Infiniti M35/M45 Y50. Manual - part 1088

HEATED SEAT

SE-149

C

D

E

F

G

H

J

K

L

M

A

B

SE

TIWT1400E

SE-150

HEATED SEAT

TIWT1454E

HEATED SEAT

SE-151

C

D

E

F

G

H

J

K

L

M

A

B

SE

TIWT1402E

SE-152

HEATED SEAT

Terminals and Reference Values for Rear Seat Control Unit

NIS00284

Work Flow

NIS00285

1.

Check the symptom and customer's requests.

2.

Understand the outline of system. Refer to 

SE-144, "System Description"

 .

3.

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

SE-152,

"Trouble Diagnoses Symptom Chart"

 .

4.

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

5.

INSPECTION END.

Trouble Diagnoses Symptom Chart

NIS00286

●

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

Terminal

Wire 

color

Item

Signal

Input/Output

Condition

Voltage (V)

(Approx.)

1

R

Power source (BAT)

Input

—

Battery voltage

4

R/B

Power source (IGN)

Input

—

Battery voltage

5

R/Y

Seat heater HI signal

Input

Seat heater HI operation

Battery voltage

Other than above

0

6

R/L

Seat heater LO signal

Input

Seat heater LO operation

Battery voltage

Other than above

0

8

B/L

Ground (power)

—

—

0

9

W/B

Heated seat indicator HI signal

Output

Heater HI operation (lit)

0

Other than above

Battery voltage

13

B/Y

Ground (signal)

—

—

0

14

W/G

Heated seat indicator LO signal

Output

Heater LO operation (lit)

0

Other than above

Battery voltage

17

W/L

Heated seat switch HI signal

Input

Heated seat switch (HI) – ON (pressed)

0

Heated seat switch (HI) – OFF

Battery voltage

18

W

Heated seat switch LO signal

Input

Heated seat switch (LO) – ON (pressed)

0

Heated seat switch (LO) – OFF

Battery voltage

Symptom

Diagnoses / service procedure

Refer to page

Rear heated seat LH and RH does not operate.

Check rear heated seat power supply and ground 
circuit

SE-153

Rear heated seat LH or RH do not operate.

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

SE-154

2. Check rear heated seat switch circuit 

SE-156

3. Check rear seatback heater circuit 

SE-162

4. Replace rear LH or RH seat control unit

SE-144

Rear heated seat  do not operate with LO or HI position.

1. Check rear heated seat switch circuit

SE-156

2. Check rear heated seat circuit

SE-161

Rear heated seat LH or RH indicator do not operate.

Check rear heated seat indicator power supply 
circuit 

SE-158

Rear heated seat indicator do not operate with LO or HI position

Check rear heated seat indicator circuit 

SE-159