Nissan Sentra. Instruction — part 923
WCS
SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT
WCS-29
< DTC/CIRCUIT DIAGNOSIS >
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SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT
Description
INFOID:0000000009759247
Transmits a seat belt buckle switch LH (driver seat) signal to the combination meter.
Component Function Check
INFOID:0000000009759248
1.
CHECK COMBINATION METER INPUT SIGNAL
Select DATA MONITOR for METER/M&A and check the BUCKLE SW monitor value.
YES
>> Inspection End.
NO
>> Refer to
Diagnosis Procedure
INFOID:0000000009759249
Regarding Wiring Diagram information, refer to
.
1.
CHECK COMBINATION METER INPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between combination meter harness connector M24 terminal 9 and ground.
Is the inspection result normal?
YES
>> Replace combination meter. Refer to
MWI-77, "Removal and Installation"
NO
>> GO TO 2.
2.
CHECK SEAT BELT BUCKLE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect combination meter harness connector M24 and seat belt buckle switch LH (driver seat) har-
ness connector B16.
3. Check continuity between combination meter harness connector M24 terminal 9 and seat belt buckle
switch LH (driver seat) harness connector B16 terminal 1.
4. Check continuity between combination meter harness connector M24 terminal 9 and ground.
Is the inspection result normal?
Monitor Item
Condition
Status
BUCKLE SW
When seat belt LH (driver seat) is fastened
OFF
When seat belt LH (driver seat) is unfastened
ON
Combination meter
Ground
Condition
Voltage
(Approx.)
Connector
Terminal
M24
9
—
When driver seat belt is fastened
12 V
When driver seat belt is unfastened
0 V
Combination meter
Seat belt buckle switch LH (driver seat)
Continuity
Connector
Terminal
Connector
Terminal
M24
9
B16
1
Yes
Combination meter
Ground
Continuity
Connector
Terminal
M24
9
—
No
WCS-30
< DTC/CIRCUIT DIAGNOSIS >
SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT
YES
>> GO TO 3.
NO
>> Repair or replace harness or connector.
3.
CHECK SEAT BELT BUCKLE SWITCH GROUND CIRCUIT
Check continuity between seat belt buckle switch LH (driver seat) harness connector B16 terminal 2 and
ground.
Is the inspection result normal?
YES
>> Check the seat belt buckle switch. Refer to
WCS-30, "Component Inspection"
NO
>> Repair or replace harness or connector.
Component Inspection
INFOID:0000000009759250
1.
CHECK SEAT BELT BUCKLE SWITCH
1. Turn ignition switch OFF.
2. Disconnect the seat belt buckle switch LH (driver seat).
3. Check continuity between the seat belt buckle switch LH (driver seat) terminals 1 and 2.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace the seat belt buckle switch LH (driver seat). Refer to
SR-32, "Removal and Installation"
.
Seat belt buckle switch LH (driver seat)
Ground
Continuity
Connector
Terminal
B16
2
—
Yes
Terminal
Condition
Continuity
1
2
When seat belt is fastened
No
When seat belt is unfastened
Yes
WCS
WARNING CHIME SYSTEM SYMPTOMS
WCS-31
< SYMPTOM DIAGNOSIS >
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SYMPTOM DIAGNOSIS
WARNING CHIME SYSTEM SYMPTOMS
Symptom Table
INFOID:0000000009759251
CAUTION:
Perform the self-diagnosis with CONSULT before the symptom diagnosis. Perform the trouble diagno-
sis if any DTC is detected.
Symptom
Possible cause
Reference
The light reminder warning does not sound.
• Harness between BCM and front door
switch LH
• Front door switch LH
• BCM
• Combination meter
.
The parking brake release warning continues sounding or
does not sound.
• Harness between combination meter and
parking brake switch
• Parking brake switch
• BCM
• Combination meter
.
The seat belt warning continues sounding or does not sound.
• Harness between combination meter and
seat belt buckle switch (LH)
• Seat belt buckle switch (LH)
• BCM
• Combination meter
.
The key warning does not sound.
(without Intelligent Key)
• Harness between BCM and key switch
• Key switch
• BCM
.
Warning chime does not sound at all.
• BCM
• Combination meter
.
WCS-32
< SYMPTOM DIAGNOSIS >
THE PARKING BRAKE RELEASE WARNING CONTINUES SOUNDING, OR
DOES NOT SOUND
THE PARKING BRAKE RELEASE WARNING CONTINUES SOUNDING, OR
DOES NOT SOUND
Description
INFOID:0000000009759252
• The parking brake warning buzzer sounds continuously during vehicle travel though the parking brake is
released.
• The parking brake warning buzzer does not sound at all even though driving the vehicle with the parking
brake applied.
Diagnosis Procedure
INFOID:0000000009759253
1.
CHECK PARKING BRAKE WARNING LAMP
1. Start the engine.
2. Check the operation of the brake warning lamp by operating the parking brake.
Is the inspection result normal?
YES
>> Replace combination meter. Refer to
MWI-77, "Removal and Installation"
NO
>> GO TO 2.
2.
CHECK PARKING BRAKE SWITCH SIGNAL CIRCUIT
Check the parking brake switch signal circuit. Refer to
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace harness or connector.
3.
CHECK PARKING BRAKE SWITCH
Check the parking brake switch. Refer to
MWI-61, "Component Inspection"
.
Is the inspection result normal?
YES
>> Replace combination meter. Refer to
MWI-77, "Removal and Installation"
NO
>> Replace parking brake switch. Refer to
.
Combination meter
Condition
Status
Brake warning lamp
When parking brake is applied
ON
When parking brake is released
OFF
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