Infiniti F50. Manual - part 798

CLIMATE CONTROLLED SEAT

SE-183

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SE

Seat Back Thermal Electric Device Circuit Inspection

EIS003SL

1. 

CHECK SEATBACK THERMAL ELECTRIC DEVICE HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat control unit connector and seatback thermal electric device connector.

3.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal
J11 (B/R), J12 and seatback thermal electric device connector
B153 (driver side), B353 (passenger side) terminal J11 (B/R),
J12 (PU/W).

4.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal
J11 (B/R), J12 (PU/W) and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace harness between climate controlled seat control unit and seat back thermal

electric device.

2. 

CHECK SEATBACK THERMAL ELECTRIC DEVICE POWER SUPPLY CIRCUIT

1.

Connect climate controlled seat control unit connector and seat-
back thermal electric device connector.

2.

Check voltage between climate controlled seat control unit con-
nector and ground.

OK or NG

OK

>> Seatback thermal electric device circuit check is OK.

NG

>> Replace seat cushion thermal electric device.

J11 (B/R) 

−

 J11 (B/R)

: Continuity should exist

J12 (PU/W) 

−

 J12 (PU/W)

: Continuity should exist

J11 (B/R) 

−

 Ground

: Continuity should not exist

J12 (PU/W) 

−

 Ground

: Continuity should not exist

PIIA3343E

Connector

Terminal

(Wire color)

Condition

Voltage (V)

(Approx)

(+)

(–)

B159

(Driver side),

B359

(Passenger side)

J11(B/R)

Ground

Turn ignition switch ON,
climate controlled seat 
switch turn "HEAT".

 0 – 12

Turn ignition switch OFF.

0

J12

(PU/W)

Turn ignition switch ON,
climate controlled seat 
switch turn "COOL".

 0 – 12

Turn ignition switch OFF.

0

PIIA3344E

SE-184

CLIMATE CONTROLLED SEAT

Seatback Thermal Electric Device Sensor Circuit Inspection

EIS003UQ

1. 

CHECK SEATBACK THERMAL ELECTRIC DEVICE HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat control unit connector and seatback thermal electric device connector.

3.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal
J19 (L/OR), J20 (R/L) and seatback thermal electric device con-
nector B153 (driver side), B353 (passenger side) terminal J19
(L/OR), J20 (R/L).

4.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal
J19 (L/OR), J20 (R/L) and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace harness between climate controlled seat control unit and seat back thermal

electric device.

2. 

CHECK SEAT CUSHION THERMAL ELECTRIC DEVICE SENSOR

●

Connect climate controlled seat control unit connector and seatback thermal electric device connector.

●

Turn ignition switch ON.

●

Check voltage between seat cushion thermal electric device
connector B153 (driver side), B353 (passenger side) terminal
J19 (L/OR) and body ground.

OK or NG

OK

>> Seatback thermal electric device sensor circuit inspec-

tion is OK.

NG

>> Replace seatback thermal electric device.

J19 (L/OR) 

−

 J19 (L/OR)

: Continuity should exist

J20 (R/L) 

−

 J20 (R/L)

: Continuity should exist

J19 (L/OR) 

−

 Ground

: Continuity should not exist

J20 (R/L) 

−

 Ground

: Continuity should not exist

PIIA3341E

J19 (L/OR) 

−

 Ground

: 0.5V 

−

 4V (Approx)

PIIA3340E

CLIMATE CONTROLLED SEAT

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Blower Motor Power Supply Circuit Inspection

EIS003UO

1. 

CHECK BLOWER MOTOR HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat control unit and blower motor connector.

3.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal
J10 (PU) and blower motor connector B155 (driver side), B355
(passenger side) terminal J10 (PU).

4.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal
J10 (PU) and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace harness between climate controlled seat control unit and blower motor.

2. 

CHECK BLOWER MOTOR POWER SUPPLY CIRCUIT

1.

Connect climate controlled seat control unit connector and
blower motor connector.

2.

Check voltage between climate controlled seat control unit con-
nector  and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Replace climate controlled seat control unit.

3. 

CHECK BLOWER MOTOR GROUND HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat control unit connector and blower motor connector.

3.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal J
3 (GY) and blower motor connector B155 (driver side), B355
(passenger side) terminal  J 3 (GY).

4.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal J3
(GY) and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness between climate controlled seat control unit and blower motor.

J10 (PU) 

−

 J10 (PU)

: Continuity should exist

J10 (PU) 

−

 Ground

: Continuity should not exist

PIIA3326E

Connector

Terminal

(Wire color)

Condition

Voltage (V)

(Approx)

(+)

(–)

B159

(Driver side),

B359

(Passenger side)

J10(PU)

Ground

Turn ignition switch ON.
Climate controlled seat 
switch "HEAT" or "COOL".

5.5 – 12

Turn ignition switch OFF.

0

PIIA3325E

J3 (GY) 

−

 J3 (GY)

: Continuity should exist

J3 (GY) 

−

 Ground

: Continuity should not exist

PIIA3327E

SE-186

CLIMATE CONTROLLED SEAT

4. 

CHECK BLOWER MOTOR GROUND HARNESS

1.

Connect climate controlled seat control unit connector.

2.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal J
3 (GY) and climate controlled seat control unit connector B158
(driver side), B358 (passenger side) terminal JC (B).

OK or NG

OK

>> Blower motor circuit check is OK.

NG

>> Replace climate controlled seat control unit.

Blower Motor Speed Control Circuit Inspection

EIS003SM

1. 

CHECK BLOWER MOTOR SPEED CONTROL SIGNAL CIRCUIT

1.

Connect climate controlled seat control unit connector and
blower motor connector.

2.

Check voltage between climate controlled seat control unit con-
nector  and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Replace climate controlled seat control unit.

2. 

CHECK BLOWER MOTOR HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat control unit connector and blower motor connector.

3.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal
J13 (R) and blower motor connector B155 (driver side), B355
(passenger side) terminal J13 (R).

4.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal
J13 (R) and ground.

OK or NG

OK

>> Blower motor control circuit check is OK.

NG

>> Repair or replace harness between climate controlled seat control unit and blower motor.

J3 (GY) 

−

 JC (B)

:Continuity should exist

PIIB0401E

Connector

Terminal

(Wire color)

Condition

Voltage (V)

(Approx)

(+)

(–)

B159

(Driver side),

B359

(Passenger side)

J13(R)

Ground

Turn ignition switch ON.
Climate controlled seat 
switch "HEAT" or "COOL".

4.5 – 9.5

Turn ignition switch OFF.

0

PIIA3323E

J13 (R) 

−

 J13 (R)

: Continuity should exist

J13 (R) 

−

 Ground

: Continuity should not exist

PIIA3324E