Nissan Frontier. Manual - part 249

DLK-42

< DTC/CIRCUIT DIAGNOSIS >

KEY SWITCH (BCM INPUT)

KEY SWITCH (BCM INPUT)

Diagnosis Procedure

INFOID:0000000009478897

Regarding Wiring Diagram information, refer to 

DLK-77, "Wiring Diagram - King Cab"

 or 

DLK-87, "Wiring Dia-

gram - Crew Cab"

.

1.

CHECK KEY SWITCH INPUT SIGNAL

With CONSULT

Check key switch "KEY ON SW" in DATA MONITOR mode with CONSULT. Refer to 

BCS-15, "DOOR LOCK :

CONSULT Function (BCM - DOOR LOCK)"

.

• When key is inserted to ignition key cylinder:

• When key is removed from ignition key cylinder:

Without CONSULT

Check voltage between BCM connector M18 terminal 37 and

ground.

Is the inspection result normal?

YES

>> Key switch (insert) circuit is OK.

NO

>> GO TO 2

2.

CHECK KEY SWITCH (INSERT)

1. Turn ignition switch OFF.

2. Disconnect key switch connector.

3. Check continuity between key switch terminals.

Is the inspection result normal?

YES

>> Repair or replace harness or fuse.

NO

>> Replace key switch.

KEY ON SW

: ON

KEY ON SW

: OFF

Connector

Terminal

Condition

Voltage (V)

(+)

(–)

M18

37

Ground

Key is inserted.

Battery voltage

Key is removed.

0

LIIA0567E

Terminals

Condition

Continuity

1 – 2

Key is inserted.

Yes

Key is removed.

No

WIIA0559E

DOOR LOCK ACTUATOR

DLK-43

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

DOOR LOCK ACTUATOR

DRIVER SIDE
DRIVER SIDE : Description

INFOID:0000000009478898

Locks/unlocks the door with the signal from BCM.

DRIVER SIDE : Component Function Check

INFOID:0000000009478899

1.

CHECK FUNCTION

1. Use CONSULT to perform Active Test "DOOR LOCK".

2. Touch “ALL LCK” or “ALL ULK” to check that it works normally.
Is the inspection result normal?

YES

>> Door lock actuator is OK.

NO

>> Refer to 

DLK-43, "DRIVER SIDE : Diagnosis Procedure"

.

DRIVER SIDE : Diagnosis Procedure

INFOID:0000000009478900

Regarding Wiring Diagram information, refer to 

DLK-77, "Wiring Diagram - King Cab"

 or 

DLK-87, "Wiring Dia-

gram - Crew Cab"

.

1.

CHECK DOOR LOCK ACTUATOR SIGNAL

1. Turn ignition switch OFF.

2. Check voltage between BCM connector M20 terminals 59, 65

and ground.

Is the inspection result normal?

YES

>> GO TO 2

NO

>> GO TO 3

2.

CHECK DOOR LOCK ACTUATOR HARNESS

1. Disconnect BCM and front door lock assembly LH (actuator).

2. Check continuity between BCM connector (A) M20 terminals 59,

65 and front door lock assembly LH (actuator) connector (B)

D14 terminals 1, 2. 

Is the inspection result normal?

YES

>> Replace front door lock assembly LH (actuator).

Connector

Terminals

Condition

Voltage (V)

(Approx.)

(+)

(-)

M20

59

Ground

Driver door lock/unlock 
switch is turned to UN-
LOCK

0 

→ Battery voltage

65

Driver door lock/unlock 
switch is turned to LOCK

0 

→ Battery voltage

LIIA1046E

Connector

Terminals

Connector

Terminals

Continuity

M20

59

D14

2

Yes

65

1

ALKIA1191ZZ

DLK-44

< DTC/CIRCUIT DIAGNOSIS >

DOOR LOCK ACTUATOR

NO

>> Repair or replace harness.

3.

CHECK DOOR LOCK ACTUATOR HARNESS

1. Disconnect BCM and front door lock assembly LH (actuator).

2. Check continuity between BCM connector M20 terminals 59, 65

and ground.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-49, "Removal and Installation"

.

NO

>> Repair or replace harness.

PASSENGER SIDE
PASSENGER SIDE : Description

INFOID:0000000009478901

Locks/unlocks the door with the signal from BCM.

PASSENGER SIDE : Component Function Check

INFOID:0000000009478902

1.

CHECK FUNCTION

1. Use CONSULT to perform Active Test "DOOR LOCK".

2. Touch “ALL LCK” or “ALL ULK” to check that it works normally.
Is the inspection result normal?

YES

>> Door lock actuator is OK.

NO

>> Refer to 

DLK-44, "PASSENGER SIDE : Diagnosis Procedure"

.

PASSENGER SIDE : Diagnosis Procedure

INFOID:0000000009478903

Regarding Wiring Diagram information, refer to 

DLK-77, "Wiring Diagram - King Cab"

 or 

DLK-87, "Wiring Dia-

gram - Crew Cab"

.

1.

CHECK FRONT DOOR LOCK ACTUATOR RH SIGNAL

1. Turn ignition switch OFF.

2. Check voltage between BCM connector M20 terminals 65, 66

and ground.

Is the inspection result normal?

YES

>> GO TO 2

Connector

Terminals

Continuity

M20

59

Ground

No

65

ALKIA0633ZZ

Connector

Terminals

Condition

Voltage (V)

(Approx.)

(+)

(-)

M20

65

Ground

Door lock/unlock switch is 
turned to LOCK

0 

→ Battery voltage 

for 300 ms

66

Door lock/unlock switch is 
turned to UNLOCK

LIIA1048E

DOOR LOCK ACTUATOR

DLK-45

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

NO

>> GO TO 3

2.

CHECK DOOR LOCK ACTUATOR HARNESS

1. Disconnect BCM and front door lock actuator RH.

2. Check continuity between BCM connector (A) M20 terminals 65,

66 and front door lock actuator RH (B) D114 terminals 1, 2.

Is the inspection result normal?

YES

>> Replace front door lock actuator RH. Refer to 

DLK-137, "Removal and Installation"

.

NO

>> Repair or replace harness.

3.

CHECK DOOR LOCK ACTUATOR HARNESS

1. Disconnect BCM and front door lock actuator RH.

2. Check continuity between BCM connector M19 terminals 65, 66

and ground.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-49, "Removal and Installation"

.

NO

>> Repair or replace harness.

REAR LH
REAR LH : Description

INFOID:0000000009478904

Locks/unlocks the door with the signal from BCM.

REAR LH : Component Function Check

INFOID:0000000009478905

1.

CHECK FUNCTION

1. Use CONSULT to perform Active Test "DOOR LOCK".

2. Touch “ALL LCK” or “ALL ULK” to check that it works normally.
Is the inspection result normal?

YES

>> Door lock actuator is OK.

NO

>> Refer to 

DLK-45, "REAR LH : Diagnosis Procedure"

.

REAR LH : Diagnosis Procedure

INFOID:0000000009478906

Regarding Wiring Diagram information, refer to 

DLK-87, "Wiring Diagram - Crew Cab"

.

Terminal

Continuity

65

2

Yes

66

1

ALKIA1192ZZ

Terminals

Continuity

65

Ground

No

66

ALKIA0631ZZ