control unit INFINITI M35 2007 Factory Service Manual

CLIMATE CONTROLLED SEAT
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Revision: 2007 April2007 M35/M45

through climate controlled seat control unit terminal 16,
ground is supplied

to climate controlled seat control unit terminal 15,

through seatback thermal electric device terminal 4,

through climate controlled seat control unit terminal 3,

through body grounds B5, B40 and B131.
When climate controlled switch selects HEAT,
Power is supplied

to climate controlled seat switch terminal 5,

through climate controlled seat control unit terminal 8.
Ground is supplied

to the climate controlled seat switch terminal 6,

through body grounds B402 and B405.
Then climate controlled seat switch HEAT indicator is energized.
When climate controlled switch select COOL,
Power is supplied

to climate controlled seat switch terminal 4,

through climate controlled seat control unit terminal 9.
Ground is supplied

to the climate controlled seat switch terminal 6,

through body grounds B402 and B405.
Then climate controlled seat switch COOL indicator is energized.

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

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

CLIMATE CONTROLLED SEAT
SE-127
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Revision: 2007 April2007 M35/M45
Check Climate Controlled Seat Control Unit Power Supply Circuit NIS0027P
1. CHECK FUSE
Check 10A fuse [No. 12, located in fuse block (J/B)]
NOTE:
Refer to SE-114, "
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 PG-
3, "POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK CLIMATE CONTROLLED SEAT RELAY POWER SUPPLY CIRCUIT
1. Disconnect climate controlled seat relay connector.
2. Turn ignition switch ON.
3. Check voltage between climate controlled seat relay harness
connector 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 climate controlled seat relay.
OK or NG
OK >> GO TO 4.
NG >> Replace climate controlled seat relay.
Terminal
Voltage (V)
(Approx.) (+)
(–)
Climate controlled
seat relay connectorTerminal
E16 2 Ground Battery voltage
PIIB6067E
Climate controlled
seat relay connectorTerminal Condition Continuity
E163512V direct current
supply between
terminals 1and 2Ye s
No current supply No
6712V direct current
supply between
terminals 1and 2Ye s
No current supply No
SEC202B

SE-128
CLIMATE CONTROLLED SEAT
Revision: 2007 April2007 M35/M45
4. CHECK CLIMATE CONTROLLED SEAT RELAY GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between climate controlled seat relay connec-
tor and ground.
OK or NG
OK >> Check the condition of the harness and connector.
NG >> Repair or replace harness between climate controlled
seat relay and ground.
Check Climate Controlled Seat Control Unit Power Supply and Ground Circuit NIS0027Q
1. CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT POWER SUPPLY CIRCUIT
1. Disconnect 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 >> GO TO 6.
NG >> GO TO 2.
2. CHECK FUSE

Check 15A fuse [No. 42, located in fuse, fusible link and relay unit] (Driver side)

Check 15A fuse [No. 41, located in fuse, fusible link and relay unit] (Passenger side)
NOTE:
Refer to SE-114, "
Component Parts and Harness Connector Location" .
OK or NG
OK >> GO TO 3.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse, refer to PG-
3, "POWER SUPPLY ROUTING CIRCUIT" .
Te r m i n a l
Continuity
Climate controlled
seat relay connectorTerminal
Ground
E16 1 Yes
PIIB6068E
Te r m i n a l
Voltage (V)
(Approx.) (+)
(–)
Climate controlled seat
control unit connectorTerminal
B284
(driver side)
B294
(passenger side)2
Ground Battery voltage
4
PIIB6069E

SE-130
CLIMATE CONTROLLED SEAT
Revision: 2007 April2007 M35/M45
5. CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT HARNESS CIRCUIT
1. Check continuity between climate controlled seat control unit
connector and climate controlled seat relay connector.
2. Check continuity between climate controlled seat control unit connector and ground.
OK or NG
OK >> Check the condition of the harness and connector.
NG >> Repair or replace harness between climate controlled seat control unit and climate controlled seat
relay.
6. CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT GROUND CIRCUIT
Check continuity between climate controlled seat control unit con-
nector and ground.
OK or NG
OK >> Climate controlled seat control unit power supply and ground circuit is OK.
NG >> Repair or replace harness between climate controlled seat control unit and ground.
AB
Continuity Climate controlled
seat control unit
connectorTerminalClimate controlled
seat relay
connectorTerminal
B284
(driver side)2
E166
Ye s 4
B294
(passenger side)2
3
4
A
GroundContinuity Climate controlled
seat control unit
connectorTerminal
B284 (driver side)
B294 (passenger side)2
No
4
PIIB6071E
Terminal Continuity
Climate controlled
seat control unit
connectorTe r m i n a l
Ground Yes
B284
(driver side)
B294
(passenger side)3
PIIB6072E

CLIMATE CONTROLLED SEAT
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Revision: 2007 April2007 M35/M45
Check Climate Controlled Seat Switch Power Supply CircuitNIS0027R
1. CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between climate controlled seat control unit and
ground.
OK or NG
OK >> GO TO 2.
NG >> Replace climate controlled seat control unit.
2. CHECK CLIMATE CONTROLLED SEAT SWITCH POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect climate controlled seat control unit and climate controlled seat switch connector.
3. Check continuity between climate controlled seat control unit
connector and climate controlled seat switch connector.
–Driver side
–Passenger side
4. Check continuity between climate controlled seat control unit
connector and ground.
OK or NG
OK >> Climate controlled seat control unit power supply circuit is OK.
NG >> Repair or replace harness between climate controlled seat control unit and climate controlled seat
switch.
Terminal
Voltage (V)
(Approx.) (+)
(–) Climate controlled
seat control unit
connectorTe r m i n a l
B283
(driver side)
B293
(passenger side)11 Ground Battery voltage
PIIB6073E
AB
Continuity Climate controlled
seat control unit
connectorTe r m i n a lClimate controlled
seat switch
connectorTerminal
B283 11 B430 1 Yes
AC
Continuity Climate controlled
seat control unit
connectorTerminalClimate controlled
seat switch
connectorTerminal
B293 11 B429 1 Yes
A
GroundContinuity Climate controlled
seat control unit
connector
11
B283 (driver side)
B293 (passenger side)No
PIIB6074E

CLIMATE CONTROLLED SEAT
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Revision: 2007 April2007 M35/M45
2. CHECK CLIMATE CONTROLLED SEAT SWITCH HARNESS CIRCUIT
1. Disconnect climate controlled seat control unit connector.
2. Check continuity between climate controlled seat control unit
connector and climate controlled seat switch connector.
–Driver side
–Passenger side
3. Check continuity between climate controlled seat control unit
connector and ground.
OK or NG
OK >> Replace climate controlled seat control unit.
NG >> Repair or replace harness between climate controlled seat control unit and climate controlled seat
switch.
AB
Continuity Climate
controlled seat
control unit
connectorTerminalClimate controlled
seat switch
connectorTerminal
B28310
B4303
Ye s
20 2
AC
Continuity Climate
controlled seat
control unit
connectorTerminalClimate controlled
seat switch
connectorTerminal
B29310
B4293
Ye s
20 2
A
GroundContinuity
Climate controlled seat
control unit connectorTerminal
B283 (driver side)
B293 (passenger side)10
No
20
PIIB6076E

SE-134
CLIMATE CONTROLLED SEAT
Revision: 2007 April2007 M35/M45
Check Climate Controlled Seat Switch Indicator CircuitNIS0027T
1. CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT CUIRCUIT
1. Turn ignition switch ON.
2. Check voltage between climate controlled seat switch connector
and ground.
OK or NG
OK >> GO TO 2.
NG >> Replace climate controlled seat control unit.
Terminal
ConditionVoltage (V)
(Approx.) (+)
(–) Climate
controlled
seat control
unit connectorTerminal
B283
(driver side)
B293
(passenger
side)8
GroundClimate
controlled
seat switchHEAT Battery voltage
Other than above. 0
9Climate
controlled
seat switchCOOL Battery voltage
Other than above. 0
PIIB6077E

CLIMATE CONTROLLED SEAT
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Revision: 2007 April2007 M35/M45
2. CHECK CLIMATE CONTROLLED SEAT SWITCH HARNESS CURCUIT
1. Turn ignition switch OFF.
2. Disconnect climate controlled seat switch and climate controlled seat control unit connector.
3. Check continuity between climate controlled seat control unit
connector and climate controlled seat switch.
–Driver side
–Passenger side
4. Check continuity between climate controlled seat control unit
connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness between climate controlled seat control unit and climate controlled seat
switch.
AB
Continuity Climate
controlled seat
control unit
connectorTerminalClimate controlled
seat switch
connectorTerminal
B2838
B4305
Ye s
94
AC
Continuity Climate
controlled seat
control unit
connectorTerminalClimate controlled
seat switch
connectorTerminal
B2938
B4295
Ye s
94
A
GroundContinuity
Climate controlled seat
control unit connectorTerminal
B283 (driver side)
B293 (passenger side)8
No
9
PIIB6078E