Infiniti QX56 (Z62). Manual - part 1135

 

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Infiniti QX56 (Z62). Manual - part 1135

 

 

SE-78

< DTC/CIRCUIT DIAGNOSIS >

SEATBACK 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 SEATBACK THERMAL ELECTRIC UNIT SENSOR

Check seatback thermal electric unit sensor. 
Refer to 

SE-78, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace seatback thermal electric unit.

5.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000006217398

1.

CHECK SEATBACK THERMAL ELECTRIC UNIT SENSOR

1.

Turn ignition switch OFF.

2.

Disconnect seatback thermal electric unit connector.

3.

Check resistance between seatback thermal electric unit terminals.

*

 : When sensor temperature is 25

°

C (77

°

F).

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace seatback thermal electric unit. Refer to 

SE-117, "CLIMATE CONTROLLED SEAT UNIT :

Disassembly and Assembly"

.

Climate controlled seat control unit

Seatback thermal electric unit

Continuity 

Connector

Terminal

Connector

Terminal

Driver side

B507

60

B465

60

Existed

Passenger side

B517

B439

Climate controlled seat control unit

Ground

Continuity 

Connector

Terminal

Driver side

B507

60

Not existed

Passenger side

B517

Seatback thermal electric unit

Resistance

(K

)

(Approx.)

Terminal

60

61

1

*

SEAT CUSHION THERMAL ELECTRIC UNIT

SE-79

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

K

L

M

A

B

SE

N

O

P

SEAT CUSHION THERMAL ELECTRIC UNIT

Component Function Check

INFOID:0000000006217399

1.

CHECK SEAT CUSHION THERMAL ELECTRIC UNIT FUNCTION

Check whether or not the temperature of the seat cushion 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

>> Seatback thermal electric unit function is OK.

NO

>> Refer to 

SE-79, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006217400

1.

CHECK SEAT CUSHION THERMAL ELECTRIC UNIT SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between seat cushion thermal electric unit 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 seat cushion thermal electric unit.

NO

>> GO TO 2.

2.

CHECK SEAT CUSHION THERMAL ELECTRIC UNIT CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat control unit connector 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 controlled seat control unit harness connector and ground.

(+)

(–)

Condition

Voltage (V)

(Approx.)

Seat cushion thermal electric unit

Connector

Terminal

Driver side

B505

67

Ground

Climate controlled seat 
switch

HEAT or COOL

0 - 12*

Other than above

0

68

HEAT or COOL

0 - 12*

Other than above

0

Passenger side

B515

67

Climate controlled seat 
switch

HEAT or COOL

0 - 12*

Other than above

0

68

HEAT or COOL

0 - 12*

Other than above

0

Climate controlled seat control unit

Seat cushion thermal electric unit

Continuity 

Connector

Terminal

Connector

Terminal

Driver side

B509

67

B505

67

Existed

68

68

Passenger side

B519

67

B515

67

68

68

SE-80

< DTC/CIRCUIT DIAGNOSIS >

SEAT CUSHION THERMAL ELECTRIC UNIT

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.

Climate controlled seat control unit

Ground

Continuity 

Connector

Terminal

Driver side

B509

67

Not existed

68

Passenger side

B519

67

68

SEAT CUSHION THERMAL ELECTRIC UNIT SENSOR

SE-81

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

K

L

M

A

B

SE

N

O

P

SEAT CUSHION THERMAL ELECTRIC UNIT SENSOR

Component Function Check

INFOID:0000000006217401

1.

CHECK SEAT CUSHION THERMAL ELECTRIC UNIT SENSOR FUNCTION

Check whether or not the temperature of the seat cushion 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 Procedure

INFOID:0000000006217402

1.

CHECK SEAT CUSHION THERMAL ELECTRIC UNIT SENSOR SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between seat cushion thermal 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 connector 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 controlled 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 ELECTRIC UNIT SENSOR GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat control unit connector 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

Ground

Climate 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

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

 

 

 

 

 

 

 

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