CONSULT.
Without CONSULT
1.
Turn ignition switch ON.
2.
Check the air bag warning lamp status. Refer to
SRC-15, "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:0000000009649890
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-I
1.
Turn ignition switch OFF.
2.
Disconnect driver air bag module harness connector and combination switch (spiral cable) harness con-
nector.
3.
Check continuity between combination switch (spiral cable) terminals.
DTC
Display contents of
CONSULT
DTC detecting condition
Possible cause
B1052
B1057
DRIVER AIRBAG
MODULE
[SHORT]
Driver air bag module circuit are shorted to each
other
(including the spiral cable)
• Harness or connectors
(The module circuit is shorted.)
• Malfunction in driver air bag module
• Malfunction in spiral cable
• Malfunction in air bag diagnosis sensor unit
SRC-72
< DTC/CIRCUIT DIAGNOSIS >
B1052, B1057 DRIVER AIR BAG MODULE
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace combination switch (spiral cable). Refer to
SR-15, "Removal and Installation"
.
4.
CHECK SPIRAL CABLE CIRCUIT-II
Check continuity between combination switch (spiral cable) terminals.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace combination switch (spiral cable). Refer to
SR-15, "Removal and Installation"
.
5.
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 6.
NO
>> INSPECTION END
6.
REPLACE DRIVER AIR BAG MODULE
1.
Replace driver air bag module. Refer to
SR-12, "Removal and Installation"
.
2.
Perform DTC confirmation procedure. Refer to
.
Is DTC detected?
YES
>> GO TO 1.
NO
>> INSPECTION END
Combination switch (spiral cable)
Continuity
Connector
Terminal
Connector
Terminal
M301
10
M301
11
Not existed
M300
9
12
Combination switch (spiral cable)
Continuity
Connector
Terminal
Terminal
M32
28
29
Not existed
30
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