Infiniti M45 (Y34). Manual - part 773

CLIMATE CONTROLLED SEAT

SE-113

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B

SE

Passenger Side Climate Controlled Seat Control Unit Power Supply Circuit 
Inspection

AIS002C7

1. 

CHECK FUSE 

Check if any of the following fuses for Fuse, fusible link and relay unit block (J/B) are blown.

NOTE:
Refer to 

SE-100, "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 

SE-

100, "Component Parts and Harness Connector Location"

 .

2. 

 CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT POWER SUPPLY CIRCUIT1

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat relay.

3.

Check voltage between climate controlled seat relay connector
E76 terminal 7 (L) and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness between fuse block (J/B) and

climate controlled seat relay.

3. 

 CHECK CLIMATE CONTROLLED SEAT RELAY

Check continuity between climate controlled seat relay terminals 6
and 7.

OK or NG

OK

>> GO TO 4.

NG

>> Replace climate controlled seat relay.

COMPONENT PARTS

AMPERE

FUSE NO.

Fuse, fusible link and relay unit

15A

71

7 (L) 

−

 Ground

: Battery voltage

PIIA3317E

Terminal

Condition

Continuity

6

7

12V direct current supply 
between terminals 1 and 2

Yes

No current supply

No

SEC202B

SE-114

CLIMATE CONTROLLED SEAT

4. 

 CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT POWER SUPPLY CIRCUIT 2

1.

Connect climate controlled seat relay.

2.

Disconnect climate controlled seat control unit connector.

3.

Turn ignition switch ON.

4.

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

OK or NG

OK

>> GO TO 5.

NG

>> Repair or replace harness between climate controlled seat relay and climate controlled seat con-

trol unit.

5. 

 CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT POWER SUPPLY CIRCUIT 3

Check voltage between climate controlled seat control unit connec-
tor and ground.

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace harness between fuse block and cli-

mate controlled seat control unit.

6. 

 CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check continuity between climate controlled seat control unit
connector B358 terminal JC (B) and ground.

OK or NG

OK

>> Passenger side climate controlled seat unit power sup-

ply and ground circuit check is OK.

NG

>> Repair or replace harness between climate controlled

seat control unit and ground.

Con-

nector

Terminal

(Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(–)

B358

JD(W/G)

Ground

Turn ignition switch ON.

 Battery voltage

Turn ignition switch OFF.

0

PIIA3385E

Con-

nector

Terminal

(Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(–)

B358

JB(W/R)

Ground

Turn ignition switch ON.

 Battery voltage

Turn ignition switch OFF.

0

PIIA3384E

JC (B) 

−

 Ground

: Continuity should exist.

PIIA3335E

CLIMATE CONTROLLED SEAT

SE-115

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Climate Controlled Seat “HEAT” Switch Circuit Inspection

AIS002C8

1. 

 CHECK CLIMATE CONTROLLED SEAT HEAT SWITCH HARNESS CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat control unit and climate con-
trolled seat switch connector.

3.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal J6
(PU) and climate controlled seat switch connector B156 (driver
side), B356 (passenger side) terminal J6 (PU).

4.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal J6
(PU) and ground.

OK or NG

OK

>> GO TO 2.

NG

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

switch.

2. 

 CHECK CLIMATE CONTROLLED SEAT HEAT SWITCH POWER SUPPLY CIRCUIT

1.

Connect climate controlled seat control unit connector and climate controlled seat switch.

2.

Turn ignition switch ON.

3.

Turn climate controlled seat switch “HEAT”.

4.

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

OK or NG

OK

>> Replace climate controlled seat control unit. 

NG

>> GO TO 3.

3. 

 CHECK CLIMATE CONTROLLED SEAT TEMPERATURE DIAL

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat switch connector.

3.

Check continuity between climate controlled seat switch.

OK or NG

OK

>> Check the condition of the harness and the connector.

NG

>> Replace climate controlled seat switch. 

J6 (PU) 

−

 J6 (PU)

: Continuity should exist.

J6 (PU) 

−

 Ground

: Continuity should not exist.

PIIA3331E

Connector

Terminal

(Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(–)

B156

 (Driver side), 

B356 

(Passenger side)

J6 (PU)

Ground

Turn ignition switch ON.
Turn climate controlled 
seat switch “HEAT”.

0

Climate controlled seat 
switch OFF.

 Battery voltage

PIIA3330E

Terminal

Condition

Continuity

J6

JCA

Climate controlled seat switch 
HEAT position.

Yes

Climate controlled seat switch 
OFF.

No

PIIA4127E

SE-116

CLIMATE CONTROLLED SEAT

Climate Controlled Seat “COOL” Switch Circuit Inspection

AIS002C9

1. 

 CHECK CLIMATE CONTROLLED SEAT COOL SWITCH HARNESS CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat control unit and climate con-
trolled seat switch connector.

3.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal
J16 (R) and climate controlled seat switch connector B156
(driver side), B356 (passenger side) terminal J16 (R).

4.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal
J16 (R) and ground.

OK or NG

OK

>> GO TO 2.

NG

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

switch.

2. 

 CHECK CLIMATE CONTROLLED SEAT COOL SWITCH POWER SUPPLY CIRCUIT

1.

Connect climate controlled seat control unit connector and climate controlled seat switch.

2.

Turn ignition switch ON.

3.

Turn climate controlled seat switch COOL.

4.

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

OK or NG

OK

>> Replace climate controlled seat control unit. 

NG

>> GO TO 3.

3. 

 CHECK CLIMATE CONTROLLED SEAT TEMPERATURE DIAL 

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat switch connector.

3.

Check continuity between climate controlled seat switch.

OK or NG

OK

>> Check the condition of the harness and the connector.

NG

>> Replace climate controlled seat switch. 

J16 (R) 

−

 J16 (R)

: Continuity should exist.

J16 (R) 

−

 Ground

: Continuity should not exist.

PIIA3329E

Connector

Terminal

(Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(–)

B156

 (Driver side), 

B356 

(Passenger side)

J16 (R)

Ground

Turn ignition switch ON.
Turn climate controlled 
seat switch COOL.

0

Climate controlled seat 
switch OFF.

 Battery voltage

PIIA3328E

Terminal

Condition

Continuity

J16

JCA

Climate controlled seat switch 
COOL position.

Yes

Climate controlled seat switch 
OFF.

No

PIIA4128E