Infiniti Q45. Manual - part 194

POWER DOOR LOCK SYSTEM

BL-45

C

D

E

F

G

H

J

K

L

M

A

B

BL

2. 

CHECK COMMUNICATION SIGNAL 

1.

Connect driver door control unit (LCU01) and malfunctioning door control unit connector.

2.

Check the signal between malfunctioning door control unit connector and ground with oscilloscope.

OK or NG

OK

>> Communication signal is OK.

NG

>>

●

All door control unit (passenger, rear LH and RH) are NG. 

→

 Replace Driver door control unit.

●

Any of door control unit (passenger, rear LH or RH door control unit) are NG. 

→

 Replace mal-

functioning door control unit.

Check Door Lock and Unlock Switch

NIS000U5

1. 

CHECK DOOR LOCK AND UNLOCK SWITCH

 With CONSULT-II

See “DOOR LK SW-LK and UN” in DATA MONITOR mode with CONSULT-II.

●

When door lock and unlock switch is turned to lock:

●

When lock and unlock switch is turned to unlock:

 Without CONSULT-II

Check door lock and unlock switch operation in “SWITCH MONITOR” mode.
Refer to 

BL-42, "SWITCH MONITOR"

 .

OK or NG

OK

>> Replace driver door control unit (LCU01).

NG

>> Replace door lock and unlock switch.

Passen-
ger door 
control 
unit

Terminal

Signal

(Reference value)

(+)

(–)

Connector

Terminal

(Wire color)

Ground

D38

11 (G/OR)

Rear LH, 
RH  door 
control 
unit

Terminal

(+)

(–)

Connector

Terminal

(Wire color)

Ground

D58 (LH)

D78 (RH)

11 (G/OR)

PIIB0178E

SIIA0591J

DOOK LK SW-LK

: ON

DOOK LK SW-UN

: ON

SEL561W

BL-46

POWER DOOR LOCK SYSTEM

Check Door Lock Actuator (Driver Side)

NIS000U6

1. 

CHECK DOOR LOCK ACTUATOR HARNESS 

1.

Turn the ignition switch OFF.

2.

Disconnect driver door control unit (LCU01) and door lock actuator connector.

3.

Check continuity between driver door control unit (LCU01) connector D8 terminals 12, 17 and front door
lock actuator connector D11 terminals 1, 3.

4.

Check continuity between driver door control unit (LCU01) con-
nector D8 terminals 12, 17 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace harness.

2. 

CHECK OUTPUT SIGNAL

1.

Connect driver door control unit (LCU01) connector.

2.

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

OK or NG

OK

>> Replace front door lock actuator (driver side). 

NG

>> Replace driver door control unit (LCU01).

Check Door Lock Actuator (Passenger, Rear LH, RH)

NIS000U7

1. 

CHECK DOOR LOCK ACTUATOR HARNESS 

1.

Turn the ignition switch OFF.

2.

Disconnect passenger, rear LH, RH door control unit and door lock actuator connectors.

3.

Check continuity between passenger door control unit connector D39 terminals 2, 3 and door lock actua-
tor connector D41 (Passenger), D61 (Rear LH) and D81 (Rear RH) terminals 1, 3.

4.

Check continuity between passenger door control unit connector
terminals 2,  3 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace harness.

12 (BR) – 3 (BR)

: Continuity should exist.

17 (LG) – 1 (LG)

: Continuity should exist.

12 (BR) – Ground

: Continuity should not exist.

17 (LG) – Ground

: Continuity should not exist.

PIIA2816E

Connector

Terminal

(Wire color)

Door lock 
operation

Voltage (V)

(Approx.)

(+)

(–)

D8

17 (LG)

Ground

Free

→

Lock

0 

→

 Battery voltage 

→

 0

12 (BR)

Free

→

Unlock

PIIA2817E

1 (SB) – 2 (SB)

: Continuity should exist.

3 (BR) – 3 (BR)

: Continuity should exist.

2 (SB) – Ground

: Continuity should not exist.

3 (BR) – Ground

: Continuity should not exist.

PIIB0242E

POWER DOOR LOCK SYSTEM

BL-47

C

D

E

F

G

H

J

K

L

M

A

B

BL

2. 

CHECK OUTPUT SIGNAL

1.

Connect passenger door control unit connector.

2.

Check voltage between passenger door control unit connector and ground.

OK or NG

OK

>> Replace malfunction door lock actuator.

NG

>> Replace passenger door control unit.

Check Front Door Key Cylinder Switch

NIS000U8

1. 

CHECK DOOR KEY CYLINDER SWITCH SIGNAL

 With CONSULT-II

Check front door key cylinder switch (“KEY CYL LK-SW”, “KEY CYL UN-SW”) in DATA MONITOR mode in
CONSULT–II.Refer to 

BL-38, "DATA MONITOR"

 .

●

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

●

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

 Without CONSULT-II

Check front door key cylinder switch operation in “SWITCH MONITOR” mode. Refer to 

BL-42, "SWITCH

MONITOR"

 .

OK or NG

OK

>> System is OK.

NG

>> GO TO 2.

Connector

Terminal

(Wire color)

Door lock 
operation

Voltage (V)

(Approx.)

(+)

(–)

D39

2 (SB)

Ground

Free 

→

 Lock

0 

→

 Battery voltage 

→

 0

3 (BR)

Free 

→

 Unlock

PIIB0442E

KEY CYL LK

: ON

KEY CYL UN

: ON

PIIA3149E

BL-48

POWER DOOR LOCK SYSTEM

2. 

CHECK DOOR KEY CYLINDER SWITCH

Check continuity between door key cylinder switch terminals 1, 3 and 2.

OK or NG

OK

>> Check the following.

●

Harness between front key cylinder switch and driver
door control unit

●

Harness between front key cylinder switch and ground

NG

>> Replace front door key cylinder switch.

Check Key Switch

NIS000U9

1. 

CHECK KEY SWITCH 

With CONSULT-II

Check key switch “IGN KEY SW” in “DATA MONITOR” mode with CONSULT-II.

Without CONSULT-II

Check voltage between BCM connector and ground.

OK or NG

OK

>> Key switch is OK.

NG

>> GO TO 2.

Terminals

Condition

Continuity

1 

2

Key is turned to UNLOCK

Yes

Key is turned to LOCK or neutral.

No

3

Key is turned to LOCK.

Yes

Key is turned to UNLOCK or neutral.

No

PIIA3148E

Key is inserted in ignition key 
cylinder

: IGN KEY SW  ON

Key is removed from ignition 
key cylinder

: IGN KEY SW  OFF

PIIA4243E

Connector

Terminal

(Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(–)

M4

69 (PU/W)

Ground

Key is inserted

Battery voltage

Key is removed

0

PIIA2820E