Nissan GT-R. Manual - part 270

SE-22

< DTC/CIRCUIT DIAGNOSIS >

HEATED SEAT RELAY

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace heated seat relay.

heated seat relay

Condition

Continuity

Terminal

3

5

12 V direct current supply between termi-
nals 1 and 2.

Existed

No current supply

Not existed

SEF497Y

HEAT SENSOR

SE-23

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HEAT SENSOR

Description

INFOID:0000000009162918

Detects seat cushion heater temperature and outputs to heated seat control unit.

Component Function Check

INFOID:0000000009162919

1.

CHECK FUNCTION

Check that heated seat warms to preset temperature when operating heated seat switch to the optimal posi-
tion.
Is the inspection result normal?

YES

>> Heat sensor function is OK.

NO

>> Refer to 

SE-23, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000009162920

1.

CHECK HEAT SENSOR INPUT SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between heated seat control unit harness connector and ground.

NOTE:
Voltage is repeated within the value shown as per the following list depending on heater unit temperature.

Is the inspection result normal?

YES

>> heat sensor is OK.

NO

>> GO TO 2.

2.

CHECK HEAT SENSOR CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect heated seat control unit connector and seat cushion heater connector.

3.

Check continuity between heated seat control unit harness connector and seat cushion heater harness
connector. 

4.

Check continuity between heated seat control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

3.

CHECK HEAT SENSOR POWER SUPPLY

1.

Turn ignition switch ON.

2.

Check voltage between seat cushion heater harness connector and ground.

(+)

(–)

Condition

Voltage (V)

(Approx.)

Heated seat control unit 

Connector

Terminal

B519

40

Ground

Heated seat switch

OFF

0

LO

10.87 – 11.02

HI

11.31 – 11.43

Heated seat control unit 

Seat cushion heater

Continuity 

Connector

Terminal

Connector

Terminal

B519

40

B518

40

Existed

Heated seat control unit 

Ground

Continuity 

Connector

Terminal

B519

40

Not existed

SE-24

< DTC/CIRCUIT DIAGNOSIS >

HEAT SENSOR

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK HEAT SENSOR POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect diode3 connector and heated seat control unit connector.

3.

Check continuity between diode3 harness connector and seat cushion heater harness connector. 

4.

Check continuity between seat cushion heater harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace harness.

5.

CHECK HEAT SENSOR

Check heat sensor. Refer to 

SE-24, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace seat cushion heater.

6.

CHECK INTERMITTENT INCIDENT

Check intermittent incident.
Refer to 

GI-38, "Intermittent Incident"

>> INSPECTION END

Component Inspection

INFOID:0000000009162921

1.

CHECK HEAT SENSOR

1.

Turn ignition switch OFF.

2.

Disconnect seat cushion heater connector.

3.

Check resistance between seat cushion heater terminals.

NOTE:
Resistance value changes according to temperature.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace seat cushion heater.

(+)

(–)

Condition

Voltage (V)

(Approx.)

Seat cushion heater

Connector

Terminal

B518

80

Ground

Heated seat switch

LO / HI

Battery voltage

Seat cushion heater

diode3

Continuity 

Connector

Terminal

Connector

Terminal

B518

80

B520

80

Existed

Seat cushion heater

Ground

Continuity 

Connector

Terminal

B518

80

Not existed

Seat cushion heater

Condition

Resistance

(K

Ω

)

(Approx.)

Terminal

40

80

When heat sensor temperature is 25

°

C (77

°

F)

9.9 – 10.2

SEAT CUSHION HEATER (DRIVER SIDE)

SE-25

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SEAT CUSHION HEATER (DRIVER SIDE)

Description

INFOID:0000000009162922

Warms the seat cushion.

Component Function Check

INFOID:0000000009162923

1.

CHECK FUNCTION

Check that heated seat warms to preset temperature when operating heated seat switch to the optimal posi-
tion.
Is the inspection result normal?

YES

>> Seat cushion heater function is OK.

NO

>> Refer to 

SE-25, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009162924

1.

CHECK SEAT CUSHION HEATER INPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect seat cushion heater connector.

3.

Turn ignition switch ON.

4.

Check voltage between seat cushion heater harness connector and ground.

NOTE:
Voltage is repeated within the value shown as per the following list depending on heater unit temperature.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK SEAT CUSHION HEATER CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect heated seat control unit connector.

3.

Check continuity between seat cushion heater harness connector and heated seat control unit harness
connector. 

4.

Check continuity between seat cushion heater harness connector and ground.

Is the inspection result normal?

YES

>> Replace heated seat control unit. 

NO

>> Repair or replace harness.

3.

CHECK SEAT CUSHION HEATER OUTPUT SIGNAL

1.

Turn ignition switch OFF.

(+)

(–)

Condition

Voltage (V)

(Approx.)

Seat cushion heater

Connector

Terminal

B518

41

Ground

Heated seat

Operates

0 – Battery voltage

Other than above

0

Seat cushion heater

Heated seat control unit

Continuity 

Connector

Terminal

Connector

Terminal

B518

41

B519

41

Existed

Seat cushion heater

Ground

Continuity 

Connector

Terminal

B518

41

Not existed