Infiniti FX35, FX50 (S51). Manual — part 1625

SE-20

< DTC/CIRCUIT DIAGNOSIS >

SEATBACK THERMAL ELECTRIC DEVICE SENSOR

Is the inspection result normal?

YES

>> Replace climate controlled seat control unit. Refer to

SE-84, "Removal and Installation"

.

NO

>> Replace seatback thermal electric device.

SEAT CUSHION THERMAL ELECTRIC DEVICE

SE-21

< DTC/CIRCUIT DIAGNOSIS >

C

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N

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SEAT CUSHION THERMAL ELECTRIC DEVICE

Description

INFOID:0000000005236620

Installed in the seat cushion backside and heats or cools the airflow from the climate controlled seat blower
motor in accordance with the control from the climate controlled seat control unit.

Component Function Check

INFOID:0000000005236621

1.

CHECK FUNCTION

Checks whether or not the temperature of the seatback thermal electric device changes in accordance with
the HEAT or COOL switch operation of the climate controlled seat control switch.

Is the inspection result normal?

YES

>> Seatack thermal device function is OK.

NO

>> Refer to

SE-17, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005236622

1.

CHECK SEAT CUSHION THERMAL ELECTRIC DEVICE SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between seat cushion thermal electric device harness connector and ground.

*:It changes between battery voitage or 0V

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 device.

NO

>> GO TO 2.

2.

CHECK SEAT CUSHION THERMAL ELECTRIC DEVICE CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat control unit connector and seat cushion thermal electric device con-
nector.

3.

Check continuity between climate controlled seat control unit harness connector and seat cushion thermal
electric device harness connector.

(+)

(–)

Condition

Voltage (V)

(Approx.)

Seat cushion thermal electric device

Connector

Terminal

Driver side

B505

31

Ground

Climate con-
trolled seat
switch

HEAT and COOL

0 - battery voltage*

Other than above

0

32

HEAT and COOL

0 - battery voltage*

Other than above

0

Passenger side

B515

31

Climate con-
trolled seat
switch

HEAT and COOL

0 - battery voltage*

Other than above

0

32

HEAT and COOL

0 - battery voltage*

Other than above

0

Climate controlled seat control unit

Seat cushion thermal electric device

Continuity

Connector

Terminal

Connector

Terminal

Driver side

B509

31

B505

31

Existed

32

32

Passenger side

B519

31

B515

31

32

32

SE-22

< DTC/CIRCUIT DIAGNOSIS >

SEAT CUSHION THERMAL ELECTRIC DEVICE

4.

Check continuity between climate controlled seat control unit harness connector and ground.

Is the inspection result normal?

YES

>> Replace climate controlled seat control unit. Refer to

SE-85, "Disassembly and Assembly"

.

NO

>> Repair or replace harness.

Climate controlled seat control unit

Ground

Continuity

Connector

Terminal

Driver side

B509

31

Not existed

32

Passenger side

B519

31

32

SEAT CUSHION THERMAL ELECTRIC DEVICE SENSOR

SE-23

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

K

L

M

A

B

SE

N

O

P

SEAT CUSHION THERMAL ELECTRIC DEVICE SENSOR

Description

INFOID:0000000005236623

Measures seat cushion temperature.

Diagnosis Procedure

INFOID:0000000005236624

1.

CHECK SEAT CUSHION THERMAL ELECTRIC DEVICE SENSOR CIRCUIT

1.

Turn ignition switch ON.

2.

Check voltage between climate controlled seat control unit harness connector and ground.

Is the inspection result normal?

YES

>> Seat cushion thermal electric device sensor circuit is OK.

NO

>> GO TO 2.

2.

CHECK SEAT CUSHION THERMAL ELECTRIC DEVICE SENSOR HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat control unit connector and seat cushion thermal electric device con-
nector.

3.

Check continuity between climate controlled seat control unit harness connector and seat cushion thermal
electric device harness connector.

4.

Check continuity between font ventilation seat control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

3.

CHECK SEAT CUSHION THERMAL ELECTRIC DEVICE SENSOR

Check resistance between seat cushion thermal electric device connector.

(+)

(–)

Condition

Voltage (V)

(Approx.)

Climate controlled seat control unit

Connector

Terminal

Driver side

B507

34

Ground

Climate controlled seat operated

1 - 5

Passenger side

B517

Climate controlled seat control unit

Seat cushion thermal electric device

Continuity

Connector

Terminal

Connector

Terminal

Driver side

B507

33

B505

33

Existed

34

34

Passenger side

B517

33

B515

33

34

34

Climate controlled seat control unit

Ground

Continuity

Connector

Terminal

Driver side

B507

33

Not existed

34

Passenger side

B517

33

34