Nissan Titan. Manual - part 529

SEC-28

< DTC/CIRCUIT DIAGNOSIS >

KEY CYLINDER SWITCH

KEY CYLINDER SWITCH

KING CAB
KING CAB : Description

INFOID:0000000009878888

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:0000000009878889

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 

SEC-28, "KING CAB : Diagnosis Procedure"

.

KING CAB : Diagnosis Procedure

INFOID:0000000009878890

Regarding Wiring Diagram information, refer to 

SEC-54, "Wiring Diagram"

.

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 

BCS-16, "DOOR LOCK : CONSULT Function (BCM - DOOR

LOCK)"

.

• 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

KEY CYLINDER SWITCH

SEC-29

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

L

M

A

B

SEC

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 (A) 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 

DLK-128, "Removal and

Installation"

.

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

SEC-30

< DTC/CIRCUIT DIAGNOSIS >

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:0000000009878891

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:0000000009878892

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 

SEC-30, "CREW CAB : Diagnosis Procedure"

.

CREW CAB : Diagnosis Procedure

INFOID:0000000009878893

Regarding Wiring Diagram information, refer to 

SEC-54, "Wiring Diagram"

.

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 

BCS-16, "DOOR LOCK : CONSULT Function (BCM - DOOR

LOCK)"

.

• 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

KEY CYLINDER SWITCH

SEC-31

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

L

M

A

B

SEC

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 (A) 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 

DLK-128, "Removal and

Installation"

.

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