Nissan Titan. Manual — part 82
FRONT DOOR LOCK ASSEMBLY LH (KEY CYLINDER SWITCH)
DLK-37
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
I
J
L
M
A
B
DLK
N
O
P
Is the inspection result normal?
YES
>> Front door lock assembly LH (key cylinder switch) signal is OK.
NO
>> GO TO 2
2.
CHECK DOOR KEY CYLINDER SWITCH LH GROUND HARNESS
1. Turn ignition switch OFF.
2. Disconnect front door lock assembly LH (key cylinder switch).
3. Check continuity between front door lock assembly LH (key cyl-
inder switch) connector D14 terminal 5 and body ground.
Is the inspection result normal?
YES
>> GO TO 3
NO
>> Repair or replace harness.
3.
CHECK DOOR KEY CYLINDER SWITCH LH
Check continuity between front door lock assembly LH (key cylinder
switch) terminals.
Is the inspection result normal?
YES
>> GO TO 4
NO
>> Replace front door lock assembly LH (key cylinder switch). Refer to
4.
CHECK DOOR KEY CYLINDER HARNESS
1. Disconnect main power window and door lock/unlock switch.
Connector
Terminals
Condition
Voltage (V)
(Approx.)
(+)
(–)
D15
6
Ground
Neutral/Unlock
5
Lock
0
7
Neutral/Lock
5
Unlock
0
LIIA1256E
Connector
Terminals
Continuity
D14
5 – Ground
Yes
WIIA0755E
Terminals
Condition
Continuity
1 – 5
Key is turned to UNLOCK or neutral.
No
Key is turned to LOCK.
Yes
5 – 6
Key is turned to LOCK or neutral.
No
Key is turned to UNLOCK.
Yes
LIIA1573E
DLK-38
< DTC/CIRCUIT DIAGNOSIS >
FRONT DOOR LOCK ASSEMBLY LH (KEY CYLINDER SWITCH)
2. Check continuity between main power window and door lock/
unlock switch connector (A) D15 terminals 6, 7 and front door
lock assembly LH (key cylinder switch) connector (B) D14 termi-
nals 1, 6 and body ground.
Is the inspection result normal?
YES
>> Replace main power window and door lock/unlock switch.
NO
>> Repair or replace harness.
CREW CAB
CREW CAB : Description
INFOID:0000000009878778
The main power window and door lock/unlock switch detects condition of the door key cylinder switch and
transmits to BCM as the LOCK or UNLOCK signal.
CREW CAB : Component Function Check
INFOID:0000000009878779
1.
CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL
Check "KEY CYL LK-SW" AND "KEY CYL UN-SW" in DATA MONITOR mode for “POWER DOOR LOCK
SYSTEM” with CONSULT.
Is the inspection result normal?
YES
>> Key cylinder switch is OK.
NO
>> Refer to
DLK-38, "CREW CAB : Diagnosis Procedure"
.
CREW CAB : Diagnosis Procedure
INFOID:0000000009878780
Regarding Wiring Diagram information, refer to
DLK-84, "Wiring Diagram - Crew Cab"
.
1.
CHECK DOOR KEY CYLINDER SWITCH LH
With CONSULT
Check front door lock assembly LH (key cylinder switch) ("KEY CYL LK-SW") and ("KEY CYL UN-SW) in
DATA MONITOR mode with CONSULT. Refer to
DLK-19, "DOOR LOCK : CONSULT Function (BCM - DOOR
• When key inserted in front key cylinder is turned to LOCK:
• When key inserted in front key cylinder is turned to UNLOCK:
Connector
Terminals
Connector
Terminals
Continuity
A: Main
power win-
dow and
door lock/
unlock
switch
6
B: Front
door lock
assembly
LH (key
cylinder
switch)
1
Yes
7
6
Yes
6, 7
Ground
No
LIIA2360E
Monitor item
Condition
KEY CYL LK-SW
Lock
: ON
Neutral / Unlock
: OFF
KEY CYL UN-SW
Unlock
: ON
Neutral / Lock
: OFF
KEY CYL LK-SW
: ON
FRONT DOOR LOCK ASSEMBLY LH (KEY CYLINDER SWITCH)
DLK-39
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
I
J
L
M
A
B
DLK
N
O
P
Without CONSULT
Check voltage between main power window and door lock/unlock switch connector D7 terminals 4, 6 and
ground.
Is the inspection result normal?
YES
>> Front door lock assembly LH (key cylinder switch) signal is OK.
NO
>> GO TO 2
2.
CHECK DOOR KEY CYLINDER SWITCH LH GROUND HARNESS
1. Turn ignition switch OFF.
2. Disconnect front door lock assembly LH (key cylinder switch).
3. Check continuity between front door lock assembly LH (key cyl-
inder switch) connector D14 terminal 5 and body ground.
Is the inspection result normal?
YES
>> GO TO 3
NO
>> Repair or replace harness.
3.
CHECK DOOR KEY CYLINDER SWITCH LH
Check continuity between front door lock assembly LH (key cylinder
switch) terminals.
Is the inspection result normal?
YES
>> GO TO 4
NO
>> Replace front door lock assembly LH (key cylinder switch). Refer to
4.
CHECK DOOR KEY CYLINDER HARNESS
KEY CYL UN-SW
: ON
Connector
Terminals
Condition
Voltage (V)
(Approx.)
(+)
(–)
D7
4
Ground
Neutral/Unlock
5
Lock
0
6
Neutral/Lock
5
Unlock
0
LIIA1273E
Connector
Terminals
Continuity
D14
5 – Ground
Yes
WIIA0755E
Terminals
Condition
Continuity
1 – 5
Key is turned to UNLOCK or neutral.
No
Key is turned to LOCK.
Yes
5 – 6
Key is turned to LOCK or neutral.
No
Key is turned to UNLOCK.
Yes
LIIA1573E
DLK-40
< DTC/CIRCUIT DIAGNOSIS >
FRONT DOOR LOCK ASSEMBLY LH (KEY CYLINDER SWITCH)
1. Disconnect main power window and door lock/unlock switch.
2. Check continuity between main power window and door lock/
unlock switch connector (A) D7 terminals 4, 6 and front door
lock assembly LH (key cylinder switch) connector (B) D14 termi-
nals 1, 6 and body ground.
Is the inspection result normal?
YES
>> Replace main power window and door lock/unlock switch.
NO
>> Repair or replace harness.
Connector
Terminals
Connector
Terminals
Continuity
A: Main
power win-
dow and
door lock/
unlock
switch
4
B: Front
door lock
assembly
LH (key
cylinder
switch)
1
Yes
6
6
Yes
4, 6
Ground
No
WIIA0756E
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