2011 INFINITI QX56 air condition

SE-66
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORK FLOW
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORK FLOW
Work FlowINFOID:0000000006217388
DETAILED FLOW
1.OBTAIN INFORMATION ABOUT SYMPTOM
Interview the customer to obtain the malfunction information (conditions and environment when the malfunc-
tion occurred) as much as possible when the customer brings the vehicle in.
>> GO TO 2.
2.REPRODUCE THE MALFUNCTION INFORMATION
Check the malfunction on the vehicle that the customer describes.
Inspect the relation of the symptoms and the condition when the symptoms occur.
>> GO TO 3.
3.IDENTIFY THE MALFUNCTIONING SYS TEM WITH “SYMPTOM DIAGNOSIS”
Use “Symptom diagnosis” from the symptom inspection re sult in step 2 and then identify where to start per-
forming the diagnosis based on possible causes and symptoms.
>> GO TO 4.
4.IDENTIFY THE MALFUNCTIONING PART S WITH “COMPONENT DIAGNOSIS”
Perform the diagnosis with “Component diagnosis” of the applicable system.
>> GO TO 5.
5.REPAIR OR REPLACE THE MALFUNCTIONING PARTS
Repair or replace the specified malfunctioning parts.
>> GO TO 6.
6.FINAL CHECK
Check that malfunctions are not reproduced when obtaini ng the malfunction information from the customer,
referring to the symptom inspection result in step 2.
Are the malfunctions corrected?
YES >> INSPECTION END
NO >> GO TO 3.
Revision: 2010 May2011 QX56

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 UNIT SENSORSE-77
< DTC/CIRCUIT DIAGNOSIS >
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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

SEAT CUSHION THERMAL ELECTRIC UNIT SENSORSE-81
< DTC/CIRCUIT DIAGNOSIS >
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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

CLIMATE CONTROLLED SEATBACK BLOWER MOTORSE-83
< DTC/CIRCUIT DIAGNOSIS >
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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

SE-84
< DTC/CIRCUIT DIAGNOSIS >
CLIMATE CONTROLLED SEATBACK BLOWER MOTOR
3.CHECK CLIMATE CONTROLLED SEATBACK BLOWER MOTOR SPEED CONTROL SIGNAL
Check voltage between climate controlled seat back blower motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.CHECK CLIMATE CONTROLLED SEATBACK BLOWER MOTOR SPEED CONTROL SIGNAL 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.
5.CHECK CLIMATE CONTROLLED SEATBACK BLOWER MOTOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect climate controlled seatback blower moto r 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.
(+)
(–) Condition Voltage (V)
(Approx.)
Climate controlled seatback blower motor
Connector Terminal
Driver side B466 63 GroundClimate controlled seat
switch
HEAT 5.5 - 8
COOL
HI 11.2
MID 8
LO 6.5
Other than above 0
Passenger side B440 Climate controlled seat
switchHEAT 5.5 - 8
COOL
HI 11.2
MID 8
LO 6.5
Other than above 0
Climate controlled seatback blower motor Climate controlled seat control unit Continuity
Connector Terminal Connector Terminal
Driver side B466 63B507
63 Existed
Passenger side B440 B517
Climate controlled seatback blower motor
GroundContinuity
Connector Terminal
Driver side B466 63 Not existed
Passenger side B440
Revision: 2010 May2011 QX56

SE-86
< DTC/CIRCUIT DIAGNOSIS >
CLIMATE CONTROLLED SEAT CUSHION BLOWER MOTOR
CLIMATE CONTROLLED SEAT CUSHION BLOWER MOTOR
Component Function CheckINFOID:0000000006217406
1.CHECK CLIMATE CONTROLLED SEAT CUSHION BLOWER MOTOR FUNCTION
When turning the climate controlled seat switch to the HEAT or COOL mode position, check that the climate
controlled seat cushion blower is operated in each specific mode.
Is the inspection result normal?
YES >> Climate controlled seat cushion blower motor is OK.
NO >> Refer to SE-86, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006217407
1.CHECK CLIMATE CONTROLLED SEAT CUSHION BLOWER MOTOR POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between climate controlled seat cushion blower motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK CLIMATE CONTROLLED SEAT CUSHION BLOWER MOTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect climate controlled seat cushion blower motor connector and climate controlled seat control
unit connector.
3. Check continuity between climate controlled seat cushion blower motor harness connector and climate
controlled seat control unit harness connector.
4. Check continuity between climate controlled s eat cushion 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 seat cushion blower motor
Connector Terminal
Driver side B506 71 GroundClimate controlled seat
switch
HEAT mode
12
COOL mode
Other than above 0
Passenger side B516 Climate controlled seat
switchHEAT mode
12
COOL mode
Other than above 0
Climate controlled seat cushion blower motor Climate controlled seat control unit Continuity
Connector Terminal Connector Terminal
Driver side B506 71B507
71 Existed
Passenger side B516 B517
Climate controlled seat cushion blower motor
GroundContinuity
Connector Terminal
Driver side B506 71 Not existed
Passenger side B516
Revision: 2010 May2011 QX56

CLIMATE CONTROLLED SEAT CUSHION BLOWER MOTORSE-87
< DTC/CIRCUIT DIAGNOSIS >
C
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3.CHECK CLIMATE CONTROLLED SEAT CUSHION BLOWER MOTOR SPEED CONTROL SIGNAL
Check voltage between climate controlled seat cushion blower motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.CHECK CLIMATE CONTROLLED SEAT CUSHION BL OWER MOTOR SPEED CONTROL SIGNAL CIR-
CUIT
1. Turn ignition switch OFF.
2. Disconnect climate controlled seat cushion blower motor connector and climate controlled seat control
unit connector.
3. Check continuity between climate controlled seat cushion blower motor harness connector and climate
controlled seat control unit harness connector.
4. Check continuity between climate controlled s eat cushion 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.
5.CHECK CLIMATE CONTROLLED SEAT CUSHI ON BLOWER MOTOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect climate controlled seat cushion blower motor and climate controlled seat control unit connec-
tor.
3. Check continuity between climate controlled seat cushion blower motor harness connector and climate
controlled seat control unit harness connector.
(+)
(–) Condition Voltage (V)
(Approx.)
Climate controlled seat cushion blower motor
Connector Terminal
Driver side B506 72 GroundClimate controlled seat
switch
HEAT 5.5 - 8
COOL
HI 9.2
MID 8
LO 6.5
Other than above 0
Passenger side B516 Climate controlled seat
switchHEAT 5.5 - 8
COOL
HI 9.2
MID 8
LO 6.5
Other than above 0
Climate controlled seat cushion blower motor Climate controlled seat control unit Continuity
Connector Terminal Connector Terminal
Driver side B506 72B507
72 Existed
Passenger side B516 B517
Climate controlled seat cushion blower motor
GroundContinuity
Connector Terminal
Driver side B506 72 Not existed
Passenger side B516
Revision: 2010 May2011 QX56