Nissan Sentra. Manual - part 286

DLK-260

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

KEY CYLINDER SWITCH

KEY CYLINDER SWITCH

Description

INFOID:0000000009756568

When the mechanical key is inserted and turned into the front door lock key cylinder switch LH, the switch

transmits the LOCK or UNLOCK signal directly to the BCM. 

Component Function Check

INFOID:0000000009756569

1.

CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL

Check KEY CYL UN-SW, KEY CYL UN-SW in “DATA MONITOR” mode for “POWER DOOR LOCK SYSTEM”

with CONSULT. Refer to 

DLK-221, "DOOR LOCK : CONSULT Function (BCM - DOOR LOCK)"

.

Is the inspection result normal?

YES

>> Key cylinder switch is OK.

NO

>> Refer to 

DLK-260, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009756570

Regarding Wiring Diagram information, refer to 

DLK-233, "Wiring Diagram"

.

1.

CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL

1. Turn ignition switch ON.

2. Check voltage between BCM connector and ground.

Is the inspection result normal?

YES

>> Front door lock key cylinder switch LH is OK.

NO

>> GO TO 2

2.

CHECK DOOR KEY CYLINDER SWITCH GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect front door lock key cylinder switch LH connector.

3. Check continuity between front door lock key cylinder switch LH connector and ground.

Is the inspection result normal?

Monitor item

Condition

KEY CYL LK-SW

Lock

: ON

Neutral / Unlock

: OFF

KEY CYL UN-SW

Unlock

: ON

Neutral / Lock

: OFF

Terminals

Key position

Voltage (V)

(Approx.)

(+)

(–)

BCM connector

Terminal 

M21

8

Ground

Lock

0

Neutral / Unlock

5

7

Unlock

0

Neutral / Lock

5

Front door lock key cylinder 

switch LH connector

Terminal

Ground

Continuity 

D9

4

Yes

KEY CYLINDER SWITCH

DLK-261

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

YES

>> GO TO 3

NO

>> Repair or replace harness.

3.

CHECK DOOR KEY CYLINDER SIGNAL CIRCUIT

1. Disconnect BCM connector M21.

2. Check continuity between front door lock key cylinder switch LH connector and BCM connector M21.

3. Check continuity between front door lock key cylinder switch LH connector and ground.

Is the inspection result normal?

YES

>> GO TO 4

NO

>> Repair or replace harness.

4.

CHECK DOOR KEY CYLINDER SWITCH

Check door key cylinder switch. 

Refer to 

DLK-261, "Component Inspection"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

NO

>> Replace front door lock key cylinder switch LH.

Component Inspection

INFOID:0000000009756571

COMPONENT INSPECTION

1.

CHECK DOOR KEY CYLINDER SWITCH

Check front door lock key cylinder switch LH.

Is the inspection result normal?

YES

>> Key cylinder switch is OK.

NO

>> Replace front door lock key cylinder switch LH.

Front door lock key cylin-

der switch LH connector

Terminal

BCM connector

Terminal

Continuity

D9

6

M21

8

Yes

5

7

Front door lock key cylin-

der switch LH connector

Terminal

Ground

Continuity 

D9

6

No

5

Terminal

Key position

Continuity

Front door lock key cylinder 

switch LH connector

6

4

Lock

Yes

Neutral / Unlock

No

5

Unlock

Yes

Neutral / Lock

No

DLK-262

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

KEY SWITCH (BCM INPUT)

KEY SWITCH (BCM INPUT)

Diagnosis Procedure

INFOID:0000000009756572

Regarding Wiring Diagram information, refer to 

DLK-224, "Wiring Diagram"

.

1.

CHECK KEY SWITCH INPUT SIGNAL

With CONSULT

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

DLK-221, "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 M21 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)

(+)

(–)

M21

37

Ground

Key is inserted.

Battery voltage

Key is removed.

0

Terminals

Condition

Continuity

1 – 2

Key is inserted.

Yes

Key is removed.

No

DOOR LOCK ACTUATOR

DLK-263

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

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:0000000009756573

Locks/unlocks the door with the signal from BCM.

DRIVER SIDE : Component Function Check

INFOID:0000000009756574

1.

CHECK FUNCTION

1. Use CONSULT to perform Active Test (“DOOR LOCK”).

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

YES

>> Door lock actuator is OK.

NO

>> Refer to 

DLK-263, "DRIVER SIDE : Diagnosis Procedure"

.

DRIVER SIDE : Diagnosis Procedure

INFOID:0000000009756575

Regarding Wiring Diagram information, refer to 

DLK-233, "Wiring Diagram"

.

1.

CHECK OUTPUT SIGNAL

Check voltage between BCM connector and ground.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> GO TO 2

2.

CHECK DOOR LOCK ACTUATOR CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM and front door lock actuator driver side connector.

3. Check continuity between BCM connector and front door lock actuator driver side connector. 

4. Check continuity between BCM connector and ground.

Is the inspection result normal?

YES

>> Replace front door lock actuator LH.

NO

>> Repair or replace harness.

Terminals

Condition of 

door lock and 
unlock switch

Voltage (V)

(Approx.)

(+)

(–)

BCM

connector

Terminal

M20

64

Ground

Unlock

0 

→ Battery voltage → 0

66

Lock

0 

→ Battery voltage → 0

BCM connector

Terminal

Door lock actuator 

connector

Terminal

Continuity 

M20

64

D9

2

Yes

66

1

BCM connector

Terminal

Continuity 

M20

64

Ground

No

66