Infiniti QX56 (JA60). Manual - part 227

KEY CYLINDER SWITCH

DLK-79

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

KEY CYLINDER SWITCH

Description

INFOID:0000000005146935

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. 

Component Function Check

INFOID:0000000005146936

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-III.

Is the inspection result normal?

YES

>> Key cylinder switch is OK.

NO

>> Refer to 

DLK-79, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005146937

Regarding Wiring Diagram information, refer to 

DLK-157, "Wiring Diagram — POWER DOOR LOCK SYS-

TEM —"

.

1.

CHECK DOOR KEY CYLINDER SWITCH LH

With CONSULT-III

Check front door lock assembly LH (key cylinder switch) ("KEY CYL LK-SW") and ("KEY CYL UN-SW) in

DATA MONITOR mode with CONSULT–III.

• When key inserted in left front key cylinder is turned to LOCK:

• When key inserted in left front key cylinder is turned to UNLOCK:

Without CONSULT-III

Check voltage between main power window and door lock/unlock

switch connector D7 terminals 4, 6 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

KEY CYL LK-SW

: ON

KEY CYL UN-SW

: ON

Connector

Terminals

Condition of left front key cylinder

Voltage (V)

(Approx.)

(+)

(–)

D7

4

Ground

Neutral/Unlock

5

Lock

0

6

Neutral/Lock

5

Unlock

0

LIIA0566E

DLK-80

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

KEY CYLINDER SWITCH

YES

>> 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-242, "Removal and

Installation"

.

4.

CHECK DOOR KEY CYLINDER HARNESS

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 terminals 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

Continuity

D14

5 – Ground

Yes

WIIA0813E

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

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

WIIA0814E

FRONT DOOR LOCK ACTUATOR LH (DOOR UNLOCK SENSOR)

DLK-81

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

FRONT DOOR LOCK ACTUATOR LH (DOOR UNLOCK SENSOR)

Description

INFOID:0000000005146938

Detects door lock condition of driver door.

Component Function Check

INFOID:0000000005146939

1.

CHECK FUNCTION

 With CONSULT-III

Check door unlock sensor in DATA MONITOR mode.

Is the inspection result normal?

YES

>> Door unlock sensor is OK.

NO

>> Refer to 

DLK-81, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005146940

Regarding Wiring Diagram information, refer to 

DLK-178, "Wiring Diagram — INTELLIGENT KEY SYSTEM —

"

.

1.

CHECK UNLOCK SENSOR POWER SUPPLY

Check voltage between Intelligent Key unit connector terminal 28 and ground.

Is the inspection result normal?

YES

>> Front door lock assembly LH (door unlock sensor) is

OK.

NO

>> GO TO 2

2.

CHECK UNLOCK SENSOR CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect Intelligent Key unit and front door lock assembly LH

(door unlock sensor) connector.

3. Check continuity between Intelligent Key unit harness connector

(A) M70 terminal 28 and front door lock assembly LH (door

unlock sensor) harness connector (B) D14 terminal 4.

4. Check continuity between Intelligent Key unit harness connector

(A) M70 terminal 28 and ground.

Is the inspection result normal?

YES

>> GO TO 3

Monitor item

Condition

DOOR STAT SW (DR DOOR STATE)

Front door lock (driver side) LOCK : OFF

Front door lock (driver side) UNLOCK : ON

Connector

Terminals

Condition

Voltage (V)

(Approx.)

(+)

(-)

M70

28

Ground

Driver side door lock is locked

5

Driver side door lock is un-
locked

0

WIIA1190E

28 – 4

: Continuity should exist.

28 – Ground

: Continuity should not exist.

WIIA1191E

DLK-82

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

FRONT DOOR LOCK ACTUATOR LH (DOOR UNLOCK SENSOR)

NO

>> Repair or replace harness between Intelligent Key unit and front door lock assembly LH (door

unlock sensor).

3.

CHECK UNLOCK SENSOR GROUND CIRCUIT

Check continuity between front door lock assembly LH (door unlock sensor) harness connector D14 terminal 5

and ground.

Is the inspection result normal?

YES

>> GO TO 4

NO

>> Repair or replace harness.

4.

CHECK INTELLIGENT KEY UNIT OUTPUT SIGNAL

1. Connect Intelligent Key unit harness connector.

2. Check voltage between Intelligent Key unit harness connector M70 terminal 28 and ground.

Is the inspection result normal?

YES

>> Refer to 

DLK-82, "Component Inspection"

.

NO

>> Replace Intelligent Key unit. Refer to 

SEC-120,

"Removal and Installation"

.

Component Inspection

INFOID:0000000005146941

1.

CHECK DOOR UNLOCK SENSOR

Check door unlock sensor.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace front lock assembly LH (door unlock sensor). Refer to 

DLK-242, "Removal and Installa-

tion"

.

5 – Ground

: Continuity should exist.

WIIA1192E

28 – Ground

: Approx. 5V

WIIA1193E

Terminal

Front door lock assembly LH condition

Continuity

Front door lock assembly LH

4

5

Unlock

Yes

Lock

No