Nissan March K13. Manual — part 622
B1042, B1043, B1044, B1045, B1046, B1047 DIAGNOSIS SENSOR UNIT
SRC-27
< DTC/CIRCUIT DIAGNOSIS >
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B1042, B1043, B1044, B1045, B1046, B1047 DIAGNOSIS SENSOR UNIT
Description
INFOID:0000000006055198
• It detects a shock that is more than the specified level and monitors whether the driver air bag operates nor-
mally.
• It contains the “G” sensor for frontal collisions and spare battery function in case of main battery damage in
collision.
DTC Logic
INFOID:0000000005987889
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:0000000005987890
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 connectors.
2.
CHECK WIRING HARNESS
Check the wiring harness externals.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace wiring harness.
3.
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
.
DTC
Display contents of
CONSULT-III
DTC detecting condition
Possible cause
B1042
B1043
B1044
B1045
B1046
B1047
CONTROL UNIT
Air bag diagnosis sensor unit is malfunctioning
Malfunction in air bag diagnosis sensor unit
SRC-28
< DTC/CIRCUIT DIAGNOSIS >
B1042, B1043, B1044, B1045, B1046, B1047 DIAGNOSIS SENSOR UNIT
Is DTC detected?
YES
>> GO TO 1.
NO
>> INSPECTION END
B1049 DRIVER AIRBAG MODULE
SRC-29
< DTC/CIRCUIT DIAGNOSIS >
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B1049 DRIVER AIRBAG MODULE
Description
INFOID:0000000005987891
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:0000000005987892
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:0000000005987893
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
B1049
B1054
DRIVER AIRBAG
MODULE
[OPEN]
Driver air bag module circuit is open
(including the spiral cable)
• Disconnection of wiring harness and open
• Malfunction in driver air bag module
• Malfunction in spiral cable
• Malfunction in air bag diagnosis sensor unit
SRC-30
< DTC/CIRCUIT DIAGNOSIS >
B1049 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
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Driver side air bag module
Ground
Continuity
Connector
Terminal
M350
10
Not existed
11
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