Infiniti G35 (V35) Sedan. Manual — part 1220
SRC-28
< COMPONENT DIAGNOSIS >
B1017, B1020, B1021 OCCUPANT SENS C/U
B1017, B1020, B1021 OCCUPANT SENS C/U
Description
INFOID:0000000000959606
DTC B1017, B1020, B1021 [UNIT FAIL] OCCUPANT SENS C/U
Suppresses the deployment of passenger air bag when the condition of passenger seat is empty, child and
child-seat. And turn on cut-off telltale lamp when the condition of passenger seat is child-seat and child. In
case of malfunction the blinking of the SRS air bag warning lamp tells the trouble to driver and by the on board
self-diagnosis system or electro diagnosis tester CONSULT-lll can detects the cause.
OPERATION
This unit classifies occupant on a passenger seat and detects electrical trouble in Occupant Classification
System, and transmits trouble information to air bag control unit.
STRUCTURE
It is integrated into the seat sensor mat and detects the occupants with Occupant Classification System (OCS)
control unit that classifies the occupants.
INSTALLATION
Occupant Classification System (OCS) control unit is installed in the passenger seat cushion.
DTC Logic
INFOID:0000000000959607
DTC DETECTION LOGIC
With CONSULT-lll
DTC No. Index (“SELF-DIAG [CURRENT]”), (“SELF-DIAG [PAST]” or “TROUBLE DIAG RECORD”)
Without CONSULT-lll
Warning Lamp Flash Code Chart
DTC CONFIRMATION PROCEDURE (With CONSULT-lll)
1.
IGNITION SWITCH
Turn ignition switch ON.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
B1017
B1020
B1021
OCCUPANT SENS C/U
[UNIT FAIL]
Trouble occurs in OCS-C/U.
1.
Visually check the wiring harness
connection.
2.
Replace the harness if it has visi-
ble damage.
3.
Replace front passenger seat
cushion and occupant classifica-
tion system control unit as an as-
sembly.
4.
Replace diagnosis sensor unit
(ACU).
JMHIA0045GB
B1017, B1020, B1021 OCCUPANT SENS C/U
SRC-29
< COMPONENT DIAGNOSIS >
C
D
E
F
G
I
J
K
L
M
A
B
SRC
N
O
P
>> GO TO 2.
2.
CONSULT-LLL
Select “DIAG MODE” with CONSULT-lll.
>> GO TO 3.
3.
DTC CODE
If DTC is detected. Refer to
>> END
DTC CONFIRMATION PROCEDURE (Without CONSULT-lll)
NOTE:
• SRS will not enter diagnosis mode if no malfunction is detected in user mode.
1.
IGNITION SWITCH
Turn ignition switch ON.
>> GO TO 2.
2.
USER MODE-DIAG MODE
After air bag warning lamp illuminates for 7 seconds, turn ignition switch OFF within 1 second.
>> GO TO 3.
3.
USER MODE-DIAG MODE
Wait more than 3 seconds.
>> GO TO 4.
4.
USER MODE-DIAG MODE
Repeat step 1 to 3 twice. (Perform three times in all.)
>> GO TO 5.
5.
DIAG MODE
Turn ignition switch ON. (SRS is now in diagnosis mode.)
>> GO TO 6.
6.
DIAG MODE (AIR BAG WARNING LAMP)
Malfunctioning portion is indicated according to blinking times of air bag warning lamp. Refer to
SRC-30
< COMPONENT DIAGNOSIS >
B1017, B1020, B1021 OCCUPANT SENS C/U
>> END
Diagnosis Procedure (Component diagnosis)
INFOID:0000000000959608
With CONSULTlll
CAUTION:
• 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 harness connector.
Are connections of harness connectors and terminals correct?
YES
>> GO TO 2.
NO
>> Repair or replace harness connectors.
2.
CHECK WIRING HARNESS
Check the wiring harness.
Is the outside of wiring harness normal, without any damage?
YES
>> GO TO 3.
NO
>> Replace wiring harness.
3.
CHECK OCCUPANT SENSOR C/U
Check the displayed on CONSULT-lll?
Is “OCCUPANT SENSOR C/U” displayed on CONSULT-lll?
YES
>> Replace passenger side seat cushion assembly.
>> INSPECTION END.
B1018 OCCUPANT SENS
SRC-31
< COMPONENT DIAGNOSIS >
C
D
E
F
G
I
J
K
L
M
A
B
SRC
N
O
P
B1018 OCCUPANT SENS
Description
INFOID:0000000000959609
DTC B1018 [UNIT FAIL] OCCUPANT SENS
Suppresses the deployment of passenger air bag when the condition of passenger seat is empty, child and
child-seat. And turn on cut-off telltale lamp when the condition of passenger seat is child-seat and child. In
case of malfunction the blinking of the SRS air bag warning lamp tells the trouble to driver and by the on board
self-diagnosis system or electro diagnosis tester CONSULT-lll can detects the cause.
OPERATION
The unit classifies occupant on a passenger seat and transmits it to Occupant Classification System (OCS)
control unit.
STRUCTURE
Plural sensors are installed in the sensor mat to prevent wrong sensing induced by the sitting position.
INSTALLATION
Seat sensor mat is installed in the passenger seat cushion.
DTC Logic
INFOID:0000000000959610
DTC DETECTION LOGIC
With CONSULT-lll
DTC No. Index (“SELF-DIAG [CURRENT]”), (“SELF-DIAG [PAST]” or “TROUBLE DIAG RECORD”)
Without CONSULT-lll
Warning Lamp Flash Code Chart
DTC CONFIRMATION PROCEDURE (With CONSULT-lll)
1.
IGNITION SWITCH
Turn ignition switch ON.
>> GO TO 2.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
B1018
OCCUPANT SENS
[UNIT FAIL]
Trouble occurs in OCS – SENS.
1.
Visually check the wiring harness
connection.
2.
Replace the harness if it has visi-
ble damage.
3.
Replace front passenger seat
cushion and occupant classifica-
tion system control unit as an as-
sembly.
4.
Replace diagnosis sensor unit
(ACU).
JMHIA0045GB
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