INFINITI QX56 2004 Factory Service Manual

GW-56
POWER WINDOW SYSTEM
Revision: August 20072004 QX56
4. CHECK POWER WINDOW SERIAL LINK CIRCUIT
1. Disconnect BCM.
2. Check continuity between BCM connector M18 terminal 22 and main power window and door lock/unlock
switch connector D7 terminal 14.
3. Check continuity between BCM connector M18 terminal 22 and power window and door lock/unlock
switch RH connector D105 terminal 16.
OK or NG
OK >> Replace main power window and door lock/unlock
switch or power window and door lock/unlock switch
RH.
NG >> Repair or replace harness.
Rear Power Window Control Unit LH or RH Power Supply and Ground Circuit
Check
EIS0038W
1. CHECK POWER WINDOW POWER SUPPLY CIRCUIT
1. Disconnect rear power window control unit LH or RH.
2. Turn ignition switch ON.
3. Check voltage between rear power window control unit LH or RH connector D209 (LH), D309 (RH) termi-
nal 13 and ground.
OK or NG
OK >> GO TO 2
NG >> GO TO 322 (W/V) - 14 (LG/W) : Continuity should exist.
LIIA0394E
22 (W/V) - 16 (LG/W) : Continuity should exist.
LIIA1271E
13 (W/R) - Ground : Battery voltage
LIIA1346E

POWER WINDOW SYSTEM
GW-57
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Revision: August 20072004 QX56
2. CHECK POWER WINDOW GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between rear power window control unit LH or RH connector D209 (LH), D309 (RH) ter-
minal 15 and ground.
OK or NG
OK >> Rear power window control unit LH or RH power supply
and ground circuit is OK. Refer to GW-36, "
Trouble
Diagnoses Symptom Chart" .
NG >> Repair or replace harness.
3. CHECK REAR POWER WINDOW CONTROL UNIT LH OR RH POWER SUPPLY CIRCUIT
1. Disconnect BCM.
2. Check continuity between BCM connector M20 terminal 69 and rear power window control unit LH or RH
connector D209 (LH), D309 (RH) terminal 13.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
4. CHECK BCM OUTPUT SIGNAL
1. Connect BCM.
2. Turn ignition switch ON.
3. Check voltage between BCM connector M20 terminal 69 and ground.
OK or NG
OK >> Check the condition of the harness and the connector.
NG >> Replace BCM.15 (B) - Ground : Continuity should exist.
LIIA2043E
69 (W/R) - 13 (W/R) : Continuity should exist.
LIIA1352E
69 (W/R) - Ground : Battery voltage
WIIA0508E

GW-58
POWER WINDOW SYSTEM
Revision: August 20072004 QX56
Rear Power Window Switch LH or RH Power Supply and Ground Circuit CheckEIS0038X
1. CHECK POWER WINDOW POWER SUPPLY CIRCUIT
1. Disconnect rear power window switch LH or RH.
2. Turn ignition switch ON.
3. Check voltage between rear power window switch LH or RH connector D203 (LH), D303 (RH) terminals 2,
3 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.
2. CHECK POWER WINDOW GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between rear power window switch LH or RH connector D203 (LH), D303 (RH) terminals
1, 7 and ground.
OK or NG
OK >> Rear power window switch LH or RH power supply and
ground circuit is OK. Refer to GW-36, "
Trouble Diag-
noses Symptom Chart" .
NG >> Repair or replace harness.
Rear Power Window Motor LH Circuit Check EIS0038Y
1. CHECK REAR POWER WINDOW SWITCH LH OUTPUT SIGNAL
1. Disconnect rear power window switch LH.
2. Turn ignition switch ON.
3. Check voltage between rear power window switch LH connector D203 terminals 4, 5 and ground.
OK or NG
OK >> Replace rear power window switch LH.
NG >> GO TO 2.2, 3 (G/W) - Ground : Battery voltage
LIIA1348E
1, 7 (L) - Ground : Continuity should exist.
LIIA2044E
ConnectorTerminals (Wire color)
ConditionVoltage (V)
(Approx.)
(+) (-)
D2034 (W)
GroundClosing 0
Opening Battery voltage
5 (W/R)Closing Battery voltage
Opening 0
LIIA1364E

POWER WINDOW SYSTEM
GW-59
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Revision: August 20072004 QX56
2. CHECK REAR POWER WINDOW SWITCH LH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear power window control unit LH.
3. Check continuity between rear power window switch LH connector D203 terminals 4, 5 and rear power
window control unit LH connector D209 terminals 9, 10.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK REAR POWER WINDOW MOTOR LH CIRCUIT
1. Disconnect rear power window motor LH.
2. Check continuity between rear power window control unit LH connector D209 terminals 11, 12 and rear
power window motor LH connector D204 terminals 1, 2.
OK or NG
OK >> Replace rear power window motor LH.
NG >> Repair or replace harness.
Rear Power Window Motor RH Circuit Check EIS0038Z
1. CHECK REAR POWER WINDOW SWITCH RH OUTPUT SIGNAL
1. Disconnect rear power window switch RH.
2. Turn ignition switch ON.
3. Check voltage between rear power window switch RH connector D303 terminals 4, 5 and ground.
OK or NG
OK >> Replace rear power window switch RH.
NG >> GO TO 2.4 (W) - 9 (W) : Continuity should exist.
5 (W/R) - 10 (W/R) : Continuity should exist.
LIIA1379E
11 (O) - 2 (O) : Continuity should exist.
12 (BR) - 1 (BR) : Continuity should exist.
LIIA1380E
ConnectorTerminals (Wire color)
ConditionVoltage (V)
(Approx.)
(+) (-)
D3034 (W)
GroundClosing 0
Opening Battery voltage
5 (W/L)Closing Battery voltage
Opening 0
LIIA1364E

GW-60
POWER WINDOW SYSTEM
Revision: August 20072004 QX56
2. CHECK REAR POWER WINDOW SWITCH RH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear power window control unit RH.
3. Check continuity between rear power window switch RH connector D303 terminals 4, 5 and rear power
window control unit RH connector D309 terminals 9, 10.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK REAR POWER WINDOW MOTOR RH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear power window motor RH.
3. Check continuity between rear power window control unit RH connector D309 terminals 11, 12 and rear
power window motor RH connector D304 terminals 1, 2.
OK or NG
OK >> Replace rear power window motor RH.
NG >> Repair or replace harness.
Limit Switch Circuit Check Rear LH and RHEIS00390
1. CHECK REAR POWER WINDOW MOTOR LH AND RH LIMIT SWITCH SIGNAL
1. Disconnect rear power window control unit LH or RH.
2. Turn ignition switch ON.
3. Check voltage between rear power window control unit LH or RH connector and ground.
OK or NG
OK >> Limit switch circuit is OK.
NG >> GO TO 2.4 (W) - 9 (W) : Continuity should exist.
5 (W/L) - 10 (W/L) : Continuity should exist.
LIIA1379E
11 (O) - 2 (O) : Continuity should exist.
12 (BR) - 1 (BR) : Continuity should exist.
LIIA1380E
ConnectorTerminals (Wire color)
Condition Voltage (V)
(Approx.)
(+) (-)
D209 (LH)
D309 (RH)3 (G) GroundRear LH or RH door window
is between fully-open and just
before fully-closed position
(ON)0
Rear LH or RH door window
is between just before fully-
closed position and fully-
closed position (OFF)5
LIIA1381E

POWER WINDOW SYSTEM
GW-61
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2. CHECK LIMIT SWITCH GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear power window motor LH or RH.
3. Check continuity between rear power window motor LH or RH connector D204 (LH), D304 (RH) terminal
6 and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. CHECK HARNESS CONTINUITY
Check continuity between rear power window motor LH or RH connector D204 (LH), D304 (RH) terminal 6 and
rear power window control unit LH or RH connector D209 (LH), D309 (RH) terminal 3.
OK or NG
OK >> Replace rear power window switch LH or RH.
NG >> Repair or replace harness.
4. CHECK REAR POWER WINDOW SWITCH LH OR RH OUTPUT SIGNAL
1. Turn ignition switch OFF.
2. Check voltage between rear power window control unit LH or RH harness connector D209 (LH) or D309
(RH) terminal 2 (SB) and ground.
OK or NG
OK >> GO TO 5.
NG >> Replace rear power window control unit LH or RH.6 (G) - Ground : Continuity should exist.
LIIA0923E
6 (G) - 3 (G) : Continuity should exist.
LIIA1383E
2 (SB) - Ground : Approx. 5V
LIIA1384E

GW-62
POWER WINDOW SYSTEM
Revision: August 20072004 QX56
5. CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Check continuity between rear power window control unit LH or RH connector D209 (LH), D309 (RH) ter-
minal 2 and rear power window motor LH or RH connector D204 (LH), D304 (RH) terminal 5.
OK or NG
OK >> Replace rear power window motor LH or RH.
NG >> Repair or replace harness.
Encoder Circuit Check Rear LH or RHEIS00391
1. CHECK REAR POWER WINDOW MOTOR LH OR RH POWER SUPPLY
1. Disconnect rear power window motor LH or RH.
2. Turn ignition switch ON.
3. Check voltage between rear power window motor LH or RH connector D204 (LH) or D304 (RH) terminal 4
and ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2. CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect rear power window control unit LH or RH.
3. Check continuity between rear power window motor LH or RH connector D204 (LH) or D304 (RH) termi-
nal 5 and rear power window control unit LH or RH connector D209 (LH) or D309 (RH) terminal 4.
OK or NG
OK >> Replace rear power window switch LH or RH.
NG >> Repair or replace harness.2 (SB) - 5 (SB) : Continuity should exist.
LIIA1385E
4 (BR/W) - Ground : Approx. 10V
LIIA0378E
4 (BR/W) - 5 (BR/W) : Continuity should exist.
LIIA2302E

POWER WINDOW SYSTEM
GW-63
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Revision: August 20072004 QX56
3. CHECK ENCODER GROUND
1. Turn ignition switch OFF.
2. Check continuity between rear power window motor LH or RH connector D204 (LH) or D304 (RH) termi-
nal 6 and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. CHECK ENCODER GROUND CIRCUIT
Check continuity between rear power window motor LH or RH connector D204 (LH) or D304 (RH) terminal 6
and rear power window control unit LH or RH connector D209 (LH), D309 (RH) terminal 3.
OK or NG
OK >> Replace rear power window control unit LH or RH.
NG >> Repair or replace harness.
5. CHECK ENCODER SIGNAL
1. Connect rear power window motor LH or RH.
2. Turn ignition switch ON.
3. Check the signal between rear power window control unit LH or RH connector D209 (LH) or D309 (RH)
terminal 4 and ground with oscilloscope.
OK or NG
OK >> GO TO 6.
NG >> Replace rear power window control unit LH or RH.6 (G) - Ground : Continuity should exist.
LIIA0923E
6 (G) - 3 (G) : Continuity should exist.
LIIA1383E
Connec-
torTerminals (Wire color)
Condition Signal
(+) (-)
D209
(LH)4 (Y/R)
Ground Opening
D309
(RH)4 (Y/B)
LIIA2301EOCC3383D

GW-64
POWER WINDOW SYSTEM
Revision: August 20072004 QX56
6. CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect rear power window control unit LH or RH and rear power window motor LH or RH.
3. Check continuity between rear power window control unit LH or RH connector D209 (LH) or D309 (RH)
terminal 4 and rear power window motor LH or RH connector D204 (LH), D304 (RH) terminal 3.
OK or NG
OK >> Replace rear power window motor LH or RH.
NG >> Repair or replace harness.
Power Window Serial Link Check Rear LH or RHEIS00392
1. CHECK REAR POWER WINDOW SWITCH LH OR RH
1. Replace with operative rear power window control unit LH or RH.
2. Does window operate normally?
OK or NG
OK >> Replace rear power window control unit LH or RH.
NG >> GO TO 2.
2. CHECK POWER WINDOW SERIAL LINK CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect main power window and door lock/unlock switch and rear power window control unit LH or
RH.
3. Check continuity between main power window and door lock/unlock switch connector (A) D7 terminal 14
and rear power window control unit LH or RH connector (B) D209 (LH) or D309 (RH) terminal 1.
OK or NG
OK >> Replace main power window and door lock/unlock
switch.
NG >> Repair or replace harness.Rear LH
4 (Y/R) - 3 (Y/R) : Continuity should exist.
Rear RH
4 (Y/B) - 3 (Y/B) : Continuity should exist.
LIIA1389E
14 (LG/W) - 1 (W/V) : Continuity should exist.
LIIA2303E

POWER WINDOW SYSTEM
GW-65
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Revision: August 20072004 QX56
Rear Power Vent Window Switch Circuit CheckEIS002VB
1. CHECK REAR POWER VENT WINDOW SWITCH OPERATION
1. Turn ignition switch OFF.
2. Disconnect rear power vent window switch.
3. Check continuity between rear power vent window switch terminals 1, 3 and 4.
OK or NG
OK >> GO TO 2.
NG >> Replace rear power vent window switch.
2. CHECK REAR POWER VENT WINDOW SWITCH CIRCUIT HARNESS CONTINUITY
Check continuity between rear power vent window switch connector R103 terminal 1 and ground.
OK or NG
OK >> Rear power vent window switch circuit harness OK.
NG >> Repair or replace harness.
Rear Power Vent Window Motor LH Circuit CheckEIS002VC
1. CHECK REAR POWER VENT WINDOW LH SIGNAL
1. Turn ignition switch OFF.
2. Disconnect rear power vent window motor LH.
3. Turn ignition switch ON.
4. Check voltage between rear power vent window motor LH connector B52 terminal 1, 2 and ground.
OK or NG
OK >> Replace rear power vent window motor LH.
NG >> Repair or replace harness.
Te r m i n a l
Condition Continuity
(+) (–)
31Rear power vent win-
dow switch is pressed
OPEN.Ye s
41Rear power vent win-
dow switch is pressed
CLOSE.Ye s
LIIA0956E
1 (B) - Ground : Continuity should exist.
LIIA2045E
ConnectorTerminals (Wire color)
ConditionVoltage (V)
(Approx.)
(+) (-)
B521 (G)
GroundOpening Battery voltage
Closing 0
2 (Y)Opening 0
Closing Battery voltage
WIIA0290E