Infiniti Q45. Manual - part 609

POWER WINDOW SYSTEM

GW-29

C

D

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2. 

CHECK COMMUNICATION SIGNAL 

1.

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

2.

Turn ignition switch ON.

3.

Check the signal between malfunctioning door control unit connector terminal 11 and ground with oscillo-
scope.

OK or NG

OK

>> Communication signal is OK.

NG

>>

●

If all door control unit (passenger, rear LH or RH) connected are NG, replace driver door control
unit (LCU01).

●

If any of door control unit (passenger, rear LH or RH) connected are NG, replace malfunctioning
door control unit.

Passenger door control unit

Signal

(Reference value)

Terminals

(+)

(–)

Connector

Terminal

(Wire color)

Ground

D38

11 (G/OR)

Rear LH, RH door control unit

Terminals

(+)

(–)

Connector

Terminal

(Wire color)

Ground

D58 (LH)

D78 (RH)

11 (G/OR)

PIIB1980E

SIIA0591J

GW-30

POWER WINDOW SYSTEM

Check Front Power Window Motor (Driver Side) Circuit 

NIS000YT

1. 

CHECK DRIVER DOOR CONTROL UNIT OUTPUT SIGNAL 

1.

Turn ignition switch ON.

2.

Check voltage between front power window motor (driver side) connector and ground.

OK or NG

OK

>> Replace front power window motor (driver side).

NG

>> GO TO 2

2. 

CHECK DRIVER POWER WINDOW MOTOR CIRCUIT 

1.

Turn ignition switch OFF.

2.

Disconnect front power window motor (driver side) connector and driver door control unit (LCU01) con-
nector.

3.

Check continuity between front power window motor (driver
side) connector D7 terminals 1, 2 and driver door control unit
(LCU01) connector D8 terminals 11, 18.

4.

Check continuity between front power window motor (driver
side) connector D7 terminals 1, 2 and ground.

OK or NG

OK

>> Replace driver door control unit (LCU01).

NG

>> Repair or replace harness.

Check Front Power Window Motor (Passenger Side) Circuit

NIS000YU

1. 

CHECK PASSENGER DOOR CONTROL UNIT OUTPUT SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between front power window motor (passenger side) connector and ground.

OK or NG

OK

>> Replace front power window motor (passenger side).

NG

>> GO TO 2.

Connector

Terminals (Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(–)

D7

1 (L/W)

Ground

Up

0

Down

Battery voltage 

2 (L/R)

Up

Battery voltage

Down

0

PIIB0302E

 1 (L/W) – 11 (L/W)

: Continuity should exist.

 2 (L/R) – 18 (L/R)

: Continuity should exist.

 1 (L/W) – Ground

: Continuity should not exist.

 2 (L/R) – Ground

: Continuity should not exist.

PIIB0141E

Connector

Terminals (Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(–)

D37

1 (L/W)

Ground

Up

0

Down

Battery voltage 

2 (L/R)

Up

Battery voltage

Down

0

PIIB0303E

POWER WINDOW SYSTEM

GW-31

C

D

E

F

G

H

J

K

L

M

A

B

GW

2. 

CHECK FRONT POWER WINDOW MOTOR (PASSENGER SIDE) CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect front power window motor (passenger side) and passenger door control unit connector.

3.

Check continuity between front power window motor (passenger
side) connector D37 terminals 1, 2 and passenger door control
unit connector D39 terminals 4, 5.

4.

Check continuity between front power window motor (passenger
side) connector D37 terminals 1, 2 and ground.

OK or NG

OK

>> Replace passenger door control unit.

NG

>> Repair or replace harness.

Check Rear Power Window Motor (LH or RH) Circuit

NIS000YV

1. 

CHECK REAR DOOR CONTROL UNIT LH OR RH OUTPUT SIGNAL 

1.

Turn ignition switch OFF.

2.

Disconnect rear power window motor LH or RH.

3.

Turn ignition switch ON.

4.

Check voltage between rear power window motor LH or RH connector and ground.

OK or NG

OK

>> Replace rear power window motor LH or RH.

NG

>> GO TO 2

1 (L/W) – 4 (L/W)

:Continuity should exist.

2 (L/R) – 5 (L/R)

:Continuity should exist.

1 (L/W) – Ground

:Continuity should not exist.

2 (L/R) – Ground

:Continuity should not exist.

PIIB0142E

Connector

Terminals (Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(–)

D57 (LH)

D77 (RH)

1 (L/W)

Ground

Up

0

Down

Battery voltage 

3 (L/R)

Up

Battery voltage

Down

0

PIIB0304E

GW-32

POWER WINDOW SYSTEM

2. 

CHECK REAR POWER WINDOW MOTOR LH OR RH CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect rear door control LH or RH unit connector.

3.

Check continuity between rear LH or RH power window motor
connector D57(LH) or D77(RH) terminals 1, 3 and rear door
control unit LH or RH connector D59(LH) or D79(RH) terminals
4, 5.

4.

Check continuity between rear power window motor LH or RH
connector D59(LH) or D79(RH) terminals 1, 3 and ground.

OK or NG

OK

>> Replace rear door control unit LH or RH.

NG

>> Repair or replace harness.

Check Limit Switch (Driver Side)

NIS000YW

1. 

LIMIT SWITCH SIGNAL CHECK 

1.

Turn the ignition switch ON.

2.

Check voltage between front power window motor (driver side) connector and ground.

OK or NG

OK

>> Limit switch (driver side) is OK.

NG

>> GO TO 2.

2. 

LIMIT SWITCH GROUND CHECK

1.

Turn ignition switch OFF.

2.

Disconnect front power window motor (driver side) connector.

3.

Check continuity between front power window motor (driver
side) connector D7 terminal 6 and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness.

1 (L/W) – 4 (L/W)

:Continuity should exist.

3 (L/R) – 5 (L/R)

:Continuity should exist.

1 (L/W) – Ground

:Continuity should not exist.

3 (L/R) – Ground

:Continuity should not exist.

PIIB0144E

Connector

Terminals (Wire color)

Condition

Voltage (V)

(Approx,)

(+)

(–)

D7 5 

(PU)

Ground

Driver side door window is 
between fully-open and just 
before fully-closed position 
(ON) 

0

Driver side door window is 
between just before fully-
closed position and fully-
closed position (OFF)

5

PIIB0146E

6 (B) – Ground

:Continuity should exist.

PIIB0147E