Infiniti QX56 (Z62). Manual - part 1133

SE-70

< DTC/CIRCUIT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace harness or connector.

5.

CHECK CLIMATE CONTROLLED SEAT RELAY GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check continuity between climate controlled seat relay harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace harness.

6.

CHECK CLIMATE CONTROLLED SEAT RELAY

Check climate controlled seat relay.
Refer to 

SE-70, "CLIMATE CONTROLLED SEAT CONTROL UNIT : Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace climate controlled seat relay.

7.

CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT (PASSENGER SIDE) GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check continuity between harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair harness or connector.

8.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

CLIMATE CONTROLLED SEAT CONTROL UNIT : Component Inspection

INFOID:0000000006217390

1.

CHECK CLIMATE CONTROLLED SEAT RELAY

1.

Turn ignition switch OFF.

2.

Remove climate controlled seat relay.

(+)

(

−

)

Voltage (V)

(Approx.)

Climate controlled seat relay

Connector

Terminal

E18

2

Ground

Battery voltage

5

Climate controlled seat relay

Ground

Continuity

Connector

Terminal

E18

1

Existed

Climate controlled seat control unit (passenger side)

Ground

Continuity

Connector

Terminal

B519

43

Existed

POWER SUPPLY AND GROUND CIRCUIT

SE-71

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

K

L

M

A

B

SE

N

O

P

3.

Check the continuity between climate controlled seat relay ter-
minals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END.

NO

>> Replace climate controlled seat relay.

Terminal

Condition

Continuity

3

5

12 V direct current supply between ter-
minals 1 and 2.

Existed

No current supply

Not existed

6

7

12 V direct current supply between ter-
minals 1 and 2.

Existed

No current supply

Not existed

JMJIA2104ZZ

SE-72

< DTC/CIRCUIT DIAGNOSIS >

CLIMATE CONTROLLED SEAT SWITCH

CLIMATE CONTROLLED SEAT SWITCH

Component Function Check

INFOID:0000000006217391

1.

CHECK CLIMATE CONTROLLED SEAT SWITCH FUNCTION

Check that climate controlled seat activates when operating climate controlled seat control switch.
Is the inspection result normal?

YES

>> Climate controlled seat switch is OK.

NO

>> Refer to 

SE-72, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006217392

1.

CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT INPUT SIGNAL

1.

Turn ignition switch ON.

2.

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

Is the inspection result normal?

YES

>> Climate controlled seat switch circuit is OK.

NO-1 HEAT or COOL mode is NG>>GO TO 2.
NO-2 HEAT and COOL modes are NG>>GO TO 3.

2.

CHECK CLIMATE CONTROLLED SEAT SWITCH CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat switch connector and climate controlled seat control unit connector.

3.

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

(+)

(–)

Condition

Voltage (V)

(Approx.)

Climate controlled seat control unit

Connector

Terminal

Driver side

B508

54

Ground

Climate controlled seat 
switch (driver side)

COOL

HI  

2.6 - 4.2

MID 1.6 

- 

2.5

LO 0.8 

- 

1.5

OFF

0

55

HEAT

HI 2.6 

- 

4.2

MID 1.6 

- 

2.5

LO 0.8 

- 

1.5

OFF

0

Passenger side

B518

54

Climate controlled seat 
switch (passenger seat)

COOL

HI  

2.6 - 4.2

MID 1.6 

- 

2.5

LO 0.8 

- 

1.5

OFF

0

55

HEAT

HI 2.6 

- 

4.2

MID 1.6 

- 

2.5

LO 0.8 

- 

1.5

OFF

0

CLIMATE CONTROLLED SEAT SWITCH

SE-73

< 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 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 cotrolled seat control unit

Continuity 

Connector

Terminal

Connector

Terminal

Driver side

COOL

M38

2

B508

54

Existed

HEAT

3

55

Passenger side

COOL

M39

2

B518

54

HEAT

3

55

Climate controlled seat switch

Ground

Continuity 

Connector

Terminal

Driver side

COOL

M38

2

Not existed

HEAT

3

Passenger side

COOL

M39

2

HEAT

3

(+)

(–)

Voltage (V)

(Approx.)

Climate controlled seat switch

Connector

Terminal

Driver side

M38

1

Ground

12

Passenger side

M39

Climate controlled seat switch

Climate cotrolled seat control unit

Continuity 

Connector

Terminal

Connector

Terminal

Driver side

M38

1

B508

52

Existed

Passenger side

M39

B518

Climate controlled seat switch

Ground

Continuity 

Connector

Terminal

Driver side

M38

1

Not existed

Passenger side

M39