control unit INFINITI M35 2007 Factory Service Manual

SE-136
CLIMATE CONTROLLED SEAT
Revision: 2007 April2007 M35/M45
3. CHECK CLIMATE COMTROLLED SEAT SWICH INDICATOR
Check continuity between climate controlled seat switch.
*: Driver side
OK or NG
OK >> Check the condition of the harness and the connector.
NG >> Replace climate controlled seat switch.
Check Seat Cushion Thermal Electric Device Circuit NIS0027U
1. CHECK SEAT CUSHION THERMAL ELECTRIC DEVICE POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between climate controlled seat control unit con-
nector and ground.
OK or NG
OK >> Seat cushion thermal electric device circuit is OK.
NG >> GO TO 2.
Climate controlled seat switch
connectorTerminal Continuity
(+) (–)
B430 (driver side)
B429 (passenger side)4
6No
5
64
Ye s
5
PIIB6079E
Terminal
ConditionVoltage (V)
(Approx.) (+)
(–) Climate
controlled seat
control unit
connectorTe r m i n a l
B283
(driver side)
B293
(passenger
side)5
GroundClimate
controlled
seat switchHEAT or
COOL0 - Battery
voltage
Other than above. 0
6Climate
controlled
seat switchCOOL or
HEAT0 - Battery volt-
age
Other than above. 0
PIIB6080E

CLIMATE CONTROLLED SEAT
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Revision: 2007 April2007 M35/M45
2. 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 and seat cushion thermal electric device connector.
4. Check continuity between climate controlled seat control unit connector and ground.
OK or NG
OK >> Check the condition of the harness and the connector.
NG >> Repair or replace harness between climate controlled seat control unit and seat cushion thermal
electric device.
Check Seatback Thermal Electric Device CircuitNIS0027V
1. CHECK SEATBACK THERMAL ELECTRIC DEVICE POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between climate controlled seat control unit con-
nector and ground.
OK or NG
OK >> Seatback thermal electric device circuit is OK.
NG >> GO TO 2.
AB
Continuity Climate
controlled seat
control unit
connectorTerminalSeat cushion
thermal electric
device
connectorTerminal
B283
(driver side)
B293
(passenger side)5 B285
(driver side)
B295
(passenger side)4
Ye s
66
A
GroundContinuity
Climate controlled seat
control unit connectorTerminal
B283 (driver side)
B293 (passenger side)5
No
6
PIIB6081E
Terminal
ConditionVoltage (V)
(Approx.) (+)
(–) Climate
controlled
seat control
unit connectorTerminal
B283
(driver side)
B293
(passenger
side)15
GroundClimate
controlled
seat switchHEAT or
COOL0 - Battery
voltage
Other than above. 0
16Climate
controlled
seat switchCOOL or
HEAT0 - Battery
voltage
Other than above. 0
PIIB6082E

SE-138
CLIMATE CONTROLLED SEAT
Revision: 2007 April2007 M35/M45
2. CHECK SEATBACK THERMAL ELECTRIC DEVICE HARNESS
1. Turn ignition switch OFF.
2. Disconnect climate controlled seat control unit connector and seatback thermal electric device connector.
3. Check continuity between climate controlled seat control unit
connector and seatback thermal electric device connector.
4. Check continuity between climate controlled seat control unit connector and ground.
OK or NG
OK >> Check the condition of the harness and the connector.
NG >> Repair or replace harness between climate controlled seat control unit and seatback thermal elec-
tric device.
Check Seat Cushion Thermal Electric Device Sensor CircuitNIS0027W
1. CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between climate controlled seat control unit con-
nector and ground.
OK or NG
OK >> Climate controlled seat control unit circuit is OK.
NG >> GO TO 2.
AB
Continuity Climate
controlled seat
control unit
connectorTe r m i n a lSeatback thermal
electric device
connectorTerminal
B283
(driver side)
B293
(passenger side)15 B285
(driver side)
B295
(passenger side)4
Ye s
16 6
A
GroundContinuity
Climate controlled seat
control unit connectorTerminal
B283 (driver side)
B293 (passenger side)15
No
16
PIIB6083E
Terminal
ConditionVoltage (V)
(Approx.) (+)
(–) Climate
controlled seat
control unit
connectorTerminal
B283
(driver side)
B293
(passenger side)22 GroundBlower motor
operated0.5 - 4
PIIB6084E

CLIMATE CONTROLLED SEAT
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Revision: 2007 April2007 M35/M45
2. CHECK SEAT CUSHION THERMAL ELECTRIC DEVICE SENSOR 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 and seat cushion thermal electric device connector.
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 seat cushion thermal
electric device.
3. CHECK SEAT CUSHION THERMAL ELECTRIC DEVICE SENSOR
Check resistance between seat cushion thermal electric device con-
nector.
OK or NG
OK >> Check the condition of the harness and the connector.
NG >> Replace seat cushion thermal electric device.
AB
Continuity Climate
controlled seat
control unit
connectorTerminalSeat cushion
thermal electric
device connectorTerminal
B283
(driver side)
B293
(passenger side)21 B285
(driver side)
B295
(passenger side)2
Ye s
22 1
A
GroundContinuity
Climate controlled seat
control unit connectorTerminal
B283 (driver side)
B293 (passenger side)21
No
22
PIIB6085E
Seat cushion thermal
electric device connectorTe r m i n a l Resistance (KΩ)
(Approx.)
B220
(driver side)
B258
(passenger side)12 2
PIIB6086E

SE-140
CLIMATE CONTROLLED SEAT
Revision: 2007 April2007 M35/M45
Check Seatback Thermal Electric Device Sensor Circuit NIS0027X
1. CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between climate controlled seat control unit con-
nector and ground.
OK or NG
OK >> Climate controlled seat control unit circuit is OK.
NG >> GO TO 2.
2. CHECK SEATBACK THERMAL ELECTRIC DEVICE SENSOR HARNESS
1. Turn ignition switch OFF.
2. Disconnect climate controlled seat control unit connector and seatback thermal electric device connector.
3. Check continuity between climate controlled seat control unit
connector and seatback thermal electric device connector.
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 seat control unit and seatback thermal electric device.
Terminal
ConditionVoltage (V)
(Approx.) (+)
(–) Climate
controlled seat
control unit
connectorTerminal
B283
(driver side)
B293
(passenger side)23 GroundBlower motor
operated0.5 - 4
PIIB6087E
AB
Continuity Climate
controlled seat
control unit
connectorTe r m i n a lSeatback thermal
electric device
connectorTerminal
B283
(driver side)
B293
(passenger side)23 B220
(driver side)
B258
(passenger side)1
Ye s
24 2
A
GroundContinuity
Climate controlled seat
control unit connectorTerminal
B283 (driver side)
B293 (passenger side)23
No
24
PIIB6088E

CLIMATE CONTROLLED SEAT
SE-141
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SE
Revision: 2007 April2007 M35/M45
3. CHECK SEATBACK THERMAL ELECTRIC DEVICE SENSOR
Check resistance between seatback thermal electric device connec-
tor.
OK or NG
OK >> Check the condition of the harness and the connector.
NG >> Replace seatback thermal electric device.
Check Climate Controlled Seat Blower Motor CircuitNIS0027Y
1. CHECK CLIMATE CONTROLLED SEAT BLOWER MOTOR CIRCUIT HARNESS
1. Turn ignition switch OFF.
2. Disconnect climate controlled seat control unit and climate controlled seat blower motor connector.
3. Check continuity between climate controlled seat control unit
connector and climate controlled seat blower motor connector.
4. Check continuity between climate controlled seat control unit connector and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness between climate controlled seat control unit and climate controlled seat
blower motor.
Seatback thermal electric
device connectorTerminal Resistance
(KΩ)
(Approx.)
B220
(driver side)
B258
(passenger side)12 2
PIIB6086E
AB
Continuity Climate
controlled seat
control unit
connectorTerminalClimate controlled
seat blower motor
connectorTerminal
B283
(driver side)
B293
(passenger side)7
B282
(driver side)
B292
(passenger side)3
Ye s 14 2
17 4
18 1
A
GroundContinuity
Climate controlled seat
control unit connectorTerminal
B283
(driver side)
B293
(passenger side)7
No 14
17
18
PIIB6089E

SE-142
CLIMATE CONTROLLED SEAT
Revision: 2007 April2007 M35/M45
2. CHECK CLIMATE CONTROLLED SEAT BLOWER MOTOR POWER SUPPLY CIRCUIT
1. Connect climate controlled seat control unit connector and blower motor 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 3.
NG >> Replace climate controlled seat control unit.
3. CHECK CLIMATE CONTROLLED SEAT BLOWER MOTOR SPEED CONTROL SIGNAL CIRCUIT
Check voltage between climate controlled seat control unit connec-
tor and ground.
OK or NG
OK >> GO TO 4.
NG >> Replace climate controlled seat control unit.
4. CHECK CLIMATE CONTROLLED SEAT BLOWER MOTOR TACHOMETER SIGNAL CIRCUIT
Check voltage between climate controlled seat control unit connec-
tor and ground.
OK or NG
OK >> Climate controlled seat blower motor circuit is OK.
NG >> Replace climate controlled seat blower motor.
Terminal
Voltage (V)
(Approx.) (+)
(–)
Climate controlled seat
control unit connectorTe r m i n a l
B283 (driver side)
B293 (passenger side)14 Ground Battery voltage
PIIB6090E
Terminal
ConditionVoltage (V)
(Approx.) (+)
(–) Climate
controlled
seat control
unit connectorTerminal
B283
(driver side)
B293
(passenger
side)17 GroundClimate
controlled
seat switchHEAT or
COOL4.5 - 8.0
Other than above. 0
PIIB6091E
Terminal
ConditionVoltage (V)
(Approx.) (+)
(–) Climate
controlled
seat control
unit connectorTerminal
B283
(driver side)
B293
(passenger
side)18 GroundClimate
controlled
seat switchHEAT or
COOL4.5 - 8.0
Other than above.Battery
voltage
PIIB6092E

CLIMATE CONTROLLED SEAT
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Revision: 2007 April2007 M35/M45
Check Climate Controlled Seat Control UnitNIS0027Z
1. CHECK THE CLIMATE CONTROLLED SEAT CONTROL UNIT
Does the heater operate normally when the driver side or passenger side climate controlled seat control unit is
exchanged?
YES or NO
YES >> Climate controlled seat control unit is OK.
NO >> Replace climate controlled seat control unit.

SE-144
HEATED SEAT
Revision: 2007 April2007 M35/M45
HEATED SEATPFP:87335
Component Parts and Harness Connector LocationNIS00280
System Description NIS00281
NOTE:

When handling seat, be extremely careful not to scratch heating unit

To replace heating unit, seat trim and pad should be separated.

Do not use any organic solvent, such as thinner, benzene, alcohol, etc. to clean trims.
Power is all time supplied

to rear LH seat control unit and rear RH seat control unit terminal 1.

through 50A fusible link [Letter F, located in the fuse block (J/B)],

to IPDM E/R (heated seat relay) terminal 14.

through 15A fuse [No.38, located in the fuse block (J/B)].
With the ignition switch to ON or START position, power is supplied

to rear LH seat control unit terminal 4 and

to rear heated seat switch LH terminal 6.

through IPDM E/R (heated seat relay) terminal 12

to rear RH seat control unit terminal 4 and

to rear heated seat switch RH terminal 6

through IPDM E/R (heated seat relay) terminal 9.
1. Fuse, fusible link and relay block (J/B) 2. IPDM E/R E5, E6, E9 3. Heated seat relay E5, E6, E9
(Built into the IPDM E/R)
4. a: Rear heated seat switch LH B507
b: Rear heated seat switch RH B5585. Rear seat control unit
B303, B304 (LH)
B353, B354 (RH)
(View with the rear seatback
removed)
PIIB5890E

HEATED SEAT
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Revision: 2007 April2007 M35/M45
When rear heated seat switch (LH, RH) is LOW position, ground is suppled

to rear seat control unit terminal 18,

through rear heated seat switch terminal 2,

through rear heated seat switch terminal 3,

through body grounds B5, B40 and B131
Then rear seat control unit recognizes that rear heated seat switch is LOW position.
When rear heated seat switch is LOW position, power is supplied

through rear seat control unit terminal 6,

through rear seat cushion heater terminal 2,

through rear seat cushion heater terminal 3,

to rear seatback heater terminal 1.
Then ground is suppled

to rear seatback heater terminal 2.

through body grounds B5, B40 and B131.
With power and ground supplied, rear heated seat is operated.
When rear heated seat switch is in LOW position, ground is supplied

to rear heated seat switch terminal 5,

through rear seat control unit terminal 14,

through rear seat control unit terminal 13,

through body grounds B5, B40 and B131.
With power and ground supplied, rear heated seat switch LOW position indicator is illuminated
When rear heated seat switch (LH, RH) is in HIGH position, ground is suppled

to rear seat control unit terminal 17,

through rear heated seat switch terminal 1,

through rear heated seat switch terminal 3,

through body grounds B5, B40 and B131
Then rear seat control unit recognizes that rear heated seat switch is in HIGH position.
When rear heated seat switch is in HIGH position, power is supplied

through rear seat control unit terminal 5,

through rear seat cushion heater terminal 1,

through rear seat cushion heater terminal 3,

to rear seatback heater terminal 1.
Then ground is suppled

to rear seatback heater terminal 2.

through body grounds B5, B40 and B131.

to rear seat cushion heater terminal 2,

through rear seat control unit terminal 6,

through rear seat control unit terminal 8,

through body grounds B5, B40 and B131.
With power and ground supplied, rear heated seat generates heat more than the time of LOW position.
When rear heated seat switch is in HIGH position, ground is supplied

to rear heated seat switch terminal 4,

through rear seat control unit terminal 9,

through rear seat control unit terminal 13,

through body grounds B5, B40 and B131.
With power and ground supplied rear heated seat switch HIGH position indicator is illuminated.