Infiniti M45 (Y34). Manual - part 775

CLIMATE CONTROLLED SEAT

SE-121

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SE

Seat Cushion Thermal Electric Device Sensor Circuit Inspection

AIS002CE

1. 

 CHECK SEAT CUSHION THERMAL ELECTRIC DEVICE HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat control unit connector and seat cushion thermal electric device con-
nector.

3.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal
J17 (B/R), J18 (G/R) and seat cushion thermal electric device
dial connector B154 (driver side), B354 (passenger side) termi-
nal J17 (B/R), J18 (G/R).

4.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal
J17 (B/R), J18 (G/R) and ground.

OK or NG

OK

>> GO TO 2.

NG

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

electric device.

2. 

 CHECK SEAT CUSHION THERMAL ELECTRIC DEVICE SENSOR

●

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

●

Turn ignition switch ON.

●

Check voltage between seat cushion thermal electric device
connector B154 (driver side), B354 (passenger side) terminal
J18 (G/R) and ground.

OK or NG

OK

>> Seat cushion thermal electric device sensor circuit

inspection is OK.

NG

>> Replace seat cushion thermal electric device.

J17 (B/R) 

−

 J17 (B/R)

: Continuity should exist.

J18 (G/R) 

−

 J18 (G/R)

: Continuity should exist.

J17 (B/R) 

−

 Ground

: Continuity should not exist.

J18 (G/R) 

−

 Ground

: Continuity should not exist.

PIIA3337E

J18 (G/R) 

−

 Ground

: 0.5V 

−

 4V (Approx.)

PIIA3336E

SE-122

CLIMATE CONTROLLED SEAT

Seatback Thermal Electric Device Circuit Inspection

AIS002CF

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 (PU/W) and seatback thermal electric device con-
nector 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 seatback thermal elec-

tric device.

2. 

 CHECK SEATBACK THERMAL ELECTRIC DEVICE POWER SUPPLY CIRCUIT

1.

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

2.

Turn ignition switch ON.

3.

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”.

 Battery 

voltage

Turn ignition switch OFF.

0

J12

(PU/W)

Ground

Turn ignition switch ON,
climate controlled seat 
switch turn “COOL”.

 Battery 

voltage

Turn ignition switch OFF.

0

PIIA3344E

CLIMATE CONTROLLED SEAT

SE-123

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SE

Seatback Thermal Electric Device Sensor Circuit Inspection

AIS002CG

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 seatback thermal elec-

tric device.

2. 

 CHECK SEAT CUSHION THERMAL ELECTRIC DEVICE SENSOR

1.

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

2.

Turn ignition switch ON.

3.

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

SE-124

CLIMATE CONTROLLED SEAT

Blower Motor Power Supply Circuit Inspection

AIS002CH

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.

Turn ignition switch ON.

3.

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 cli-
mate controlled blower motor connector.

3.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal J3
(GY) and climate controlled blower motor connector B155
(driver side), B355 (passenger side) terminal J3 (GY).

4.

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

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”.

 6 – 12

Turn ignition switch OFF.

0

PIIA3325E

J3 (GY) 

−

 J3 (GY)

: Continuity should exist.

J3 (GY) 

−

 Ground

: Continuity should not exist.

PIIA3327E