Infiniti Q45. Manual - part 856

CLIMATE CONTROLLED SEAT

SE-179

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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 and blower motor connector B155 (driver side), B355 (passen-
ger side) terminal  J3.

4.

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

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness.

4. 

CHECK BLOWER MOTOR GROUND HARNESS

Check continuity between climate controlled seat control unit con-
nector B159 (driver side), B359 (passenger side) terminal J3 and cli-
mate controlled seat control unit connector B158 (driver side), B358
(passenger side) terminal JC.

OK or NG

OK

>> Blower motor circuit check is OK.

NG

>> Replace climate controlled seat control unit.

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 – Battery 

voltage

Turn ignition switch OFF

0

PIIB2128E

J3 (GY) 

−

 J3 (GY)

: Continuity should exist

J3 (GY) 

−

 Ground

: Continuity should not exist

PIIA3327E

J3 (GY) 

−

 JC (B)

:Continuity should exist

PIIB0401E

SE-180

CLIMATE CONTROLLED SEAT

Check Blower Motor Speed Control Circuit 

NIS0015G

1. 

CHECK BLOWER MOTOR SPEED CONTROL SIGNAL CIRCUIT

Check voltage between climate controlled seat control unit connec-
tor  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 and blower motor connector B155 (driver side), B355 (pas-
senger side) terminal J13.

4.

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

OK or NG

OK

>> Blower motor control circuit check is OK.

NG

>> Repair or replace harness.

Check Blower Motor Tachometer Signal Circuit 

NIS0015H

1. 

CHECK BLOWER MOTOR TACHOMETER SIGNAL 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 2.

NG

>> Replace climate controlled seat blower motor.

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

PIIB2129E

J13 (R) 

−

 J13 (R)

: Continuity should exist

J13 (R) 

−

 Ground

: Continuity should not exist

PIIA3324E

Connector

Terminal

(Wire color)

Condition

Voltage (V)

(Approx)

(+)

(–)

B159

(Driver side)

B359

(Passenger side)

J14 (W)

Ground

Climate controlled seat 
switch “HEAT” or “COOL”
temperature dial 1 – 4

 5 – 7

Climate controlled seat 
switch OFF

0

PIIA3321E

CLIMATE CONTROLLED SEAT

SE-181

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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
J14 and blower motor connector B155 (driver side), B355 (pas-
senger side) terminal J14.

4.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal
J14 and ground.

OK or NG

OK

>> Blower motor tachometer signal circuit check is OK.

NG

>> Repair or replace harness.

Check Climate Controlled Seat Control Unit

NIS0015I

1. 

CHECK THE CLIMATE CONTROLLED SEAT CONTROL UNIT

Does the heater operate normally when the driver side or passenger side climate controlled seat control unit is
exchanged?

YES or NO

YES

>> Climate controlled seat control unit check is OK.

NO

>> Replace climate controlled seat control unit.

J14 (W) 

−

 J14 (W)

: Continuity should exist

J14 (W) 

−

 Ground

: Continuity should not exist

PIIA3322E

SE-182

FRONT SEAT

FRONT SEAT

PFP:87000

Removal and Installation

NIS0015J

DRIVER SIDE POWER SEAT

PIIA0162E