Nissan Cube. Instruction — part 879
B1017, B1020, B1021 OCCUPANT SYSTEM CONTROL UNIT
SRC-33
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
I
J
K
L
M
A
B
SRC
N
O
P
NO
>> INSPECTION END
4.
REPLACE OCCUPANT DETECTION SYSTEM SEAT SENSOR
1.
Replace passenger seat cushion frame. Refer to
.
2.
Perform DTC confirmation procedure. Refer to
.
Is DTC detected?
YES
>> GO TO 5.
NO
>> INSPECTION END
5.
REPLACE AIR BAG DIAGNOSIS SENSOR UNIT
1.
Replace air bag diagnosis sensor unit. Refer to
SR-26, "Removal and Installation"
2.
Perform DTC confirmation procedure. Refer to
.
Is DTC detected?
YES
>> GO TO 1.
NO
>> INSPECTION END
SRC-34
< DTC/CIRCUIT DIAGNOSIS >
B1018 OCCUPANT SYSTEM SENSOR
B1018 OCCUPANT SYSTEM SENSOR
Description
INFOID:0000000009946109
Occupant Detection System sensor detects occupant in passenger seat and transmits it to Occupant Detec-
tion System control unit.
DTC Logic
INFOID:0000000009946110
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
CHECK SELF-DIAG RESULT
With CONSULT
1.
Turn ignition switch ON.
2.
Perform “AIR BAG” Self Diagnostic Result with CONSULT.
Without CONSULT
1.
Turn ignition switch ON.
2.
Check the air bag warning lamp status. Refer to
SRC-18, "Diagnosis with Air Bag Warning Lamp"
.
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:0000000009946111
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.
DIAGNOSTIC PROCEDURE
1.
CHECK HARNESS CONNECTOR
Check the connection of 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 OCCUPANT DETECTION SYSTEM CONTROL UNIT
1.
Replace occupant detection system control unit. Refer to
SR-29, "Removal and Installation"
2.
Perform DTC confirmation procedure. Refer to
.
Is DTC detected?
YES
>> GO TO 4.
DTC
Display contents of
CONSULT
DTC detecting condition
Possible cause
B1018
OCCUPANT SENS
[UNIT FAIL]
Occupant Detection System sen-
sor is malfunctioning
• Disconnection of wiring harness
• Malfunction in Occupant Detection System sensor
• Malfunction in Occupant Detection System control unit
• Malfunction in air bag diagnosis sensor unit
B1018 OCCUPANT SYSTEM SENSOR
SRC-35
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
I
J
K
L
M
A
B
SRC
N
O
P
NO
>> INSPECTION END
4.
REPLACE OCCUPANT DETECTION SYSTEM SEAT SENSOR
1.
Replace passenger seat cushion frame. Refer to
.
2.
Perform DTC confirmation procedure. Refer to
.
Is DTC detected?
YES
>> GO TO 5.
NO
>> INSPECTION END
5.
REPLACE AIR BAG DIAGNOSIS SENSOR UNIT
1.
Replace air bag diagnosis sensor unit. Refer to
SR-26, "Removal and Installation"
2.
Perform DTC confirmation procedure. Refer to
.
Is DTC detected?
YES
>> GO TO 1.
NO
>> INSPECTION END
SRC-36
< DTC/CIRCUIT DIAGNOSIS >
B1022 OCCUPANT SYSTEM CONTROL UNIT
B1022 OCCUPANT SYSTEM CONTROL UNIT
Description
INFOID:0000000009946112
This unit classifies occupant in passenger seat and detects electrical malfunctions in Occupant Detection Sys-
tem, and transmits malfunction information to air bag diagnosis sensor unit.
DTC Logic
INFOID:0000000009946113
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
CHECK SELF-DIAG RESULT
With CONSULT
1.
Turn ignition switch ON.
2.
Perform “AIR BAG” Self Diagnostic Result with CONSULT.
Without CONSULT
1.
Turn ignition switch ON.
2.
Check the air bag warning lamp status. Refer to
SRC-18, "Diagnosis with Air Bag Warning Lamp"
.
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:0000000009946114
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.
DIAGNOSTIC PROCEDURE
1.
CHECK HARNESS CONNECTOR
Check the connection of 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 OCCUPANT DETECTION SYSTEM CONTROL UNIT
1.
Replace occupant detection system control unit. Refer to
SR-29, "Removal and Installation"
2.
Perform DTC confirmation procedure. Refer to
.
DTC
Display contents of
CONSULT
DTC detecting condition
Possible cause
B1022
OCCUPANT SENS C/U
[COMM FAIL]
• Internal malfunction of Occupant Detec-
tion System control unit
• Malfunction of circuit between Occupant
Detection System control unit and Air
bag diagnosis sensor unit
• Malfunction of Air bag diagnosis sensor
unit
• Disconnection of wiring harness
• Malfunction in Occupant Detection System con-
trol unit
• Malfunction in air bag diagnosis sensor unit
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