Infiniti M45 (Y34). Manual - part 774

CLIMATE CONTROLLED SEAT

SE-117

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Climate Controlled Seat Temperature Dial Inspection

AIS002CA

1. 

 CHECK CLIMATE CONTROLLED SEAT TEMPERATURE DIAL

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat temperature dial connector.

3.

Check continuity between climate controlled seat temperature
dial.

OK or NG

OK

>> Climate controlled seat temperature dial check is OK.

NG

>> Replace climate controlled seat temperature dial. 

Climate Controlled Seat Temperature Dial Circuit Inspection

AIS002CB

1. 

CHECK CLIMATE CONTROLLED SEAT TEMPERATURE DIAL HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat control unit connector and climate controlled seat temperature dial
connector.

3.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal J7
(L), J15 (Y) and climate controlled seat temperature dial connec-
tor B157 (driver side), B357 (passenger side) terminal J7 (L),
J15 (Y).

4.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal J7
(L), J15 (Y) and ground.

OK or NG

OK

>> GO TO 2.

NG

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

temperature dial.

Terminal

Condition

Continuity

Ω

(Approx.)

J7

J15

Temperature dial 1st.

2370

Temperature dial 2nd.

 1100

Temperature dial 3rd.

 619

Temperature dial 4th.

 237

PIIA3334E

J7 (L) 

−

 J7 (L)

: Continuity should exist.

J15 (Y) 

−

 J15 (Y)

: Continuity should exist.

J7 (L) 

−

 Ground

: Continuity should not exist.

J15 (Y) 

−

 Ground

: Continuity should not exist.

PIIA3333E

SE-118

CLIMATE CONTROLLED SEAT

2. 

 CHECK CLIMATE CONTROLLED SEAT TEMPERATURE DIAL POWER SUPPLY CIRCUIT

1.

Connect climate controlled seat control unit connector and climate controlled seat temperature dial con-
nector.

2.

Turn ignition switch ON.

3.

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

OK or NG

OK

>> Climate controlled seat temperature dial circuit check is OK.

NG

>> When turn ignition ON and temperature dial adjust the following

●

When voltage is 12V, GO TO3.

●

When voltage is 0V, Replace climate controlled seat control unit.

3. 

 CHECK CLIMATE CONTROLLED SEAT TEMPERATURE DIAL

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat temperature dial connector.

3.

Check continuity between climate controlled seat temperature
dial.

OK or NG

OK

>> Replace climate controlled seat control unit.

NG

>> Replace climate controlled seat temperature dial. 

Connector

Terminal

(Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(–)

B159

(Driver side),

B359

(Passenger side)

J7(L)

Ground

Turn 
ignition 
switch 
ON.

temperature dial 
1 – 4

7.1 – 11.4

Turn ignition switch OFF.

0

PIIA3383E

Terminal

Condition

Continuity

Ω

(Approx.)

J7

J15

Temperature dial 1st.

2370

Temperature dial 2nd.

 1100

Temperature dial 3rd.

 619

Temperature dial 4th.

 237

PIIA3334E

CLIMATE CONTROLLED SEAT

SE-119

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Climate Controlled Seat Switch Ground Circuit Inspection

AIS002CC

1. 

 CHECK CLIMATE CONTROLLED SEAT SWITCH 

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat switch connector.

3.

Check continuity between climate controlled seat switch.

OK or NG

OK

>> GO TO 2.

NG

>> Replace climate controlled seat switch. 

2. 

 CHECK CLIMATE CONTROLLED SEAT SWITCH GROUND CIRCUIT

Check continuity between climate controlled seat switch connector
B156 (driver side), B356 (passenger side) terminal JCA (B).

OK or NG

OK

>> Climate controlled seat control circuit check is OK.

NG

>> Repair or replace harness between climate controlled

seat switch and body ground.

Terminal

Condition

Continuity

J6

JCA

Climate controlled seat switch 
HEAT position.

Yes

Climate controlled seat switch 
OFF.

No

J16

Climate controlled seat switch 
COOL position.

Yes

Climate controlled seat switch 
OFF.

No

PIIA3350E

JCA (B) 

−

 Ground

: Continuity should exist.

PIIA3332E

SE-120

CLIMATE CONTROLLED SEAT

Seat Cushion Thermal Electric Device Circuit Inspection

AIS002CD

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 J1
(Y/G), J2 (W/L) and climate controlled seat temperature dial
connector B154 (driver side), B354 (passenger side) terminal J1
(Y/G), J2 (W/L).

4.

Check continuity between climate controlled seat control unit
connector B159 (driver side), B359 (passenger side) terminal J1
(Y/G), J2 (W/L) 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 POWER SUPPLY CIRCUIT POWER SUPPLY 

CIRCUIT

1.

Connect climate controlled seat control unit connector.

2.

Turn ignition switch ON.

3.

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

OK or NG

OK

>> Seat cushion Thelma electric device circuit check is OK.

NG

>> Replace seat cushion thermal electric device.

J1 (Y/G) 

−

 J1 (Y/G)

: Continuity should exist.

J2 (W/L) 

−

 J2 (W/L)

: Continuity should exist.

J1 (Y/G) 

−

 Ground

: Continuity should not exist.

J2 (W/L) 

−

 Ground

: Continuity should not exist.

PIIA3339E

Connector

Terminal

(Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(–)

B159

(Driver side),

B359

(Passenger side)

J1(Y/G)

Ground

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

 Battery 

voltage

Turn ignition switch OFF.

0

J2(WL)

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

 Battery 

voltage

Turn ignition switch OFF.

0

PIIA3338E