Infiniti M45 (Y34). Manual — part 580
POWER WINDOW SYSTEM
GW-31
C
D
E
F
G
H
J
K
L
M
A
B
GW
Terminals and Reference Value for Passenger, Rear LH, RH Door Control Unit
AIS001MX
(): Passenger door control unit
TERMI-
NAL
WIRE
COLOR
ITEM
CONDITION
Voltage (V)
(Approx.)
(1)
PU
Limit switch signal
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
3
L/W
Power window motor
DOWN signal
When power window motor DOWN operates
Battery voltage
(4)
W
Encoder power supply
When ignition switch ON or power window timer
operates
10
10
(W/R)
Y/B
BAT power supply
—
Battery voltage
11
B
Ground
—
0
(12)
G
Encoder pulse signal
When power window motor operates
14
L/R
Power window motor
UP signal
When power window motor UP operates
Battery voltage
15
L/Y
Local data line
When ignition switch ON or power window timer
operates
OCC3383D
SIIA0591J
GW-32
POWER WINDOW SYSTEM
Trouble Diagnosis Symptom Chart
AIS001MY
●
Check that other systems using the signal of the following systems operate normally.
Symptom
Diagnostic procedure.
Refer to page
None of the power windows can be operated using any switch
Check the following.
●
40A fusible link (letter H, located in fuse and fus-
ible link box)
●
Harness for open and short between fuse and
driver control unit (LCU01).
●
Harness for open and short between BCM and
driver door control unit (LCU01).
Refer to
●
Driver door control unit (LCU01)
●
Driver door control unit power and ground circuit
check.
●
BCM
—
One or more power windows cannot be operated using front
power window main switch
1. Driver door control unit circuit check
2. Communication signal circuit check
Driver side power window cannot be operated but other win-
dows can be operated
1. Driver door control unit circuit check
2. Front power window regulator (driver side) cir-
cuit check
Passenger side power window cannot be operated
1. Passenger door control unit circuit check
2. Communication signal circuit check
3. Front power window regulator (passenger side)
check
Rear LH or RH power window cannot be operated
1. Rear door control unit (LH or RH) circuit check
2. Communication signal circuit check
3. Rear power window regulator LH or RH check
Anti-pinch system does not operate normally. (driver side)
1. Limit switch is adjusted
2. Limit switch check (driver side)
3. Encoder switch check (driver side)
4. Door window sliding part malfunction.
●
A foreign material adheres to window glass or
glass run rubber.
●
Glass run rubber wear or deformation.
●
Sash is tilted too much, or not enough.
—
5. Replace driver door control unit
Anti-pinch system does not operate normally. (passenger side)
1. Limit switch is adjusted
2. Limit switch check (passenger side)
3. Encoder switch check (passenger side)
4. Door window sliding part malfunction.
●
A foreign material adheres to window glass or
glass run rubber.
●
Glass run rubber wear or deformation.
●
Sash is tilted too much, or not enough.
—
5. Replace passenger door control unit
POWER WINDOW SYSTEM
GW-33
C
D
E
F
G
H
J
K
L
M
A
B
GW
Communication Signal Circuit Check
AIS001MZ
1.
CHECK COMMUNICATION SIGNAL
1.
Turn ignition switch OFF.
2.
Check the signal between malfunctioning door control unit connector and ground with oscilloscope.
OK or NG
OK
>> Communication signal is OK.
NG
>> GO TO 2.
Power window timer function does not operate properly
1. Door switch check
2. Communication signal circuit check
Check the following
●
harness for open and short between BCM and
driver door control unit (LCU01).
Refer to
●
BCM
●
Key switch check
—
Does not operate by the key cylinder switch.
1. Door key cylinder switch circuit check.
2. Driver door control unit circuit check
3. Replace driver door control unit
Symptom
Diagnostic procedure.
Refer to page
Connector
Terminals (Wire color)
signal
(+)
(–)
D38 (passenger)
D58 (rear LH)
D78 (rear RH)
15 (L/Y)
Ground
PIIA2681E
SIIA0591J
GW-34
POWER WINDOW SYSTEM
2.
CHECK COMMUNICATION CIRCUIT
1.
Disconnect driver door control unit (LCU01) and malfunctioning door control unit connector.
2.
Check continuity between driver door control unit (LCU01) and malfunctioning door control unit connector.
–
Driver door control unit (LCU01) connector D8 terminal 5 and
passenger door control unit connector D38 terminal 15.
–
Driver door control unit (LCU01) connector D8 terminal 5 and
rear LH door control unit connector D58 terminal 15.
–
Driver door control unit (LCU01) connector D8 terminal 5 and
rear RH door control unit connector D78 terminal 15.
3.
Check continuity between driver door control unit (LCU01) connector D8 terminal 5 and body ground.
OK or NG
OK
>> Replace driver door control unit (LCU01).
NG
>> Repair or replace harness between driver door control unit (LCU01) and malfunctioning door con-
trol unit.
Front Power Window Regulator Circuit Check (Driver Side)
AIS001N0
1.
CHECK DRIVER DOOR CONTROL UNIT OUTPUT SIGNAL
1.
Turn ignition switch OFF.
2.
Disconnect front power window regulator (driver side) connector.
3.
Turn ignition switch ON.
4.
Check voltage between front power window regulator (driver side) connector and ground.
OK or NG
OK
>> Replace front power window regulator (driver side).
NG
>> GO TO 2.
5 (L/Y) – 15 (L/Y)
: Continuity should exist.
5 (L/Y) – 15 (L/Y)
: Continuity should exist.
5 (L/Y) – 15 (L/Y)
: Continuity should exist.
5 (L/Y) – Ground
: Continuity should not exist.
PIIA2682E
Connector
Terminals (Wirer color)
Condition
Voltage (V)
(Approx.)
(+)
(–)
D7
1 (L/R)
Ground
Closing
Battery voltage
Opening
0
2 (L/W)
Closing
0
Opening
Battery voltage
PIIA2705E
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