Infiniti F50. Manual — part 787
HEATED SEAT
SE-139
C
D
E
F
G
H
J
K
L
M
A
B
SE
Terminals and Reference Values for Rear Power Seat Control Unit LH and RH
EIS00153
Work Flow
EIS003VU
1.
Check the symptom and customer's requests.
2.
Understand the outline of system. Refer to
3.
According to the trouble diagnosis chart, repair or replace the cause of the malfunction. Refer to
"Trouble Diagnoses Symptom Chart"
4.
Does heated seat operate normally? YES: GO TO 5, NO: GO TO 3.
5.
INSPECTION END.
TER-
MINAL
WIRE
COLOR
ITEM
Ignition
switch
CONDITION
Voltage (V)
(Approx.)
2
G
BAT power supply
ON
—
Battery voltage
5
BR
Heater Hi signal
Heater Hi operation
Battery voltage
Other than above
0
8
OR
Heater Lo signal
Heater Lo operation
Battery voltage
—
0
Other than above
0
15
B
Ground
—
0
20
W/B
Heater indicator Hi signal
Heater Hi operation (lit)
1
Other than above
Battery voltage
22
L/W
Heater switch–Hi signal
Heater switch (Hi) –ON (pressed)
0
Heater switch (Hi)–OFF
5
26
Y/B
Heater indicator Lo signal
Heater Lo operation (lit)
1
Other than above
Battery voltage
32
LG/W
Heater switch–Lo signal
Heater switch (Lo)–ON (pressed)
0
Heater switch (Lo)–OFF
Battery voltage
44
GY/B
IGN power supply
—
Battery voltage
SE-140
HEATED SEAT
Trouble Diagnoses Symptom Chart
EIS003VV
●
Check that other systems using the signal of the following systems operate normally.
Symptom
Diagnoses / service procedure
Refer to page
Front heated seat driver side, passenger side and rear heated
seat LH, RH do not operate.
Heated seat power supply circuit inspection.
Front heated seat driver side and passenger side do not oper-
ate but the rear heated seat is operated.
Heated seat power supply circuit inspection.
Front heated seat driver side or passenger side does not oper-
ate.
Front heated seat switch inspection.
Front heated seat driver side or passenger side do not operate
with LOW position and, seat cushion is not heated with HIGH
position.
Front heated seat circuit inspection 1.
Front heated seat driver side or passenger side do not operate
with LOW position but seat cushion are heated with HIGH posi-
tion.
Front heated seat circuit inspection 2.
Front heated seat driver side or passenger side do not operate
with HIGH position, seat cushion and seat back is heated with
LOW position.
Front heated seat circuit inspection 3.
Front heated seat with HIGH position is not warmer than LOW
position.
Front heated seat switch ground circuit inspec-
tion.
Rear heater seat LH and RH do not operated.
Rear heated seat power supply circuit inspec-
tion 1.
Rear heater seat LH or RH do not operate.
1. Rear heated seat power supply and ground
circuit inspection.
2. Rear power seat switch (Heater switch)
ground circuit inspection.
3.Replace rear power seat control unit.
–
Rear heated seat driver side or passenger side do not operate
with LOW position and, seat cushion is do not heated with
HIGH position.
Rear heated seat circuit inspection 1.
Rear heated seat driver side or passenger side do not operate
with LOW position but seat cushion is heated with HIGH posi-
tion.
Rear heated seat circuit inspection 2.
Rear heated seat driver side or passenger side do not operate
with HIGH position, seat cushion and seat back are heated with
LOW position.
Rear heated seat circuit inspection 3.
Rear heated seat driver side or passenger side switch LOW
position do not operate and, when heated seat switch HIGH
position, seat back and seat cushion is heated.
1. Rear heater seat switch LOW inspection.
2. Rear heats witch seat HIGH inspection.
Rear heated seat with HIGH position is not warmer than LOW
position.
Rear heated seat ground circuit inspection.
HEATED SEAT
SE-141
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Heated Seat Power Supply Circuit Inspection
EIS003VW
1.
CHECK FUSIBLE LINK
Check 20A fuse [No.81, located in fuse block].
NOTE:
Refer to
SE-130, "Component Parts and Harness Connector Location"
OK or NG
OK
>> GO TO 2.
NG
>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse, refer to
130, "Component Parts and Harness Connector Location"
2.
CHECK HEATED SEAT POWER SUPPLY CIRCUIT
1.
Disconnect front heated seat switch connector.
2.
Turn ignition switch ON.
3.
Check voltage between front heated seat driver side switch con-
nector M94 terminal 1 (W/B) and ground.
OK or NG
OK
>> Check the condition of the harness and connector.
NG
>> Repair or replace harness between fuse block and
front heated seat driver side switch.
Front Heated Seat Switch Inspection
EIS003VX
1.
CHECK FRONT HEATED SEAT POWER SUPPLY CIRCUIT
1.
Disconnect front heated seat switch connector.
2.
Turn ignition switch ON.
3.
Check voltage between front heated seat switch connector M94
(driver side), M95 (passenger side) terminal 1 (W/B) and
ground.
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace harness between fuse block and
front heated seat switch.
2.
CHECK FRONT HEATED SEAT SWITCH
1.
Turn ignition switch OFF.
2.
Check continuity between front heated seat switch as follows.
OK or NG
OK
>> Check the condition of the harness and connector.
NG
>> Replace front heated seat switch.
1 (W/B)
−
Ground
: Battery voltage
PIIA4103E
1 (W/B)
−
Ground
: Battery voltage
PIIA4103E
Terminal
Condition
Continuity
1
2
Front heated seat switch LOW.
YES
3
Front heated seat switch HIGH.
YES
2, 3
Other than above.
NO
PIIA4104E
SE-142
HEATED SEAT
Front Heated Seat Circuit Inspection 1
EIS003VY
1.
CHECK FRONT HEATED SEAT SWITCH
1.
Turn ignition switch OFF.
2.
Disconnect front heated seat switch connector.
3.
Check continuity between front heated side power seat switch.
OK or NG
OK
>> GO TO 2.
NG
>> Replace front heated seat switch.
2.
CHECK FRONT SEAT BACK HEATER CIRCUIT
1.
Connect front heated seat switch connector.
2.
Turn ignition switch ON.
3.
Check voltage between front seat back heater connector and
ground.
OK or NG
OK
>> GO TO 6.
NG
>> When turn ignition switch ON and heated switch ON (LOW, HIGH), check the following.
●
When voltage is approx. 0V GO TO 3.
●
When voltage is approx. 12V GO TO 4.
3.
CHECK FRONT SEAT CUSHION HEATER HARNESS
1.
Turn ignition switch OFF.
2.
Disconnect front seat back heater connector and front seat
cushion heater connector.
3.
Check continuity between front seat back heater connector
B152 (Driver side), B352 (Passenger side) terminal C (SB) and
ground.
OK or NG
OK
>> Replace rear seat back.
NG
>> Repair or replace harness between front seat back and
font seat cushion.
Terminal
Condition
Continuity
3 (R/Y)
4 (B)
Front heated seat switch LOW.
YES
Other than above.
NO
PIIA4105E
Connector
Terminal
(Wire color)
Condition
Voltage (V)
(Approx)
(+)
(–)
B152
(Driver side),
B352
(Passenger
side)
C (SB)
Ground
Turn ignition switch ON.
Front heated seat switch
LOW.
6.5
Turn ignition switch ON.
Front heated seat switch
HIGH.
6.5
Front heated seat switch
OFF.
0
PIIA4106E
C (SB)
−
Ground
:Continuity should exist
PIIA4019E
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