Infiniti Q45. Manual - part 228

VEHICLE SECURITY (THEFT WARNING) SYSTEM

BL-181

C

D

E

F

G

H

J

K

L

M

A

B

BL

Diagnostic Procedure 4

NIS000X1

4–1 CHECK DOOR KEY CYLINDER LOCK SWITCH

1. 

CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL (LOCK SIGNAL)

 With CONSULT-II

Check front door key cylinder switch (driver side) “KEY CYL LK-DR” in “DATA MONITOR” mode with CON-
SULT-II.

 Without CONSULT-II

Check voltage between driver door control unit (LCU01) connector
and ground.

OK or NG

OK

>> Front door key cylinder switch (driver side) “lock” is OK.

NG

>> GO TO 2.

“KEY CYL LK-DR” should be “ON” when key inserted 
in door key cylinder was turned to lock.

PIIA0350E

Connector

Terminal (wire color)

Key position

Voltage (V)

(Approx.)

( + )

( – )

D8

10 (GY)

Ground

Neutral / Unlock

5

Lock

0

PIIA2805E

BL-182

VEHICLE SECURITY (THEFT WARNING) SYSTEM

2. 

CHECK DOOR KEY CYLINDER SWITCH

1.

Turn ignition switch “OFF”.

2.

Disconnect front door key cylinder switch (driver side) connector.

3.

Check continuity between front door key cylinder switch (driver side) terminals 2 and 3.

OK or NG

OK

>> Check the following.

●

Front door key cylinder switch (driver side) ground cir-
cuit

●

Harness for open or short between driver door control
unit (LCU01) and front door key cylinder switch (driver
side)

NG

>> Replace front door key cylinder switch (driver side).

Terminal

Condition

Continuity

2 3

Neutral / Unlock

No

Lock

Yes

PIIB0203E

VEHICLE SECURITY (THEFT WARNING) SYSTEM

BL-183

C

D

E

F

G

H

J

K

L

M

A

B

BL

4–2 CHECK DOOR KEY CYLINDER UNLOCK SWITCH

1. 

CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL (UNLOCK SIGNAL)

 With CONSULT-II

Check front door key cylinder switch (driver side) “KEY CYL UN-DR” in “DATA MONITOR” mode with CON-
SULT-II.

 Without CONSULT-II

Check voltage between driver door control unit (LCU01) connector
and ground.

OK or NG

OK

>> Front door key cylinder switch (driver side) (unlock) is

OK.

NG

>> GO TO 2.

“KEY CYL UN-DR” should be “ON” when key inserted 
in driver door key cylinder was turned to unlock.

PIIA0353E

Connector

Terminal (wire color)

Key position

Voltage (V)

(Approx.)

( + )

( – )

D8

9 (PU/W)

Ground

Neutral / Lock

5

Unlock

0

PIIA2854E

BL-184

VEHICLE SECURITY (THEFT WARNING) SYSTEM

2. 

CHECK DOOR KEY CYLINDER SWITCH

1.

Turn ignition switch “OFF”.

2.

Disconnect front door key cylinder switch (driver side) connector.

3.

Check continuity between front door key cylinder switch (driver
side) terminals 1 and 2.

OK or NG

OK

>> Check the following.

●

Front door key cylinder switch (driver side) ground cir-
cuit

●

Harness for open or short between driver door control
unit (LCU01) and front door key cylinder switch (driver side)

NG

>> Replace front door key cylinder switch (driver side).

Diagnostic Procedure 5

NIS000X2

CHECK TRUNK LID KEY UNLOCK SIGNAL

1. 

CHECK TRUNK KEY CYLINDER SWITCH INPUT SIGNAL (UNLOCK SIGNAL)

 With CONSULT-II

Check trunk lid key cylinder switch “TRUNK UNLK SW” in “DATA MONITOR” mode with CONSULT

−

II.

●

When key in key cylinder is at “NEUTRAL” position,

●

When key is “UNLOCK” position,

 Without CONSULT-II

Check trunk lid key cylinder switch in Switch monitor mode.
Refer to Remote keyless entry system 

BL-82, "SWITCH MONITOR"

.

OK or NG

OK

>> Trunk lid key cylinder switch is OK.

NG

>> GO TO 2.

2. 

CHECK TRUNK KEY CYLINDER SWITCH (UNLOCK SWITCH)

1.

Turn ignition switch OFF.

2.

Disconnect trunk lid key cylinder switch connector.

3.

Check continuity between trunk lid key cylinder switch terminals
1 and 2.

OK or NG

OK

>> Check the following.

●

Trunk lid key cylinder switch ground circuit

●

Harness for open or short between trunk lid key cylin-
der switch and BCM

NG

>> Replace trunk lid key cylinder switch.

Terminal

Condition

Continuity

1

2

Neutral / Lock

No

Unlock

Yes

PIIB0204E

TRUNK UNLK SW: OFF

TRUNK UNLK SW: ON

PIIA0356E

Terminals

Condition

Continuity

1

2

Neutral

No

Unlocked

Yes

PIIB0202E