Nissan Pathfinder. Manual - part 1014

SE-54

< DTC/CIRCUIT DIAGNOSIS >

CLIMATE CONTROLLED SEAT SWITCH

4. Check continuity between climate controlled seat switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace harness.

3.

CHECK CLIMATE CONTROLLED SEAT SWITCH POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect climate controlled seat switch connector.

3. Turn ignition switch ON.

4. Check voltage between climate controlled seat switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK CLIMATE CONTROLLED SEAT SWITCH POWER SUPPLY CIRCUIT 

1. Turn ignition switch OFF.

2. Disconnect climate controlled seat control unit connector.

3. Check continuity between climate controlled seat switch harness connector and climate controlled seat

control unit harness connector. 

4. Check continuity between climate controlled seat switch harness connector and ground.

Is the inspection result normal?

Climate controlled seat switch

Climate controlled seat control unit

Continuity 

Connector

Terminal

Connector

Terminal

Driver side

COOL

M203

2

B204

20

Yes

HEAT

3

19

Passenger side

COOL

M206

2

B304

20

HEAT

3

19

Climate controlled seat switch

Ground

Continuity 

Connector

Terminal

Driver side

COOL

M203

2

No

HEAT

3

Passenger side

COOL

M206

2

HEAT

3

(+)

(–)

Voltage (V)

(Approx.)

Climate controlled seat switch

Connector

Terminal

Driver side

M203

1

Ground

12

Passenger side

M206

Climate controlled seat switch

Climate controlled seat control unit

Continuity 

Connector

Terminal

Connector

Terminal

Driver side

M203

1

B204

24

Yes

Passenger side

M206

B304

Climate controlled seat switch

Ground

Continuity 

Connector

Terminal

Driver side

M203

1

No

Passenger side

M206

CLIMATE CONTROLLED SEAT SWITCH

SE-55

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

K

L

M

A

B

SE

N

O

P

YES

>> Replace climate controlled seat control unit. Refer to 

SE-86, "Removal and Installation"

.

NO

>> Repair or replace harness.

5.

CHECK CLIMATE CONTROLLED SEAT SWITCH

Check climate controlled seat switch. 

Refer to 

SE-55, "Component Inspection"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-49, "Intermittent Incident"

.

NO

>> Replace climate controlled seat switch. Refer to 

IP-18, "Removal and Installation"

.

Component Inspection

INFOID:0000000009176475

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 

IP-18, "Removal and Installation"

.

Terminal

Condition

Continuity

2

1

Climate controlled seat switch

COOL mode

ON

Yes

OFF

No

3

HEAT  mode

ON

Yes

OFF

No

SE-56

< DTC/CIRCUIT DIAGNOSIS >

SEATBACK THERMAL ELECTRIC DEVICE

SEATBACK THERMAL ELECTRIC DEVICE

Component Function Check

INFOID:0000000009176476

1.

CHECK SEATBACK THERMAL ELECTRIC DEVICE FUNCTION

Check 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

>> Inspection End.

NO

>> Refer to 

SE-56, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009176477

Regarding Wiring Diagram information, refer to 

SE-37, "Wiring Diagram"

.

1.

CHECK SEATBACK THERMAL ELECTRIC DEVICE INPUT SIGNAL

1. Turn ignition switch ON.

2. Check voltage between seatback thermal electric device 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 device. Refer to 

SE-88, "Seatback Thermal Electric Device"

.

NO

>> GO TO 2.

2.

CHECK SEATBACK THERMAL ELECTRIC DEVICE CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect climate controlled seat control unit connector and seatback thermal electric device connector.

3. Check continuity between climate controlled seat control unit harness connector and seatback thermal

electric device harness connector. 

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

(+)

(–)

Condition

Voltage (V)

(Approx.)

Seatback thermal electric device

Connector

Terminal

Driver side

B212

1

Ground

Climate controlled seat 
switch

HEAT or COOL

0 - 12*

Other than above

0

2

HEAT or COOL

0 - 12*

Other than above

0

Passenger side

B309

1

Climate controlled seat 
switch

HEAT or COOL

0 - 12*

Other than above

0

2

HEAT or COOL

0 - 12*

Other than above

0

Climate controlled seat control unit

Seatback thermal electric device

Continuity 

Connector

Terminal

Connector

Terminal

Driver side

B205

28

B212

1

Yes

25

2

Passenger side

B305

28

B309

1

25

2

SEATBACK THERMAL ELECTRIC DEVICE

SE-57

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

K

L

M

A

B

SE

N

O

P

Is the inspection result normal?

YES

>> Replace climate controlled seat control unit. Refer to 

SE-86, "Removal and Installation"

.

NO

>> Repair or replace harness.

Climate controlled seat control unit

Ground

Continuity 

Connector

Terminal

Driver side

B205

28

No

25

Passenger side

B305

28

25