Infiniti M45 (Y34). Manual - part 583

POWER WINDOW SYSTEM

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Driver Door Control Unit Circuit Check

AIS001N8

1. 

CHECK POWER SUPPLY CIRCUIT 

1.

Turn ignition switch OFF.

2.

Disconnect driver door control unit (LCU01) connector.

3.

Check voltage between driver door control unit (LCU01) connector D8 terminal 14 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Check the following.

●

40A fusible link (letter H. located in fuse and fusible
link box).

●

Harness for open or short between driver control unit
(LCU01) and fuse.

2. 

CHECK GROUND CIRCUIT 

Check continuity between driver door control unit (LCU01) connector D8 terminal 15 and ground.

OK or NG

OK

>> INSPECTION END

NG

>> Repair or replace harness.

Passenger Door Control Unit Circuit Check

AIS001NR

1. 

CHECK POWER SUPPLY CIRCUIT 

1.

Turn ignition switch OFF.

2.

Disconnect passenger door control unit connector.

3.

Check voltage between passenger door control unit connector D38 terminal 10 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Check the following.

●

40A fusible link (letter H, located in fuse and fusible
link box).

●

Harness for open or short between passenger control
unit and fuse.

14 (Y/G) – Ground 

: Battery voltage

PIIA2703E

15 (B) – Ground

: Continuity should exist.

PIIA2704E

10 (W/R) – Ground

: Battery voltage

PIIA2848E

GW-44

POWER WINDOW SYSTEM

2. 

CHECK GROUND CIRCUIT

Check continuity between passenger door control unit connector D38 terminal 11 and ground.

OK or NG

OK

>> INSPECTION END

NG

>> Repair or replace harness.

Rear Door Control Unit (LH or RH) Circuit Check

AIS001NS

1. 

CHECK POWER SUPPLY CIRCUIT 

1.

Turn ignition switch OFF.

2.

Disconnect rear door control unit connector.

3.

Check voltage between rear door control unit LH or RH connector D58 or D78 terminal 10 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Check the following.

●

40A fusible link (letter H, located in fuse and fusible
link box).

●

Harness for open or short between rear control unit
LH or RH and fuse.

2. 

CHECK GROUND CIRCUIT 

Check continuity between rear door control unit LH or RH connector D58 or D78 terminal 11 and ground.

OK or NG

OK

>> INSPECTION END

NG

>> Repair or replace harness.

11 (B) – Ground

: Continuity should exist.

PIIA2849E

10 (Y/B) – Ground 

: Battery voltage

PIIA2850E

11 (B) – Ground

: Continuity should exist.

PIIA2851E

POWER WINDOW SYSTEM

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Door Switch Check

AIS001NU

1. 

CHECK DOOR SWITCH INPUT SIGNAL

With CONSULT-II

●

Check door switch in “DATE MONITOR” mode with CONSULT-II.

Without CONSULT-II

●

Check all door switches in switch monitor mode.
Refer to Remote keyless entry system, 

BL-79, "SWITCH MONI-

TOR"

 .

OK or NG

OK

>> Door switch is OK.

NG

>> GO TO 2.

2. 

CHECK DOOR SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect door switch connector.

3.

Check continuity between following terminals and ground.

OK or NG

OK

>> Check harness for open and short between door switch

and BCM.

NG

>> Check door switch ground condition.

Door Key Cylinder Switch Check 

AIS002MV

1. 

CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL

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

OK or NG

OK

>> Further inspection is necessary. Refer to symptom

chart.

NG

>> GO TO 2.

When door is opened

: DOOR SW ON

When door is closed

: DOOR SW OFF

PIIA2464E

Door switch connector

Terminals

(Wire color)

Condition

Continuity

Front door switch 
(driver side)

B20

1 (R/Y) – Ground

Pressed

No

Released

Yes

Front door switch
(passenger side)

B220

1 (LG) – Ground

Pressed

No

Released

Yes

PIIB0305E

Connector

Terminals (Wire color)

Key position 

Voltage (V) 

(Approx.)

(+)

(–)

D8

9 (PU/W)

Ground

Neutral/Unlock

5

Lock

0

10 (GY)

Neutral/Lock

5

Unlock

0

PIIA4717E

GW-46

POWER WINDOW SYSTEM

2. 

CHECK DOOR KEY CYLINDER SWITCH CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect driver door control unit (LCU01) and front door key cylinder switch connector.

3.

Check continuity between driver door control unit (LCU01) connector D8 terminal 9, 10 and front door key
cylinder switch connector D12 terminals 1, 3.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness between driver door control

unit (LCU01) and front door key cylinder switch.

3. 

CHECK DOOR KEY CYLINDER SWITCH GROUND 

Check continuity between front door key cylinder switch connector
D12 terminal 2 and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness.

4. 

CHECK DOOR KEY CYLINDER SWITCH

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

OK or NG

OK

>> Check the condition of the harness and the connector.

NG

>> Replace door key cylinder switch.

9 (PU/W) – 1 (PU/W)

: Continuity should exist.

10 (GY) – 3 (GY)

: Continuity should exist.

PIIB0552E

2 (B) – Ground

: Continuity should exist.

PIIA3354E

Terminals

Key position

Continuity 

1

2

Neutral/Lock

No

Unlock

Yes

3

Neutral/Unlock

No

Lock

Yes

PIIB0553E