Infiniti FX35, FX50 (S51). Manual - part 1626

SE-24

< DTC/CIRCUIT DIAGNOSIS >

SEAT CUSHION 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 seat cushion thermal electric device.

Seat cushion thermal electric device

Terminal

Resistance

(K

Ω

)

(Approx.)

Connector

Driver side

B505

33

34

1

Passenger side

B515

CLIMATE CONTROLLED SEAT BLOWER MOTOR

SE-25

< DTC/CIRCUIT DIAGNOSIS >

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CLIMATE CONTROLLED SEAT BLOWER MOTOR

Description

INFOID:0000000005236625

• Sends air flow to the seat cushion and seatback.

Component Function Check

INFOID:0000000005236626

1.

CHECK FUNCTION

When turning the climate controlled seat switch to the HEAT and COOL mode position, check that the climate
controlled seat blower is operated in each specific mode.
Is the inspection result normal?

YES

>> Climate controlled seat blower motor is OK.

NO

>> Refer to 

SE-25, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005236627

1.

CHECK CLIMATE CONTROLLED SEAT BLOWER MOTOR POWER SUPPLY

1.

Turn ignition switch ON.

2.

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK CLIMATE CONTROLLED BLOWER MOTOR POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

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

3.

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

4.

Check continuity between climate controlled seat blower motor 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.

(+)

(–)

Condition

Voltage (V)

(Approx.)

Climate controlled seat blower motor

Connector

Terminal

Driver side

B506

39

Ground

Climate controlled seat 
switch

HEAT mode

Battery voltage

COOL mode

Other than above

0

Passenger side

B516

Climate controlled seat 
switch

HEAT mode

Battery voltage

COOL mode

Other than above

0

Climate controlled seat blower motor

Climate controlled seat control unit

Continuity 

Connector

Terminal

Connector

Terminal

Driver side

B506

39

B507

39

Existed

Passenger side

B516

B517

Climate controlled seat blower motor

Ground

Continuity 

Connector

Terminal

Driver side

B506

39

Not existed

Passenger side

B516

SE-26

< DTC/CIRCUIT DIAGNOSIS >

CLIMATE CONTROLLED SEAT BLOWER MOTOR

3.

CHECK CLIMATE CONTROLLED SEAT BLOWER MOTOR SPEED CONTROL SIGNAL

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

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK CLIMATE CONTROLLED SEAT BLOWER MOTOR SPEED CONTROL SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat blower motor connector and climate controlled seat control unit con-
nector.

3.

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

4.

Check continuity between climate controlled seat blower motor 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.

5.

CHECK CLIMATE CONTROLLED SEAT BLOWER MOTOR GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

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

3.

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

4.

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

(+)

(–)

Condition

Voltage (V)

(Approx.)

Climate controlled seat blower motor

Connector

Terminal

Driver side

B506

40

Ground

Climate controlled seat 

HEAT mode

8.5 - 9

LO COOL

8

MID COOL

9

Passenger side

B516

HI COOL

12

Other than above

0

Climate controlled seat blower motor

Climate controlled seat control unit

Continuity 

Connector

Terminal

Connector

Terminal

Driver side

B506

40

B507

40

Existed

Passenger side

B516

B517

Climate controlled seat blower motor

Ground

Continuity 

Connector

Terminal

Driver side

B506

40

Not existed

Passenger side

B516

Climate controlled seat blower motor

Climate controlled seat control unit

Continuity 

Connector

Terminal

Connector

Terminal

Driver side

B506

41

B507

41

Existed

Passenger side

B516

B517

CLIMATE CONTROLLED SEAT BLOWER MOTOR

SE-27

< DTC/CIRCUIT DIAGNOSIS >

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Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace harness.

6.

CHECK CLIMATE CONTROLLED SEAT BLOWER MOTOR GROUND

1.

Connect climate controlled seat blower motor connector and climate controlled seat control unit connec-
tor.

2.

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

Is the inspection result normal?

YES

>> Replace climate controlled seat control unit. Refer to 

SE-85, "Disassembly and Assembly"

.

NO

>> Replace climate controlled seat blower motor. Refer to 

SE-85, "Disassembly and Assembly"

.

Climate controlled seat blower motor

Ground

Continuity 

Connector

Terminal

Driver side

B506

41

Not existed

Passenger side

B516

Climate controlled seat blower motor

Ground

Continuity 

 Connector

Terminal

Driver side

B506

41

Existed

Passenger side

B516