Infiniti FX35, FX50 (S51). Manual - part 1495

POWER WINDOW SERIAL LINK

PWC-41

< DTC/CIRCUIT DIAGNOSIS >

[FRONT & REAR WINDOW ANTI-PINCH]

C

D

E

F

G

H

I

J

L

M

A

B

PWC

N

O

P

YES

>> Replace power window main switch. Refer to 

PWC-136, "Removal and Installation"

.

NO

>> GO TO 2.

2.

CHECK POWER WINDOW SERIAL LINK CIRCUIT

1.

Disconnect BCM connector.

2.

Check continuity between BCM harness connector and power window main switch harness connector.

3.

Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-83, "Exploded View"

.

NO

>> Repair or replace harness.

FRONT POWER WINDOW SWITCH (PASSENGER SIDE)

FRONT POWER WINDOW SWITCH (PASSENGER SIDE) : Description

INFOID:0000000005248197

Power window main switch, front power window switch (passenger side), rear power window switch and BCM
transmit and receive the signal by power window serial link.
The signal mentioned below is transmitted from BCM to power window main switch, front power window
switch (passenger side) and rear power window switch.
•  Keyless power window down signal
The signal mentioned below is transmitted from power window main switch to front power window switch (pas-
senger side) and rear power window switch.
• Front passenger side door window and rear door window operation signal
• Power window control by key cylinder switch signal
• Power window lock switch signal
• Retained power operation signal 

FRONT POWER WINDOW SWITCH (PASSENGER SIDE) : Component Function 
Check

INFOID:0000000005248198

1.

CHECK POWER WINDOW SWITCH OUTPUT SIGNAL

 With CONSULT-III

Check (“CDL LOCK SW ”, “CDL UNLOCK SW”) in “DATA MONITOR” mode for “POWER DOOR LOCK SYS-
TEM” with CONSULT-III. Refer to 

DLK-53, "DOOR LOCK : CONSULT-III Function (BCM - DOOR LOCK)"

.

Is the inspection result normal?

YES

>> Power window serial link is OK.

NO

>> Refer to 

PWC-42, "FRONT POWER WINDOW SWITCH (PASSENGER SIDE) : Diagnosis Proce-

dure"

.

BCM

Power window main switch

Continuity

Connector

Terminal

Connector

Terminal

M123

132

D8

14

Existed

BCM

Ground

Continuity 

Connector

Terminal

M123

132

Not existed

Monitor item

Condition

CDL LOCK SW 

LOCK

: ON

UNLOCK

: OFF

CDL UNLOCK SW 

LOCK

: OFF

UNLOCK

: ON

PWC-42

< DTC/CIRCUIT DIAGNOSIS >

[FRONT & REAR WINDOW ANTI-PINCH]

POWER WINDOW SERIAL LINK

FRONT POWER WINDOW SWITCH (PASSENGER SIDE) : Diagnosis Procedure

INFOID:0000000005248199

1.

CHECK POWER WINDOW SWITCH INPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect front power window switch (passenger side) connector.

3.

Check signal between front power window switch (passenger side) harness connector and ground with
oscilloscope when door lock and unlock switch (driver side and passenger side) is turned to “LOCK” or
“UNLOCK”.

4.

Check that signals which are shown in the figure below can be detected during 10 seconds just after door
lock and unlock switch (driver side and passenger side) is turned to “LOCK” or “UNLOCK”.

Is the inspection result normal?

YES

>> Replace front power window switch (passenger side). Refer to 

PWC-137, "Removal and Installa-

tion"

.

NO

>> GO TO 2.

2.

CHECK POWER WINDOW SERIAL LINK CIRCUIT

1.

Disconnect BCM connector.

2.

Check continuity between BCM harness connector and front power window switch (passenger side)
harness connector.

3.

Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-83, "Exploded View"

.

NO

>> Repair or replace harness.

REAR LH

REAR LH : Description

INFOID:0000000005248200

Power window main switch, front power window switch (passenger side), rear power window switch and BCM
transmit and receive the signal by power window serial link.
The signal mentioned below is transmitted from BCM to power window main switch, front power window
switch (passenger side) and rear power window switch.
•  Keyless power window down signal
The signal mentioned below is transmitted from power window main switch to front power window switch (pas-
senger side) and rear power window switch.
• Front passenger side door window and rear door window operation signal

(+)

(–)

Signal

(Reference value)

Front power window switch (passenger side)

Connector

Terminal 

D38

16

Ground

JPMIA0013GB

BCM

Front power window switch (passenger side)

Continuity

Connector

Terminal

Connector

Terminal

M123

132

D38

16

Existed

BCM

Ground

Continuity 

Connector

Terminal

M123

132

Not existed

POWER WINDOW SERIAL LINK

PWC-43

< DTC/CIRCUIT DIAGNOSIS >

[FRONT & REAR WINDOW ANTI-PINCH]

C

D

E

F

G

H

I

J

L

M

A

B

PWC

N

O

P

• Power window control by key cylinder switch signal
• Power window lock switch signal
• Retained power operation signal 

REAR LH : Component Function Check

INFOID:0000000005248201

1.

CHECK POWER WINDOW SWITCH OUTPUT SIGNAL

 With CONSULT-III

Check (“CDL LOCK SW ”, “CDL UNLOCK SW”) in “DATA MONITOR” mode for “POWER DOOR LOCK SYS-
TEM” with CONSULT-III. Refer to 

DLK-53, "DOOR LOCK : CONSULT-III Function (BCM - DOOR LOCK)"

.

Is the inspection result normal?

YES

>> Power window serial link is OK.

NO

>> Refer to 

PWC-43, "REAR LH : Diagnosis Procedure"

.

REAR LH : Diagnosis Procedure

INFOID:0000000005248202

1.

CHECK POWER WINDOW SWITCH INPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect rear power window switch LH connector.

3.

Check signal between rear power window switch LH harness connector and ground with oscilloscope
when door lock and unlock switch (driver side and passenger side) is turned to “LOCK” or “UNLOCK”.

4.

Check that signals which are shown in the figure below can be detected during 10 second just after door
lock and unlock switch (driver side and passenger side) is turned to “LOCK” or “UNLOCK”.

Is the inspection result normal?

YES

>> Replace rear power window switch LH. Refer to 

PWC-138, "Removal and Installation"

.

NO

>> GO TO 2.

2.

CHECK POWER WINDOW SERIAL LINK CIRCUIT

1.

Disconnect BCM connector.

2.

Check continuity between BCM harness connector and rear power window switch LH harness connector.

3.

Check continuity between BCM harness connector and ground.

Monitor item

Condition

CDL LOCK SW 

LOCK

: ON

UNLOCK

: OFF

CDL UNLOCK SW 

LOCK

: OFF

UNLOCK

: ON

(+)

(–)

Signal

(Reference value)

Rear power window switch LH

Connector

Terminal 

D57

16

Ground

JPMIA0013GB

BCM

Rear power window switch LH

Continuity

Connector

Terminal

Connector

Terminal

M123

132

D57

16

Existed

PWC-44

< DTC/CIRCUIT DIAGNOSIS >

[FRONT & REAR WINDOW ANTI-PINCH]

POWER WINDOW SERIAL LINK

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-83, "Exploded View"

.

NO

>> Repair or replace harness.

REAR RH

REAR RH : Description

INFOID:0000000005248203

Power window main switch, front power window switch (passenger side), rear power window switch and BCM
transmit and receive the signal by power window serial link.
The signal mentioned below is transmitted from BCM to power window main switch, front power window
switch (passenger side) and rear power window switch.
•  Keyless power window down signal
The signal mentioned below is transmitted from power window main switch to front power window switch (pas-
senger side) and rear power window switch.
• Front passenger side door window and rear door window operation signal
• Power window control by key cylinder switch signal
• Power window lock switch signal
• Retained power operation signal 

REAR RH : Component Function Check

INFOID:0000000005248204

1.

CHECK POWER WINDOW SWITCH OUTPUT SIGNAL

 With CONSULT-III

Check (“CDL LOCK SW ”, “CDL UNLOCK SW”) in “DATA MONITOR” mode for “POWER DOOR LOCK SYS-
TEM” with CONSULT-III. Refer to 

DLK-53, "DOOR LOCK : CONSULT-III Function (BCM - DOOR LOCK)"

.

Is the inspection result normal?

YES

>> Power window serial link is OK.

NO

>> Refer to 

PWC-44, "REAR RH : Diagnosis Procedure"

.

REAR RH : Diagnosis Procedure

INFOID:0000000005248205

1.

CHECK POWER WINDOW SWITCH INPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect rear power window switch RH connector.

3.

Check signal between rear power window switch RH harness connector and ground with oscilloscope
when door lock and unlock switch (driver side and passenger side) is turned to “LOCK” or “UNLOCK”.

4.

Check that signals which are shown in the figure below can be detected during 10 second just after door
lock and unlock switch (driver side and passenger side) is turned to “LOCK” or “UNLOCK”.

BCM

Ground

Continuity 

Connector

Terminal

M123

132

Not existed

Monitor item

Condition

CDL LOCK SW 

LOCK

: ON

UNLOCK

: OFF

CDL UNLOCK SW 

LOCK

: OFF

UNLOCK

: ON