Nissan GT-R. Instruction — 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
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
I
K
L
M
A
B
SE
N
O
P
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
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
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
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
I
K
L
M
A
B
SE
N
O
P
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
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
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