2011 INFINITI QX56 ignition

SE-74
< DTC/CIRCUIT DIAGNOSIS >
CLIMATE CONTROLLED SEAT SWITCH
YES >> Replace climate controlled seat control unit. Refer to SE-117, "CLIMATE CONTROLLED SEAT
UNIT : Disassembly and Assembly".
NO >> Repair or replace harness.
5.CHECK CLIMATE CONTROLLED SEAT SWITCH
Check climate controlled seat switch.
Refer to SE-74, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace climate controlled seat switch. Refer to SE-147, "
Removal and Installation".
6.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
Component InspectionINFOID:0000000006217393
1.CHECK CLIMATE CONTROLLED SEAT SWITCH
1. Turn ignition switch OFF.
2. Disconnect climate controlled seat switch connector.
3. Check the continuity between climate controlled seat switch terminals under the following terminals.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace climate controlled seat switch. Refer to SE-147, "
Removal and Installation".
Terminal Condition Continuity
2 1 Climate controlled seat switch COOL mode
ON Existed
OFF Not existed
3HEAT mode ON Existed
OFF Not existed
Revision: 2010 May2011 QX56

SEATBACK THERMAL ELECTRIC UNITSE-75
< DTC/CIRCUIT DIAGNOSIS >
C
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F
G H
I
K L
M A
B
SE
N
O P
SEATBACK THERMAL ELECTRIC UNIT
Component Function CheckINFOID:0000000006217394
1.CHECK SEATBACK THERMAL ELECTRIC UNIT FUNCTION
Check whether or not the temperatur e of the seatback thermal electric unit changes in accordance with the
HEAT or COOL switch operation of the climate controlled seat control switch.
Is the inspection result normal?
YES >> Seatback thermal electric unit function is OK.
NO >> Refer to SE-75, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006217395
1.CHECK SEATBACK THERMAL ELECTRIC UNIT INPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between seatback thermal electric unit harness connector and ground.
*:It changes between 12 and 0 V
NOTE:
Wait 1 minute or more after the activation start, and then start the measurement.
Is the inspection result normal?
YES >> Replace seatback thermal electric unit.
NO >> GO TO 2.
2.CHECK SEATBACK THERMAL ELECTRIC UNIT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect climate controlled seat control unit c onnector and seatback thermal electric unit connector.
3. Check continuity between climate controlled s eat control unit harness connector and seatback thermal
electric unit harness connector.
4. Check continuity between climate controll ed seat control unit harness connector and ground.
(+)
(–) Condition Voltage (V)
(Approx.)
Seatback thermal electric unit
Connector Terminal
Driver side B465 58
Ground Climate controlled seat
switch
HEAT or COOL 0 - 12*
Other than above 0
59 HEAT or COOL 0 - 12*
Other than above 0
Passenger side B439 58
Climate controlled seat
switch HEAT or COOL 0 - 12*
Other than above 0
59 HEAT or COOL 0 - 12*
Other than above 0
Climate controlled seat control unit Seatback thermal electric unit
Continuity
Connector Terminal Connector Terminal
Driver side B509 58
B465 58
Existed
59 59
Passenger side B519 58
B439 58
59 59
Revision: 2010 May2011 QX56

SEATBACK THERMAL ELECTRIC UNIT SENSORSE-77
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
SE
N
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SEATBACK THERMAL ELECTRIC UNIT SENSOR
Component Function CheckINFOID:0000000006217396
1.CHECK SEATBACK THERMAL ELECTRIC UNIT SENSOR FUNCTION
Check whether or not the temperatur e of the seatback thermal electric unit changes in accordance with the
HEAT or COOL switch operation of the climate controlled seat control switch.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Refer to SE-77, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006217397
1.CHECK SEATBACK THERMAL ELECTRIC UNIT SENSOR SIGNAL
1. Turn ignition switch ON.
2. Check voltage between seatback thermal electric unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK SEATBACK THERMAL ELECTRIC UNIT SENSOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect climate controlled seat control unit c onnector and seatback thermal electric unit connector.
3. Check continuity between climate controlled s eat control unit harness connector and seatback thermal
electric unit harness connector.
4. Check continuity between climate controll ed seat control unit harness connector and ground.
Is the inspection result normal?
YES >> Replace climate controlled seat control unit.
NO >> Repair or replace harness.
3.CHECK SEATBACK THERMAL ELECTRIC UNIT SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect climate controlled seat control unit c onnector and seatback thermal electric unit connector.
3. Check continuity between climate controlled s eat control unit harness connector and seatback thermal
electric unit harness connector.
(+)
(-) Condition Voltage (V)
(Approx.)
Seatback thermal electric unit
Connector Terminal
Driver side B465 61 GroundClimate controlled seat
operated
1 - 5
Passenger side B439
Climate controlled seat control unit Seatback thermal electric unit Continuity
Connector Terminal Connector Terminal
Driver side B507 61B465
61 Existed
Passenger side B517 B439
Climate controlled seat control unit GroundContinuity
Connector Terminal
Driver side B507 61 Not existed
Passenger side B517
Revision: 2010 May2011 QX56

SE-78
< DTC/CIRCUIT DIAGNOSIS >
SEATBACK THERMAL ELECTRIC UNIT SENSOR
4. Check continuity between climate controlled seat control unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace harness.
4.CHECK SEATBACK THERMAL ELECTRIC UNIT SENSOR
Check seatback thermal electric unit sensor.
Refer to SE-78, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace seatback thermal electric unit.
5.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
Component InspectionINFOID:0000000006217398
1.CHECK SEATBACK THERMAL ELECTRIC UNIT SENSOR
1. Turn ignition switch OFF.
2. Disconnect seatback thermal electric unit connector.
3. Check resistance between seatback thermal electric unit terminals.
* : When sensor temperature is 25 °C (77 °F).
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace seatback thermal electric unit. Refer to SE-117, "
CLIMATE CONTROLLED SEAT UNIT :
Disassembly and Assembly".
Climate controlled seat control unit Seatback thermal electric unit
Continuity
Connector Terminal Connector Terminal
Driver side B507 60B465
60 Existed
Passenger side B517 B439
Climate controlled seat control unit GroundContinuity
Connector Terminal
Driver side B507 60 Not existed
Passenger side B517
Seatback thermal electric unit Resistance
(KΩ)
(Approx.)
Te r m i n a l
60 61 1
*
Revision: 2010 May2011 QX56

SEAT CUSHION THERMAL ELECTRIC UNITSE-79
< DTC/CIRCUIT DIAGNOSIS >
C
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F
G H
I
K L
M A
B
SE
N
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SEAT CUSHION THERMAL ELECTRIC UNIT
Component Function CheckINFOID:0000000006217399
1.CHECK SEAT CUSHION THERMAL ELECTRIC UNIT FUNCTION
Check whether or not the temperature of the seat cush ion thermal electric unit changes in accordance with the
HEAT or COOL switch operation of the climate controlled seat control switch.
Is the inspection result normal?
YES >> Seatback thermal electric unit function is OK.
NO >> Refer to SE-79, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006217400
1.CHECK SEAT CUSHION THERMAL ELECTRIC UNIT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between seat cushion ther mal electric unit harness connector and ground.
*:It changes between 12 and 0 V
NOTE:
Wait 1 minute or more after the activation start, and then start the measurement.
Is the inspection result normal?
YES >> Replace seat cushion thermal electric unit.
NO >> GO TO 2.
2.CHECK SEAT CUSHION THERMAL ELECTRIC UNIT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect climate controlled seat control unit connec tor and seat cushion thermal electric unit connector.
3. Check continuity between climate controlled seat control unit harness connector and seat cushion thermal
electric unit harness connector.
4. Check continuity between climate controll ed seat control unit harness connector and ground.
(+)
(–) Condition Voltage (V)
(Approx.)
Seat cushion thermal electric unit
Connector Terminal
Driver side B505 67
Ground Climate controlled seat
switch
HEAT or COOL 0 - 12*
Other than above 0
68 HEAT or COOL 0 - 12*
Other than above 0
Passenger side B515 67
Climate controlled seat
switch HEAT or COOL 0 - 12*
Other than above 0
68 HEAT or COOL 0 - 12*
Other than above 0
Climate controlled seat control unit Seat cushion thermal electric unit
Continuity
Connector Terminal Connector Terminal
Driver side B509 67
B505 67
Existed
68 68
Passenger side B519 67
B515 67
68 68
Revision: 2010 May2011 QX56

SEAT CUSHION THERMAL ELECTRIC UNIT SENSORSE-81
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
SE
N
O P
SEAT CUSHION THERMAL ELECTRIC UNIT SENSOR
Component Function CheckINFOID:0000000006217401
1.CHECK SEAT CUSHION THERMAL ELECTRIC UNIT SENSOR FUNCTION
Check whether or not the temperature of the seat cush ion thermal electric unit changes in accordance with the
HEAT or COOL switch operation of the climate controlled seat control switch.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Refer to SE-81, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006217402
1.CHECK SEAT CUSHION THERMAL ELECTRIC UNIT SENSOR SIGNAL
1. Turn ignition switch ON.
2. Check voltage between seat cushion ther mal electric unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK SEAT CUSHION THERMAL ELECTRIC UNIT SENSOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect climate controlled seat control unit connec tor and seat cushion thermal electric unit connector.
3. Check continuity between climate controlled seat control unit harness connector and seat cushion thermal
electric unit harness connector.
4. Check continuity between climate controll ed seat control unit harness connector and ground.
Is the inspection result normal?
YES >> Replace climate controlled seat control unit.
NO >> Repair or replace harness.
3.CHECK SEAT CUSHION THERMAL ELEC TRIC UNIT SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect climate controlled seat control unit connec tor and seat cushion thermal electric unit connector.
3. Check continuity between climate controlled seat control unit harness connector and seat cushion thermal
electric unit harness connector.
(+)
(-) Condition Voltage (V)
(Approx.)
Seat cushion thermal electric unit
Connector Terminal
Driver side B505 70 GroundClimate controlled seat
operated
1 - 5
Passenger side B515
Climate controlled seat control unit Seat cushion thermal electric unit Continuity
Connector Terminal Connector Terminal
Driver side B509 70B505
70 Existed
Passenger side B519 B515
Climate controlled seat control unit GroundContinuity
Connector Terminal
Driver side B509 70 Not existed
Passenger side B519
Revision: 2010 May2011 QX56

SE-82
< DTC/CIRCUIT DIAGNOSIS >
SEAT CUSHION THERMAL ELECTRIC UNIT SENSOR
4. Check continuity between climate controlled seat control unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace harness.
4.CHECK SEAT CUSHION THERMAL ELECTRIC UNIT SENSOR
Check seat cushion thermal electric unit sensor.
Refer to SE-82, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace seat cushion thermal electric unit.
5.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
Component InspectionINFOID:0000000006217403
1.CHECK SEAT CUSHION THERMAL ELECTRIC UNIT SENSOR
1. Turn ignition switch OFF.
2. Disconnect seat cushion thermal electric unit connector.
3. Check resistance between seat cushion thermal electric unit terminals.
* : When sensor temperature is 25 °C (77 °F).
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace seat cushion thermal electric unit. Refer to SE-117, "
CLIMATE CONTROLLED SEAT
UNIT : Disassembly and Assembly".
Climate controlled seat control unit Seat cushion thermal electric unit
Continuity
Connector Terminal Connector Terminal
Driver side B509 70B505
70 Existed
Passenger side B519 B515
Climate controlled seat control unit GroundContinuity
Connector Terminal
Driver side B509 70 Not existed
Passenger side B519
Seat cushion thermal electric unit Resistance
(KΩ)
(Approx.)
Te r m i n a l
69 70 1
*
Revision: 2010 May2011 QX56

CLIMATE CONTROLLED SEATBACK BLOWER MOTORSE-83
< DTC/CIRCUIT DIAGNOSIS >
C
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M A
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CLIMATE CONTROLLED SEATBACK BLOWER MOTOR
Component Function CheckINFOID:0000000006217404
1.CHECK CLIMATE CONTROLLED SEA TBACK BLOWER MOTOR FUNCTION
When turning the climate controlled seat switch to the HEAT or COOL mode position, check that the climate
controlled seatback blower is operated in each specific mode.
Is the inspection result normal?
YES >> Climate controlled seatback blower motor is OK.
NO >> Refer to SE-83, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006217405
1.CHECK CLIMATE CONTROLLED SEATBAC K BLOWER MOTOR POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between climate controlled s eatback blower motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK CLIMATE CONTROLLE D SEATBACK BLOWER MOTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect climate controlled seatback blower moto r connector and climate controlled seat control unit
connector.
3. Check continuity between climate controlled seat back blower motor harness connector and climate con-
trolled seat control unit harness connector.
4. Check continuity between climate controlled seatback blower motor harness connector and ground.
Is the inspection result normal?
YES >> Replace climate controlled seat control unit. Refer to SE-117, "CLIMATE CONTROLLED SEAT
UNIT : Disassembly and Assembly".
NO >> Repair or replace harness.
(+)
(–) Condition Voltage (V)
(Approx.)
Climate controlled seatback blower motor
Connector Terminal
Driver side B466 62 GroundClimate controlled seat
switch
HEAT mode
12
COOL mode
Other than above 0
Passenger side B440 Climate controlled seat
switchHEAT mode
12
COOL mode
Other than above 0
Climate controlled seatback blower motor Climate controlled seat control unit Continuity
Connector Terminal Connector Terminal
Driver side B466 62B507
62 Existed
Passenger side B440 B517
Climate controlled seatback blower motor
GroundContinuity
Connector Terminal
Driver side B466 62 Not existed
Passenger side B440
Revision: 2010 May2011 QX56