Nissan Titan. Instruction — part 81
DOOR LOCK AND UNLOCK SWITCH
DLK-33
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
I
J
L
M
A
B
DLK
N
O
P
CREW CAB : Diagnosis Procedure
INFOID:0000000009878774
Regarding Wiring Diagram information, refer to
DLK-84, "Wiring Diagram - Crew Cab"
.
1.
CHECK DOOR LOCK/UNLOCK SWITCH INPUT SIGNAL
With CONSULT
Check door lock/unlock switch ("CDL LOCK SW", "CDL UNLOCK SW") in DATA MONITOR mode in CON-
SULT. Refer to
DLK-19, "DOOR LOCK : CONSULT Function (BCM - DOOR LOCK)"
.
• When door lock/unlock switch is turned to LOCK:
• When door lock/unlock switch is turned to UNLOCK:
Without CONSULT
1. Remove key from ignition key cylinder.
2. Check the signal between BCM connector M18 terminal 22 and ground with oscilloscope when door lock/
unlock switch is turned to LOCK or UNLOCK.
3. Make sure the signals which are shown in the figure below can be detected during 10 seconds just after
the door lock/unlock switch is turned to LOCK or UNLOCK.
Is the inspection result normal?
YES
>> Door lock and unlock switch circuit is OK.
NO
>> GO TO 2
2.
CHECK BCM OUTPUT SIGNAL
1. Turn ignition switch OFF.
2. Using the vehicle operational key fob, press and hold the UNLOCK button for more than 3 seconds.
Is the inspection result normal?
YES
>> GO TO 3
NO
>> Replace BCM. Refer to
BCS-52, "Removal and Installation"
3.
CHECK DOOR LOCK/UNLOCK SWITCH GROUND HARNESS
1. Turn ignition switch OFF.
2. Disconnect main power window and door lock/unlock switch or power window and door lock/unlock switch
RH.
CDL LOCK SW
:ON
CDL UNLOCK SW
:ON
Connector
Terminals
Signal
(Reference value)
(+)
(–)
M18
22
Ground
PIIA6379E
PIIA1297E
The front windows should be lowered?
DLK-34
< DTC/CIRCUIT DIAGNOSIS >
DOOR LOCK AND UNLOCK SWITCH
3. Check continuity between main power window and door lock/
unlock switch connector D8 terminal 17 and ground.
4. Check continuity between power window and door lock/unlock
switch RH connector D105 terminal 11 and ground.
Is the inspection result normal?
YES
>> GO TO 4
NO
>> Repair or replace harness.
4.
CHECK POWER WINDOW SERIAL LINK CIRCUIT
1. Disconnect BCM.
2. Check continuity between BCM connector M18 terminal 22 and
main power window and door lock/unlock switch connector D7
terminal 14.
3. Check continuity between BCM connector M18 terminal 22 and
power window and door lock/unlock switch RH connector D105
terminal 16.
17 - Ground
: Continuity should exist
LIIA0392E
11 - Ground
: Continuity should exist
LIIA1140E
22 - 14
: Continuity should exist
LIIA0394E
22 - 16
: Continuity should exist
WIIA0598E
DOOR LOCK AND UNLOCK SWITCH
DLK-35
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
I
J
L
M
A
B
DLK
N
O
P
4. Check continuity between BCM connector M18 terminal 22 and
ground.
Is the inspection result normal?
YES
>> Replace main power window and door lock/unlock
switch or power window and door lock/unlock switch
RH.
NO
>> Repair or replace harness.
22 - Ground
: Continuity should not exist
LIIA2359E
DLK-36
< DTC/CIRCUIT DIAGNOSIS >
FRONT DOOR LOCK ASSEMBLY LH (KEY CYLINDER SWITCH)
FRONT DOOR LOCK ASSEMBLY LH (KEY CYLINDER SWITCH)
KING CAB
KING CAB : Description
INFOID:0000000009878775
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.
KING CAB : Component Function Check
INFOID:0000000009878776
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-36, "KING CAB : Diagnosis Procedure"
.
KING CAB : Diagnosis Procedure
INFOID:0000000009878777
Regarding Wiring Diagram information, refer to
DLK-76, "Wiring Diagram - King 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:
Without CONSULT
Check voltage between main power window and door lock/unlock switch connector D15 terminals 6, 7 and
ground.
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
KEY CYL UN-SW
: ON
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