ignition INFINITI M35 2007 Factory Service Manual

POWER SEAT(REAR)
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Revision: 2007 April2007 M35/M45
Check Automatic Return Cancel Switch CircuitNIS0027D
1. CHECK AUTOMATIC RETURN CANCEL SWITCH POWER SUPPLY-1
1. Turn ignition switch OFF.
2. Check voltage between rear seat control unit connector and
ground.
OK or NG
OK >> Automatic return cancel switch circuit is OK.
NG >> GO TO 2.
2. CHECK AUTOMATIC RETURN CANCEL SWITCH HARNESS
1. Disconnect rear seat control unit connector and automatic return cancel switch connector.
2. Check continuity between rear seat control unit connector and
automatic return cancel switch connector.
3. Check continuity between rear seat control unit connector and
ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness between rear seat control unit and automatic return cancel switch.
Terminal
ConditionVoltage (V)
(Approx.) (+)
(–) Rear seat
control unit
connectorTe r m i n a l
B304 (LH)
B354 (RH)11 GroundAutomatic return
cancel switch ON
and, rear door open5
Other than above. 0
PIIB5925E
AB
Continuity
Rear seat control
unit connectorTerminalAutomatic return
cancel switch
connectorTerminal
B304 (LH)
B354 (RH)11 B508 1 Yes
A
GroundContinuity
Rear seat control unit connector Terminal
B304 (LH)
B354 (RH)11 N o
PIIB5926E

SE-110
POWER SEAT(REAR)
Revision: 2007 April2007 M35/M45
3. CHECK AUTOMATIC RETURN CANCEL SWITCH POWER SUPPLY-2
1. Connect rear seat control unit connector.
2. Check voltage between rear seat control unit connector and
ground.
OK or NG
OK >> Check the condition of the harness and connector.
NG >> Replace rear seat control unit.
Check Automatic Return Cancel SwitchNIS0027E
1. CHECK AUTOMATIC RETURN CANCEL SWITCH
1. Turn ignition switch OFF.
2. Disconnect automatic return cancel switch connector.
3. Check continuity between automatic return cancel switch as fol-
lows.
OK or NG
OK >> GO TO 2.
NG >> Replace automatic return cancel switch.
2. CHECK AUTOMATIC RETURN CANCEL SWITCH GROUND HARNESS
Check continuity between automatic return cancel switch connector
and ground.
OK or NG
OK >> Check the harness and connector.
NG >> Repair or replace harness between automatic return
cancel switch and ground.
Terminals
Voltage (V)
(Approx.) (+)
(–)
Rear seat control
unit connectorTerminal
B304 (LH)
B354 (RH)11 Ground 5
PIIB5925E
Automatic return
cancel switch
connectorTerminal Condition Continuity
B508 1 3Automatic return
cancel switchCANCEL Yes
ON No
PIIB5927E
Te r m i n a l
Continuity
Automatic return cancel
switch connectorTerminal
Ground
B508 3 Yes
PIIB5928E

POWER SEAT(REAR)
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Revision: 2007 April2007 M35/M45
Check Rear Door Switch CircuitNIS0027F
1. CHECK REAR DOOR SWITCH POWER SUPPLY-1
1. Turn ignition switch OFF.
2. Check voltage between rear seat control unit connector and
ground.
OK or NG
OK >> Rear door switch circuit is OK.
NG >> GO TO 2.
2. CHECK REAR DOOR SWITCH HARNESS
1. Disconnect rear seat control unit connector and rear door switch connector.
2. Check continuity between rear seat control unit connector and
rear door switch connector.
3. Check continuity between rear seat control unit connector and
ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness between rear seat control unit and rear door switch.
3. CHECK REAR DOOR SWITCH
Check continuity between rear door switch and ground.
OK or NG
OK >> GO TO 4.
NG >> Replace rear door switch.
Terminal
ConditionVoltage (V)
(Approx.) (+)
(–) Rear seat
control unit
connectorTe r m i n a l
B304 (LH)
B354 (RH)16 GroundRear door open. 0
Rear door closed. Battery voltage
PIIB5929E
AB
Continuity
Rear seat control
unit connectorTerminalRear door switch
connectorTerminal
B304 (LH)
B354 (RH)16B53 (LH)
B403 (RH)2 Yes
A
GroundContinuity
Rear seat control unit connector Terminal
B304 (LH)
B354 (RH)16 No
PIIB5930E
Rear door switch
connectorTerminal Condition Continuity
B53 (LH)
B403 (RH)2 GroundRear door open. Yes
Rear door closed. No
PIIB5931E

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POWER SEAT(REAR)
Revision: 2007 April2007 M35/M45
4. CHECK REAR DOOR SWITCH POWER SUPPLY-2
1. Connect rear seat control unit connector.
2. Check voltage between rear seat control unit connector and
ground.
OK or NG
OK >> Check the condition of the harness and connector.
NG >> Replace rear seat control unit.
Check Rear Seat Sliding Sensor CircuitNIS0027G
1. CHECK REAR SEAT SLIDING SENSOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Check signal between rear seat control unit connector and
ground with oscilloscope.
OK or NG
OK >> Check the condition of the harness and connector.
NG >> GO TO 2.
Terminals
Voltage (V)
(Approx.) (+)
(–)
Rear seat control
unit connectorTerminal
B304 (LH)
B354 (RH)16 Ground Battery voltage
PIIB5929E
Terminal
ConditionSignal
(Reference valve) (+)
(–) Rear seat
control unit
connectorTerminal
B304 (LH)
B354 (RH)12 GroundSliding
device
active
PIIB5932E
SIIA0690J

SE-114
CLIMATE CONTROLLED SEAT
Revision: 2007 April2007 M35/M45
CLIMATE CONTROLLED SEATPFP:870U6
Component Parts and Harness Connector LocationNIS0027H
System DescriptionNIS0027I
The climate controlled seat system is controlled by climate controlled seat control unit.
Heating and cooling are possible for a thermal electric device (heat conversion machine).
NOTE:

The climate controlled seat system is downed when the temperature sensor set as the seat cushion and
the seat back's thermal electric device machine detects 20 °C (68 °F)or more of mutual differences of tem-
perature.

In this case, by turning off ignition switch, system down is canceled and it can be reused by turning on
ignition switch again.

The climate controlled seat blower keep low speed for approximately 60 seconds after turning the climate
controlled seat switch.
CAUTION:

The thermal electric device has the character in which, as for an opposite side. one side becomes
high temperature at the time of low temperature.
PIIB5891E
1. Fuse block (J/B) 2. Climate controlled seat relay E16 3.a: Climate controlled seat switch
driver side B430
b: Climate controlled seat switch
passenger side B429
4.a: Seat cushion thermal electric
device B285 (driver side)
B295 (passenger side)
b: Climate controlled seat control
unit B283, B284 (driver side)
B293, B294 (passenger side)
c: Climate controlled seat blower
motor B282 (driver side)
B292 (passenger side)5.Seatback thermal electric device
B220 (driver side)
B258 (passenger side)

CLIMATE CONTROLLED SEAT
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At the time of work, please turn OFF a switch, and carry it out after checking that the thermal elec-
tric device has got cold.
Power is at all times supplied

through 15A fuse [No. 41 located in the fuse fusible link and relay unit]

to climate controlled seat relay terminals 5.

through 15A fuse [No. 42 located in the fuse fusible link and relay unit]

to climate controlled seat relay terminals 7.
When the ignition switch turned to ON or START position,
Power is supplied

through 10A fuse [No. 12, located in the fuse block (J/B)]

to climate controlled seat relay terminal 2.
Then ground is supplied

to climate controlled seat relay terminal 1,

through body grounds E22 and E43.
Then climate controlled seat relay is energized.
When climate controlled seat relay is turned to ON,
Power is supplied,

through climate controlled seat relay terminal 3,

to climate controlled seat control unit (passenger side) terminal 2 and 4.

through climate controlled seat relay terminal 6,

to climate controlled seat control unit (driver side) terminal 2 and 4.
When climate controlled switch select HEAT, ground is supplied

through climate controlled seat switch terminal 1 and 3,

to climate controlled seat control unit terminal 10.
Then, the climate controlled seat control unit receives climate controlled seat switch HEAT signal.
When climate controlled seat switch select COOL, ground is supplied

through climate controlled seat switch terminal 1 and 2,

to climate controlled seat control unit terminal 20,
Then, the climate controlled seat control unit receives climate controlled switch COOL signal.
When blower motor rotates, signal is transmitted

to climate controlled seat control unit terminal 18,

through climate controlled seat blower motor terminal 1.
This is climate controlled seat blower motor tachometer signal.
When climate controlled seat control unit receives climate controlled seat switch signal and tachometer signal,
Power is supplied

to climate controlled seat blower motor terminal 4,

through climate controlled seat control unit terminal 17.
This is blower motor revolution control signal.
When blower motor receivers blower motor revolution control signal,
Power is supplied

through climate controlled seat control unit terminal 14,

to climate controlled seat blower motor terminal 2.
When number of rotations correspond signal,
Ground is supplied

to climate controlled seat blower motor terminal 3,

through climate controlled seat control unit terminal 7,

through climate controlled seat control unit terminal 3,

through body grounds B5, B40 and B131.
Then motor revolution is controlled.
When the ignition switch turned to ON or START position,
Power is supplied

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CLIMATE CONTROLLED SEAT
Revision: 2007 April2007 M35/M45

to seat cushion thermal electric device terminal 1,

through climate controlled seat control unit terminal 22.
Then ground is supplied

to climate controlled seat control unit terminal 21,

through seat cushion thermal electric device terminal 2,
Then the climate controlled seat control unit recognizes seat cushion thermal electric device sensor signal.
When climate controlled seat control unit recognizes climate controlled seat switch HEAT signal and, seat
cushion thermal electric device sensor signal,
Power is supplied

to seat cushion thermal electric device terminal 4,

through climate controlled seat control unit terminal 5.
Then ground is supplied

through seat cushion thermal electric device terminal 6,

to climate controlled seat control unit terminal 6,

through climate controlled seat control unit terminal 3,

through body grounds B5, B40 and B131.
When climate controlled seat control unit recognizes climate controlled seat switch COOL signal and seat
cushion thermal electric device sensor signal,
Power is supplied

to seat cushion thermal electric device terminal 6,

through climate controlled seat control unit terminal 6.
Then ground is supplied

through seat cushion thermal electric device terminal 4,

to climate controlled seat control unit terminal 5.

through climate controlled seat control unit terminal 3,

through body grounds B5, B40 and B131.
When the ignition switch turned to ON or START position,
Power is supplied

to seatback thermal electric device terminal 1,

through climate controlled seat control unit terminal 23.
Then ground is supplied

to climate controlled seat control unit terminal 24,

through seatback thermal electric device terminal 2,

through climate controlled seat control unit terminal 3,

through body grounds B5, B40 and B131.
Then the climate controlled seat control unit recognizes seatback thermal electric device sensor signal.
When climate controlled seat control unit recognizes climate controlled seat switch HEAT signal and seatback
thermal electric device sensor signal,
Power is supplied

to seatback thermal electric device terminal 4,

through climate controlled seat control unit terminal 15,
ground is supplied

to climate controlled seat control unit terminal 16,

through seatback thermal electric device terminal 6,

through climate controlled seat control unit terminal 3,

through body grounds B5, B40 and B131.
This seatback thermal electric device generates heat wind is warmed.
When climate controlled seat control unit recognizes climate controlled seat switch COOL signal and seatback
thermal electric device sensor signal,
Power is supplied

to seatback thermal electric device terminal 6,

SE-124
CLIMATE CONTROLLED SEAT
Revision: 2007 April2007 M35/M45
Terminal and Reference Value for Climate Controlled Seat Control UnitNIS0027L
Te r -
minalWire
ColorItemSignal
Input/
OutputConditionVoltage (V)
(Approx)
2 R/Y Ignition switch power supply Input Ignition switch ON or START Battery voltage
3 B Ground — — 0
4 R/Y Ignition switch power supply Input Ignition switch ON or START Battery voltage
5G/RSeat cushion thermal electric
device power supply (HEAT)InputIgnition switch
ON or STARTClimate controlled
seat switch selectHEAT or
COOL0 – Battery
voltage
OFF 0
6G/BSeat cushion thermal electric
device power supply (COOL)InputIgnition switch
ON or STARTClimate controlled
seat switch select COOL or
HEAT 0 – Battery
voltage
OFF 0
7 B/R Blower motor ground — — 0
8 LG/R HEAT switch indicator signal OutputIgnition switch
ON or STARTClimate controlled
seat switch select HEAT Battery voltage
OFF 0
9 LG/B COOL switch indicator signal OutputIgnition switch
ON or STARTClimate controlled
seat switch select COOL Battery voltage
OFF 0
10 Y/R HEAT switch signal InputIgnition switch
ON or STARTClimate controlled
seat switch select HI HEAT 2.6 – 3.5
MID HEAT 1.6 – 2.5
LO HEAT 0.5 – 1.5
OFF 0
11 B / RClimate controlled seat switch
power supplyInput Ignition switch ON or START Battery voltage
14 V/W Blower motor power supply Input Ignition switch ON or START Battery voltage
15 W/RSeatback thermal electric device
power supply (HEAT) InputIgnition switch
ON or STARTClimate controlled
seat switch select HEAT or
COOL0 – Battery
voltage
OFF 0
16 W/BSeatback thermal electric device
power supply (COOL) InputIgnition switch
ON or STARTClimate controlled
seat switch select COOL or
HEAT 0 – Battery
voltage
OFF 0
17 R/B Blower motor speed control signal InputIgnition switch
ON or STARTClimate controlled
seat switch select HEAT or
COOL4.5 – 8.0
OFF 0
18 V Blower motor tachometer signal OutputIgnition switch
ON or STARTClimate controlled
seat switch select HEAT or
COOL4.5 – 8.0
OFF Battery voltage
20 Y/G COOL switch signal InputIgnition switch
ON or STARTClimate controlled
seat switch select HI COOL 2.6 – 3.5
MID COOL 1.6 – 2.5
LO COOL 0.5 – 1.5
OFF 0
21 GR/LSeat cushion thermal electric
device sensor ground— Ignition switch ON 0
22 GR/RSeat cushion thermal electric
device sensor signalInputBlower motor operated 0.5 – 4
Ignition switch OFF 0

CLIMATE CONTROLLED SEAT
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Work FlowNIS0027M
1. Check the symptom and customer's requests.
2. Understand the outline of system. Refer to SE-114, "
System Description" .
3. Perform the preliminary check. Refer toSE-126, "
Preliminary Check" .
4. According to the trouble diagnosis chart, repair or replace the cause of the malfunction. Refer to SE-126,
"Trouble Diagnoses Symptom Chart" .
5. Does climate controlled seat operate normally? YES: GO TO 6, NO: GO TO 4.
6. INSPECTION END.
23 L/RSeatback thermal electric device
sensor signalInputBlower motor operated 0.5 – 4
Ignition switch OFF 0
24 LSeatback thermal electric device
sensor ground— Ignition switch ON 0 Te r -
minalWire
ColorItemSignal
Input/
OutputConditionVoltage (V)
(Approx)

SE-126
CLIMATE CONTROLLED SEAT
Revision: 2007 April2007 M35/M45
Trouble Diagnoses Symptom ChartNIS0027O
NOTE:
Make sure other systems using the signal of the following systems operate normally.
NOTE:

The climate controlled seat blower keep low speed for approximately 60 seconds turning the switch.

The climate controlled seat system is downed when the temperature sensor set as the seat cushion and
the seatback's thermal electric device machine detects 20 °C (68°F) or more of mutual differences of tem-
perature.
Preliminary CheckNIS0027N
1. CHECK DUCT AND FILTER
Check the following.

Is that there no foreign body in the blower motor filter.

Is that there no foreign body in the duct.
OK or NG
OK >> Preliminary check is OK.
NG >> The foreign body is removed.
Symptom Diagnoses / service procedureRefer to
page
Climate controlled seat do not operate
(Neither the driver's side nor passenger's side operate).1. Check climate controlled seat control unit power supply
circuit SE-127
All the driver side or passenger side climate controlled seat
do not operate.1. Check climate controlled seat control unit power supply
and ground circuit SE-1282. Check climate controlled seat switch power supply circuit SE-131
3. Check climate controlled seat blower motor circuit SE-141
4. Replace climate controlled seat control unitSE-114
Climate controlled seat blower motor speed cannot adjust.1. Check climate controlled seat switch power supply circuit SE-1312. Check climate controlled seat switch circuit SE-132
3. Check climate controlled seat control unit SE-143
4. Replace climate controlled seat blower motorSE-114
The climate controlled seat dose not operates when the
switch is done in HEAT or COOL.Check climate controlled seat switch circuit SE-132
When the climate controlled seat switch is turned on,
operation stops at nose (When the climate controlled seat
switch is in HEAT or COOL mode after ignition switch is
turned ON again, the motor operates).1. Check seat cushion thermal electric device sensor circuit SE-1382. Check seat cushion thermal electric device circuit SE-136
3. Check seatback thermal electric device sensor circuitSE-140
4. Check seatback thermal electric device circuit SE-137
5. Check climate controlled seat blower motor circuitSE-141
6. Replace Climate controlled seat control unitSE-114
The climate controlled seat switch indicator do not operated
with HEAT or COOL positionCheck climate controlled seat switch indicator circuit SE-134