Infiniti QX56 (Z62). Manual - part 1136

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 Inspection

INFOID: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

70

B505

70

Existed

Passenger side

B519

B515

Climate controlled seat control unit

Ground

Continuity 

Connector

Terminal

Driver side

B509

70

Not existed

Passenger side

B519

Seat cushion thermal electric unit

Resistance

(K

Ω

)

(Approx.)

Terminal

69

70

1

*

CLIMATE CONTROLLED SEATBACK BLOWER MOTOR

SE-83

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

K

L

M

A

B

SE

N

O

P

CLIMATE CONTROLLED SEATBACK BLOWER MOTOR

Component Function Check

INFOID:0000000006217404

1.

CHECK CLIMATE CONTROLLED SEATBACK 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 Procedure

INFOID:0000000006217405

1.

CHECK CLIMATE CONTROLLED SEATBACK BLOWER MOTOR POWER SUPPLY

1.

Turn ignition switch ON.

2.

Check voltage between climate controlled seatback blower motor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK CLIMATE CONTROLLED SEATBACK BLOWER MOTOR POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seatback blower motor connector and climate controlled seat control unit
connector.

3.

Check continuity between climate controlled seatback 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

Ground

Climate controlled seat 
switch

HEAT mode

12

COOL mode

Other than above

0

Passenger side

B440

Climate controlled seat 
switch

HEAT 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

62

B507

62

Existed

Passenger side

B440

B517

Climate controlled seatback blower motor

Ground

Continuity 

Connector

Terminal

Driver side

B466

62

Not existed

Passenger side

B440

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 seatback 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 motor connector and climate controlled seat control unit
connector.

3.

Check continuity between climate controlled seatback 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 motor and climate controlled seat control unit connector.

3.

Check continuity between climate controlled seatback 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

Ground

Climate 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 
switch

HEAT

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

63

B507

63

Existed

Passenger side

B440

B517

Climate controlled seatback blower motor

Ground

Continuity 

Connector

Terminal

Driver side

B466

63

Not existed

Passenger side

B440

CLIMATE CONTROLLED SEATBACK BLOWER MOTOR

SE-85

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

K

L

M

A

B

SE

N

O

P

4.

Check continuity between climate controlled seatback blower motor harness connector and ground.

Is the inspection result normal?

YES

>> Replace climate controlled seatback blower motor. Refer to 

SE-117, "CLIMATE CONTROLLED

SEAT UNIT : Disassembly and Assembly"

.

NO

>> Repair or replace harness.

Climate controlled seatback blower motor

Climate controlled seat control unit

Continuity 

Connector

Terminal

Connector

Terminal

Driver side

B466

64

B507

64

Existed

Passenger side

B440

B517

Climate controlled seatback blower motor

Ground

Continuity 

Connector

Terminal

Driver side

B466

64

Not existed

Passenger side

B440