ignition INFINITI QX56 2004 Factory Service Manual

POWER WINDOW SYSTEM
GW-61
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Revision: August 20072004 QX56
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

GW-66
POWER WINDOW SYSTEM
Revision: August 20072004 QX56
Rear Power Vent Window Motor RH Circuit CheckEIS002VD
1. CHECK REAR POWER VENT WINDOW SWITCH RH SIGNAL
1. Turn ignition switch OFF.
2. Disconnect rear power vent window motor RH.
3. Turn ignition switch ON.
4. Check voltage between rear power vent window motor RH connector B150 terminal 1, 2 and ground.
OK or NG
OK >> Replace rear power vent window motor RH.
NG >> Repair or replace harness.
Rear Power Vent Window Relay (OPEN) CheckEIS002VE
1. CHECK REAR POWER VENT WINDOW RELAY (OPEN) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear power vent window relay (OPEN).
3. Turn ignition switch ON.
4. Check voltage between rear power vent window relay (OPEN) connector and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.
2. CHECK REAR POWER VENT WINDOW RELAY (OPEN)
Check continuity between rear power vent window relay (OPEN) terminals 3 and 4, 3 and 5.
OK or NG
OK >> GO TO 3.
NG >> Replace rear power vent window relay (OPEN).
ConnectorTerminals (Wire color)
ConditionVoltage (V)
(Approx.)
(+) (-)
B1501 (BR)
GroundOpening Battery voltage
Closing 0
2 (R)Opening 0
Closing Battery voltage
WIIA0290E
ConnectorTerminals (Wire color)
Voltage (V)
(Approx.)
(+) (-)
M871 (W/L)
Ground Battery voltage
5 (W/R)
LIIA1565E
Terminal Condition Continuity
3412V direct current supply
between terminals 1 and 2No
No current supply Yes
3512V direct current supply
between terminals 1 and 2Ye s
No current supply No
WIIA0291E

POWER WINDOW SYSTEM
GW-67
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Revision: August 20072004 QX56
3. CHECK REAR POWER VENT WINDOW RELAY (OPEN) GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between rear power vent window relay (OPEN)
connector M87 terminal 4 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
4. CHECK REAR POWER VENT WINDOW RELAY (OPEN) CIRCUIT
1. Disconnect rear power vent window switch.
2. Check continuity between rear power vent window relay (OPEN)
connector M87 terminal 2 and rear power vent window switch
connector R103 terminal 3.
OK or NG
OK >> Replace rear power vent window switch.
NG >> Repair or replace harness.
Rear Power Vent Window Relay (CLOSE) CheckEIS002VF
1. CHECK REAR POWER VENT WINDOW RELAY (CLOSE) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear power vent window relay (CLOSE).
3. Turn ignition switch ON.
4. Check voltage between rear power vent window relay (CLOSE) connector and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.4 (B) - Ground : Continuity should exist.
LIIA1567E
2 (G/R) - 3 (BR/W) : Continuity should exist.
LIIA1568E
ConnectorTerminals (Wire color)
Voltage (V)
(Approx.)
(+) (-)
M891 (W/L)
Ground Battery voltage
5 (W/R)
LIIA1565E

GW-68
POWER WINDOW SYSTEM
Revision: August 20072004 QX56
2. CHECK REAR POWER VENT WINDOW RELAY (CLOSE)
Check continuity between rear power vent window relay (CLOSE) terminals 3 and 4, 3 and 5.
OK or NG
OK >> GO TO 3.
NG >> Replace rear power vent window relay (CLOSE).
3. CHECK REAR POWER VENT WINDOW RELAY (CLOSE) GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between rear power vent window relay
(CLOSE) connector M89 terminal 4 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
4. CHECK REAR POWER VENT WINDOW RELAY (CLOSE) CIRCUIT
1. Disconnect rear power vent window switch.
2. Check continuity between rear power vent window relay (CLOSE) connector M89 terminal 2 and rear
power vent window switch R103 terminal 4.
OK or NG
OK >> Replace rear power vent window switch.
NG >> Repair or replace harness.
Terminal Condition Continuity
3412V direct current supply
between terminals 1 and 2No
No current supply Yes
3512V direct current supply
between terminals 1 and 2Ye s
No current supply No
WIIA0291E
4 (B) - Ground : Continuity should exist.
LIIA1567E
2 (R/G) - 4 (V/W) : Continuity should exist.
LIIA1569E

REAR WINDOW DEFOGGER
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Revision: August 20072004 QX56
System DescriptionEIS002VN
The rear window defogger system is controlled by BCM (body control module) and IPDM E/R (intelligent
power distribution module engine room).
The rear window defogger operates only for approximately 15 minutes.
Power is supplied at all times

through 15A fuses (No. 43, 46, and 47, located in the IPDM E/R)

to rear window defogger relay terminals 3 and 6 (located in the IPDM E/R)

through 50A fusible link (letter f , located in the fuse and fusible link box)

to BCM terminal 70.
With the ignition switch turned to ON or START position,
Power is supplied

through ignition switch

to rear window defogger relay (located in the IPDM E/R)

through 10A fuse (No. 59, located in the fuse and relay box)

to BCM terminal 38

through 10A fuse [No. 8, located in the fuse block (J/B)]

to front air control terminal 14.
Ground is supplied

to BCM terminal 67

to front air control terminal 1

through body grounds M57, M61 and M79

to IPDM E/R terminals 38 and 59

through body grounds E9, E15 and E24.
When front air control (rear window defogger switch) is turned to ON,
Ground is supplied

to BCM terminal 9

through front air control terminal 11

through front air control terminal 1

through body grounds M57, M61 and M79.
Then rear window defogger switch is illuminated.
Then BCM recognizes that rear window defogger switch is turned to ON.
Then it sends rear window defogger switch signals to IPDM E/R and display control unit via DATA LINE (CAN-
H, CAN-L).
When display control unit receives rear window defogger switch signals, and displays on the screen.
When IPDM E/R receives rear window defogger switch signals,
Ground is supplied

to rear window defogger relay (located in the IPDM E/R)

through IPDM E/R terminal 38

through IPDM E/R terminal 59

through body grounds E9, E15 and E24.
Then rear window defogger relay is energized.
With power and ground supplied, rear window defogger filaments heat and defog the rear window.
When rear window defogger relay is turned to ON,
Power is supplied

through heated mirror relay (located in the IPDM E/R)

through IPDM E/R terminal 23

to door mirror defogger (LH and RH) terminal 10.
Door mirror defogger (LH and RH) is grounded through body grounds M57, M61 and M79.
With power and ground supplied, rear window defogger filaments heat and defog the rear window and door
mirror defogger filaments heat and defog the mirror.

REAR WINDOW DEFOGGER
GW-85
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Revision: August 20072004 QX56
Terminal and Reference Value for BCMEIS002VR
Terminal and Reference Value for IPDM E/REIS002VS
Work FlowEIS002VT
1. Check the symptom and customer's requests.
2. Understand the outline of system. Refer to GW-79, "
System Description" .
3. According to the trouble diagnosis chart, repair or replace the cause of the malfunction. Refer to GW-87,
"Trouble Diagnoses Symptom Chart" .
4. Does rear window defogger operate normally? YES: GO TO 5, NO: GO TO 3.
5. Inspection end.
Terminal Wire color Item ConditionVoltage (V)
(Approx.)
9Y/BRear window defogger
switch signalWhen rear window defogger switch is pressed. 0
When rear window defogger switch is OFF. 5
38 W/L Ignition switch ON or START Ignition switch (ON or START position) Battery voltage
39 W CAN-H — —
40 R CAN-L — —
67 B Ground — 0
70 W/B Battery power supply — Battery voltage
Terminal Wire color Item ConditionVoltage (V)
(Approx.)
38 B Ground (Power) — 0
39 W CAN-H — —
40 R CAN-L — —
59 B Ground (Signal) — 0
60 BRear window defogger output
signalWhen rear window defogger switch is ON. Battery voltage
When rear window defogger switch is OFF. 0