Infiniti QX56 (JA60). Manual - part 851

 

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Infiniti QX56 (JA60). Manual - part 851

 

 

SEC-50

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

POWER SUPPLY AND GROUND CIRCUIT

YES

>> Replace the blown fuse or fusible link after repairing the affected circuit.

NO

>> GO TO 2

2.

 CHECK POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM.

3. Check voltage between BCM harness connector and ground.

Is the measurement value normal?

YES

>> GO TO 3

NO

>> Repair or replace harness.

3.

 CHECK GROUND CIRCUIT

Check continuity between BCM harness connector and ground.

Does continuity exist?

YES

>> Inspection End.

NO

>> Repair or replace harness.

Connector

Terminals 

Power

source

Condition

Voltage (V) (Ap-

prox.)

(+)

(-)

M18

11

Ground

ACC 

power 

supply

Ignition 

switch 

ACC or 

ON

Battery voltage

38

Ground

Ignition 

power 

supply

Ignition 

switch ON 

or START

Battery voltage

M20

57

Ground

Battery 

power 

supply

Ignition 

switch 

OFF

Battery voltage

70

Ground

Battery 

power 

supply

Ignition 

switch 

OFF

Battery voltage

LIIA2415E

BCM

Ground

Continuity

Connector

Terminal

M20

67

Yes

LIIA0915E

KEY CYLINDER SWITCH

SEC-51

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

KEY CYLINDER SWITCH

Description

INFOID:0000000005147120

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:0000000005147121

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 

SEC-51, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005147122

Regarding Wiring Diagram information, refer to 

SEC-69, "Wiring Diagram - VEHICLE SECURITY SYSTEM"

.

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?

YES

>> Key cylinder switch signal is OK.

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

SEC-52

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

KEY CYLINDER SWITCH

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

IGNITION KNOB SWITCH

SEC-53

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

IGNITION KNOB SWITCH

Ignition Knob Switch Check

INFOID:0000000005147123

Regarding Wiring Diagram information, refer to 

SEC-94, "Wiring Diagram - INTELLIGENT KEY SYSTEM/

ENGINE START FUNCTION -"

.

1.

CHECK IGNITION KNOB SWITCH

With CONSULT-III

Display “PUSH SW” on DATA MONITOR screen, and check if ON/OFF display is linked to ignition switch oper-

ation.

Without CONSULT-III

1. Turn ignition switch OFF.

2. Disconnect Intelligent Key unit connector.

3. Check voltage between Intelligent Key unit harness connector

M70 terminal 27 and ground.

Is the inspection result normal?

YES

>> Ignition knob switch is OK.

NO

>> GO TO 2

2.

CHECK IGNITION KNOB SWITCH POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect key switch and ignition knob switch connector.

3. Check voltage between key switch and ignition knob switch harness connector M12 terminal 1 and

ground.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Repair or replace key switch and ignition knob switch

power supply circuit.

3.

CHECK IGNITION KNOB SWITCH OPERATION

Check continuity between key switch and ignition knob switch terminals 1 and 2.

Monitor item

Condition

PUSH SW

Ignition switch is pushed: ON

Ignition switch is released: OFF

Connector

Terminals

Condition

Voltage (V)

(Approx.)

(+)

(–)

M70

27

Ground

Ignition switch is 
pushed

Battery voltage

Ignition switch is re-
leased

0

WIIA1175E

1 - Ground

: Battery voltage

PIIB4257E

 

 

 

 

 

 

 

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