Infiniti Q45. Manual - part 845

 

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Infiniti Q45. Manual - part 845

 

 

HEATED SEAT

SE-135

C

D

E

F

G

H

J

K

L

M

A

B

SE

Terminals and Reference Values for Rear Power Seat Control Unit LH and RH

NIS0014D

Work Flow

NIS0014E

1.

Check the symptom and customer's requests.

2.

Understand the outline of system. Refer to 

SE-125, "System Description"

 .

3.

According to the trouble diagnosis chart, repair or replace the cause of the malfunction. Refer to 

SE-136,

"Trouble Diagnoses Symptom Chart"

 .

4.

Does heated seat operate normally? YES: GO TO 5, NO: GO TO 3.

5.

INSPECTION END.

Terminal

Wire 

Color

Item

Signal 

input/output

Condition

Voltage (V)

(Approx.)

2

G

Power source (Fusible link)

Input

Battery voltage

5

BR

Heater Hi signal

Input

Heater Hi operation

Battery voltage

Other than above

0

8

OR

Heater Lo signal

Input

Heater Lo operation

Battery voltage

0

Other than above

0

15

B

Ground

0

20

W/B

Heater indicator Hi signal

Output

Heater Hi operation (lit)

1

Other than above

Battery voltage

22

L/W

Heater switch–Hi signal

Input

Heater switch (Hi) – ON (pressed)

0

Heater switch (Hi) – OFF

5

26

Y/B

Heater indicator Lo signal

Output

Heater Lo operation (lit)

1

Other than above

Battery voltage

32

LG/W

Heater switch–Lo signal

Input

Heater switch (Lo) – ON (pressed)

0

Heater switch (Lo) – OFF

Battery voltage

44

GY/B

IGN power supply

Input

Battery voltage

SE-136

HEATED SEAT

Trouble Diagnoses Symptom Chart

NIS0014F

Check that other systems using the signal of the following systems operate normally.

Symptom

Diagnoses / service procedure

Refer to page

Front heated seat driver side, passenger side and rear heated seat LH, RH 
do not operate.

Check heated seat power supply circuit

SE-137

Front heated seat driver side or passenger side does not operate.

Check front heated seat switch

SE-137

Front heated seat driver side or passenger side do not operate with LOW 
position and, seat cushion is not heated with HIGH position.

Check front heated seat circuit 1

SE-138

Front heated seat driver side or passenger side do not operate with LOW 
position but seat cushion are heated with HIGH position.

Check front heated seat circuit 2

SE-139

Front heated seat driver side or passenger side do not operate with HIGH 
position, seat cushion and seatback is heated with LOW position.

Check front heated seat circuit 3

SE-141

Front heated seat with HIGH position is not warmer than LOW position.

Check front heated seat switch ground 
circuit

SE-142

Rear heater seat LH and RH do not operated.

Check rear power seat control unit 
power supply circuit

SE-143

Rear heater seat LH or RH do not operate.

1. Check rear power seat control unit 
power supply and ground circuit

SE-144

2. Check rear power seat switch (Heater 
switch) ground circuit

SE-145

3. Replace rear power seat control unit

Rear heated seat LH or RH do not operate with LOW position and, seat 
cushion is do not heated with HIGH position.

Check rear heated seat circuit 1

SE-145

Rear heated seat LH or RH do not operate with LOW position but seat 
cushion is heated with HIGH position.

Check rear heated seat circuit 2

SE-147

Rear heated seat LH or RH do not operate with HIGH position, seat 
cushion and seat back are heated with LOW position.

Check rear heated seat circuit 3

SE-148

Rear heated seat LH or RH switch LOW position do not operate and, when 
heated seat switch HIGH position, seat back and seat cushion is heated.

1. Check rear heated seat switch LOW 
circuit

SE-149

2. Check rear heated seat switch HIGH 
circuit

SE-151

Rear heated seat with HIGH position is not warmer than LOW position.

Check rear heated seat ground circuit

SE-152

HEATED SEAT

SE-137

C

D

E

F

G

H

J

K

L

M

A

B

SE

Check Heated Seat Power Supply Circuit

NIS0014G

1. 

CHECK FUSIBLE LINK 

Check 20A fuse (No.81, located in fuse block).
NOTE:
Refer to

SE-124, "Component Parts and Harness Connector Location"

 .

OK or NG

OK

>> Check the condition of the harness.

NG

>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse, refer to 

PG-

2, "POWER SUPPLY ROUTING"

 .

Check Front Heated Seat Switch 

NIS0014H

1. 

CHECK FRONT HEATED SEAT POWER SUPPLY CIRCUIT

1.

Disconnect front heated seat switch connector.

2.

Turn ignition switch ON.

3.

Check voltage between front heated seat switch connector M94
(driver side), M95 (passenger side) terminal 1 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace harness between fuse block and

front heated seat switch.

2. 

CHECK FRONT HEATED SEAT SWITCH

1.

Turn ignition switch OFF.

2.

Check continuity between front heated seat switch as follows.

OK or NG

OK

>> Check the condition of the harness and connector.

NG

>> Replace front heated seat switch.

1 (W/B) 

 Ground

: Battery voltage

PIIA4103E

Terminal

Condition

Continuity

1

2

Front heated seat switch LOW

Yes

3

Front heated seat switch HIGH

Yes

2, 3

Other than above

No

PIIA4104E

SE-138

HEATED SEAT

Check Front Heated Seat Circuit 1

NIS0014I

1. 

CHECK FRONT HEATED SEAT SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect front heated seat switch connector.

3.

Check continuity between front heated side power seat switch.

OK or NG

OK

>> GO TO 2.

NG

>> Replace front heated seat switch.

2. 

CHECK FRONT SEAT BACK HEATER CIRCUIT

1.

Connect front heated seat switch connector.

2.

Turn ignition switch ON.

3.

Check voltage between front seatback heater connector and
ground.

OK or NG

OK

>> GO TO 6.

NG

>> When turn ignition switch ON and heated switch ON (LOW, HIGH), check the following.

When voltage is approx. 0V   GO TO 3.

When voltage is approx. 12V GO TO 4.

3. 

CHECK FRONT SEAT CUSHION HEATER HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect front seatback heater connector and front seat cush-
ion heater connector.

3.

Check continuity between front seatback heater connector B152
(Driver side), B352 (Passenger side) terminal C and ground.

OK or NG

OK

>> Replace rear seat back.

NG

>> Repair or replace harness between front seat back and

font seat cushion.

Terminal

Condition

Continuity

3 4 

Front heated seat switch LOW

Yes

Other than above

No

PIIA4105E

Connector

Terminal

(Wire color)

Condition

Voltage (V) 

(Approx)

(+)

(–)

B152

 (Driver side)

B352

(Passenger 

side)

C (SB)

Ground

Turn ignition switch ON
Front heated seat switch LOW

 6.5

Turn ignition switch ON
Front heated seat switch HIGH

6.5

Front heated seat switch OFF

0

PIIA4106E

C (SB) 

 Ground

:Continuity should exist

PIIA4019E

 

 

 

 

 

 

 

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