Infiniti M45 (Y34). Manual — part 581

POWER WINDOW SYSTEM

GW-35

C

D

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2.

CHECK DRIVER DOOR CONTROL UNIT CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect driver door control unit (LCU01) connector.

3.

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

4.

Check continuity between driver door control unit (LCU01) con-
nector D8 terminals 11,18 and ground.

OK or NG

OK

>> Replace driver door control unit (LCU01).

NG

>> Repair or replace harness between driver door control

unit (LCU01) and front power window regulator (driver side).

Front Power Window Regulator Circuit Check (Passenger Side)

AIS001N1

1.

CHECK PASSENGER DOOR CONTROL UNIT OUTPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect front power window regulator (passenger side) connector.

3.

Turn ignition switch ON.

4.

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

OK or NG

OK

>> Replace power window regulator (passenger side).

NG

>> GO TO 2.

18 (L/R) – 1 (L/R)

: Continuity should exist.

11 (L/W) – 2 (L/W)

: Continuity should exist.

11 (L/W) – Ground

: Continuity should not exist.

18 (L/R) – Ground

: Continuity should not exist.

PIIA2706E

Connector

Terminals (Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(–)

D37

1 (L/R)

Ground

Closing

Battery voltage

Opening

0

2 (L/W)

Closing

0

Opening

Battery voltage

PIIA2707E

GW-36

POWER WINDOW SYSTEM

2.

CHECK FRONT POWER WINDOW REGULATOR (PASSENGER SIDE) CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect passenger door control unit connector.

3.

Check continuity between passenger door control unit connector D38 terminals 3, 14 and front power win-
dow regulator (passenger side) connector D37 terminals 1, 2.

4.

Check continuity between passenger door control unit connector
D38 terminals 3, 14 and ground.

OK or NG

OK

>> Replace passenger door control unit.

NG

>> Repair or replace harness between passenger door

control unit and front power window regulator (passenger side).

Rear Power Window Regulator LH or RH Circuit Check

AIS001N2

1.

CHECK REAR DOOR CONTROL UNIT LH OR RH OUTPUT SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between rear power window regulator LH or RH connector D57 (LH) or D77 (RH) terminals
1, 2 and ground.

OK or NG

OK

>> Replace rear power window regulator LH or RH.

NG

>> GO TO 2.

2.

CHECK REAR POWER WINDOW REGULATOR LH OR RH CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect rear door control unit LH or RH and rear power window regulator LH or RH connector.

3.

Check continuity between rear door control unit LH or RH connector D58 (LH) or D78 (RH) terminals 3, 14
and rear power window regulator LH or RH connector D57 (LH) or D77 (RH) terminals 1, 2.

4.

Check continuity between rear door control unit LH or RH con-
nector D58 (LH) or D78 (RH) terminals 3, 14 and ground.

OK or NG

OK

>> Replace rear door control unit LH or RH.

NG

>> Repair or replace harness between rear door control

unit LH or RH and rear power window regulator LH or RH.

3 (L/W) – 2 (L/W)

: Continuity should exist.

14 (L/R) – 1 (L/R)

: Continuity should exist.

3 (L/W) – Ground

: Continuity should not exist.

14 (L/R) – Ground

: Continuity should not exist.

PIIA2683E

Connector

Terminals (Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(–)

D57 (LH)

D77 (RH)

1 (L/R)

Ground

Closing

Battery voltage

Opening

0

2 (L/W)

Closing

0

Opening

Battery voltage

PIIB0546E

3 (L/W) – 2 (L/W)

: Continuity should exist.

14 (L/R) – 1 (L/R)

: Continuity should exist.

3 (L/W) – Ground

: Continuity should not exist.

14 (L/R) – Ground

: Continuity should not exist.

PIIB0547E

POWER WINDOW SYSTEM

GW-37

C

D

E

F

G

H

J

K

L

M

A

B

GW

Limit Switch Check (Driver Side)

AIS001N3

1.

CHECK DRIVER DOOR LIMIT SWITCH SIGNAL

1.

Turn ignition switch ON.

2.

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

OK or NG

OK

>> Limit switch circuit is OK.

NG

>> GO TO 2.

2.

CHECK LIMIT SWITCH GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect front power window regulator (driver side) connector.

3.

Check continuity between front power window regulator (driver side) connector D7 terminal 3 and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness.

3.

CHECK HARNESS CONTINUITY

1.

Disconnect driver door control unit (LCU01) connector.

2.

Check continuity between driver door control unit (LCU01) connector D8 terminal 7 and front power win-
dow regulator (driver side) connector D7 terminal 4.

3.

Check continuity between driver door control unit (LCU01) con-
nector D8 terminal 7 and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness between driver door control

unit (LCU01) and front power window regulator (driver
side).

Connector

Terminals (Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(–)

D8

7 (PU)

Ground

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

0

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

5

PIIA2686E

3 (B) – Ground

: Continuity should exist.

PIIA2687E

7 (PU) – 4 (PU)

: Continuity should exist.

7 (PU) – Ground

: Continuity should not exist.

PIIB0548E

GW-38

POWER WINDOW SYSTEM

4.

CHECK DRIVER DOOR CONTROL UNIT OUTPUT SIGNAL

1.

Connect driver door control unit (LCU01) connector.

2.

Turn ignition switch ON.

3.

Check voltage between driver door control unit (LCU01) connector D8 terminal 7 and ground.

OK or NG

OK

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

NG

>> Replace driver door control unit (LCU01).

Limit Switch Check (Passenger Side)

AIS001N4

1.

CHECK PASSENGER DOOR LIMIT SWITCH SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between passenger door control unit connector and ground.

OK or NG

OK

>> Limit switch circuit is OK.

NG

>> GO TO 2.

2.

CHECK LIMIT SWITCH GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect front power window regulator (passenger side) connector.

3.

Check continuity between front power window regulator (passenger side) connector D37 terminal 3 and
ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness.

7(PU) – Ground

: Approx. 5V

PIIA2686E

Connector

Terminals (Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(–)

D38

1 (PU)

Ground

Passenger side door window
is in a position between fully-
open and just before fully-
closed position (ON).

0

Passenger side door window
is in a position between just
before fully-closed position
and fully-closed position
(OFF).

5

PIIA2689E

3 (B) – Ground

: Continuity should exist.

PIIA2690E