Nissan Frontier D40. Instruction — part 1132
WCS-20
< COMPONENT DIAGNOSIS >
SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT
Check continuity between seat belt buckle switch LH harness con-
nector B12 terminal 2 and ground.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Repair or replace harness.
Component Inspection
INFOID:0000000005274832
1.
CHECK SEAT BELT BUCKLE SWITCH
1.
Turn ignition switch OFF.
2.
Disconnect the seat belt buckle switch LH connector.
3.
Check continuity between terminals 1 and 2.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace the seat belt buckle switch LH.
2 - Ground
: Continuity should exist.
AWNIA0087ZZ
1– 2
When seat belt is
fastened
: Continuity should not exist.
When seat belt is
unfastened
: Continuity should exist.
WKIA1143E
WCS
KEY SWITCH SIGNAL CIRCUIT
WCS-21
< COMPONENT DIAGNOSIS >
C
D
E
F
G
H
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L
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B
A
O
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KEY SWITCH SIGNAL CIRCUIT
Description
INFOID:0000000005274833
Transmits a key switch signal to the BCM.
Component Function Check
INFOID:0000000005274834
1.
CHECK BCM INPUT SIGNAL
Select “DATA MONITOR” for “BCM” and check the “KEY ON SW” monitor value.
>> Inspection End.
Diagnosis Procedure
INFOID:0000000005274835
Regarding Wiring Diagram information, refer to
.
1.
CHECK FUSE
Check if the key switch 10A fuse [No. 25, located in the fuse block (J/B)] is blown.
Is the fuse blown?
YES
>> Replace the blown fuse after repairing the affected circuit.
NO
>> GO TO 2
2.
CHECK BCM INPUT SIGNAL
Check voltage between BCM harness connector and ground.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> GO TO 3
3.
CHECK KEY SWITCH CIRCUIT
1.
Disconnect BCM and key switch.
2.
Check continuity between BCM harness connector M18 (A) and
key switch harness connector M27 (B).
3.
Check continuity between BCM harness connector M18 (A) and
ground.
KEY ON SW
When key is inserted into key cylinder
: ON
When key is removed from key cylinder
: OFF
Terminals
Condition
Voltage
(Approx.)
(+)
(
−
)
BCM
connector
Terminal
M18
37
Ground
Key is inserted
Battery voltage
Key is removed
0
PKIC0721E
A
B
Continuity
Connector
Terminal
Connector
Terminal
M18
37
M27
1
Yes
WKIA4102E
WCS-22
< COMPONENT DIAGNOSIS >
KEY SWITCH SIGNAL CIRCUIT
Is the inspection result normal?
YES
>> GO TO 4
NO
>> Repair or replace harness.
4.
CHECK KEY SWITCH POWER SUPPLY CIRCUIT
Check voltage between key switch harness connector and ground.
Is the inspection result normal?
YES
>> Replace key switch.
NO
>> Repair or replace harness.
Component Inspection
INFOID:0000000005274836
1.
CHECK KEY SWITCH
1.
Turn ignition switch OFF.
2.
Disconnect key switch.
3.
Check continuity between key switch terminals 1 and 2.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace key switch.
A
Ground
Continuity
Connector
Terminal
M18
37
No
Terminals
Voltage
(Approx.)
(+)
(
−
)
Key switch
Terminal
M27
3
Ground
Battery voltage
WKIA4103E
1 – 2
When key is inserted
into key cylinder
: Continuity should exist.
When key is removed
from key cylinder
: Continuity should not exist.
WKIA4101E
WCS
WARNING CHIME SYSTEM
WCS-23
< COMPONENT DIAGNOSIS >
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
WARNING CHIME SYSTEM
Wiring Diagram
INFOID:0000000005274837
ABNWA0547GB
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