control INFINITI M35 2007 Factory Service Manual

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
SE-145
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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.

SE-152
HEATED SEAT
Revision: 2007 April2007 M35/M45
Terminals and Reference Values for Rear Seat Control UnitNIS00284
Work FlowNIS00285
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 ChartNIS00286

Check that other systems using the signal of the following systems operate normally.
TerminalWire
colorItemSignal
Input/OutputConditionVoltage (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 InputSeat heater HI operation Battery voltage
Other than above 0
6 R/L Seat heater LO signal InputSeat heater LO operation Battery voltage
Other than above 0
8 B/L Ground (power) — — 0
9 W/B Heated seat indicator HI signal OutputHeater HI operation (lit) 0
Other than above Battery voltage
13 B/Y Ground (signal) — — 0
14 W/G Heated seat indicator LO signal OutputHeater LO operation (lit) 0
Other than above Battery voltage
17 W/L Heated seat switch HI signal InputHeated seat switch (HI) – ON (pressed) 0
Heated seat switch (HI) – OFF Battery voltage
18 W Heated seat switch LO signal InputHeated 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
circuitSE-153
Rear heated seat LH or RH do not operate.1. Check rear seat control unit power supply and
ground circuitSE-1542. Check rear heated seat switch circuit SE-156
3. Check rear seatback heater circuit SE-162
4. Replace rear LH or RH seat control unitSE-144
Rear heated seat do not operate with LO or HI position.1. Check rear heated seat switch circuitSE-1562. Check rear heated seat circuitSE-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

SE-154
HEATED SEAT
Revision: 2007 April2007 M35/M45
Check Rear Seat Control Unit Power Supply and Ground CircuitNIS00288
1. CHECK REAR SEAT CONTROL UNIT POWER SUPPLY CIRCUIT (BAT)
1. Turn ignition switch OFF.
2. Check voltage between rear seat control unit connector and
ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness between circuit breaker and rear seat control unit.
2. CHECK REAR SEAT CONTROL UNIT POWER SUPPLY CIRCUIT (IGN)
1. Turn ignition switch ON.
2. Check voltage between rear seat control unit connector and
ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
Terminal
Voltage (V)
(Approx.) (+)
(–)
Rear seat control
unit connectorTerminal
B303 (LH)
B353 (RH)1 Ground Battery voltage
PIIB5997E
Terminal
Voltage (V)
(Approx.) (+)
(–)
Rear seat control
unit connectorTerminal
B303 (LH)
B353 (RH)4 Ground Battery voltage
PIIB5998E

HEATED SEAT
SE-155
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Revision: 2007 April2007 M35/M45
3. CHECK REAR SEAT CONTROL UNIT HARNESS
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R (heated seat relay) and rear seat control unit connector.
3. Check continuity between IPDM E/R (heated seat relay) con-
nector and rear seat control unit connector.
4. Check continuity between rear seat control unit connector and
ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness between rear seat control unit and IPDM E/R (heated seat relay).
4. CHECK REAR SEAT CONTROL UNIT GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear seat control unit connector.
3. Check continuity between rear seat control unit connector and
ground.
OK or NG
OK >> Rear seat control unit power supply and ground circuit is OK.
NG >> Repair or replace harness between rear seat control unit and ground.
AB
Continuity
Rear seat control
unit connectorTerminalIPDM E/R
(heated seat relay)
connectorTerminal
B303 (LH)
4E6 12
Ye s
B353 (RH) E5 9
A
GroundContinuity
Rear seat control unit connector Terminal
B303 (LH)
B353 (RH)4No
PIIB5999E
Terminal
Continuity
Rear seat control
unit connectorTerminal
Ground B303 (LH)
B353 (RH)8
Ye s
B304 (LH)
B354 (RH)13
PIIB6000E

SE-156
HEATED SEAT
Revision: 2007 April2007 M35/M45
Check Rear Heated Seat Switch CircuitNIS00289
1. CHECK REAR HEATED SEAT SWITCH POWER SUPPLY-1
1. Turn ignition switch ON.
2. Check voltage between rear seat control unit connector and
ground.
OK or NG
OK >> Rear heated seat switch circuit is OK.
NG >> GO TO 2.
2. CHECK REAR HEATED SEAT SWITCH HARNESS
1. Turn ignition switch OFF.
2. Disconnect rear heated seat switch and rear seat control unit connector.
3. Check continuity between rear heated seat switch connector
and rear seat control unit connector.
4. Check continuity between rear seat control unit connector and
ground.
OK or NG
OK >> GO TO 3.
NG >> Replace or replace harness between rear seat control unit and rear heated seat switch.
Terminal
ConditionVoltage (V)
(Approx.) (+)
(–) Rear seat
control unit
connectorTerminal
B304 (LH)
B354 (RH)17
GroundRear heated
seat switch HIGH 0
Other than above. 5
18Rear heated
seat switchLOW 0
Other than above. 5
PIIB6001E
AB
Continuity
Rear seat control
unit connectorTe r m i n a lRear heated seat
switch connectorTerminal
B304 (LH)
B354 (RH)17
B507 (LH)
B558 (RH)1
Ye s
18 2
A
GroundContinuity
Rear seat control unit connector Terminal
B304 (LH)
B354 (RH)17
No
18
PIIB6002E

HEATED SEAT
SE-157
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Revision: 2007 April2007 M35/M45
3. CHECK REAR HEATED SEAT SWITCH
Check continuity rear heated seat switch connector.
OK or NG
OK >> GO TO 4.
NG >> Replace rear heated seat switch.
4. CHECK REAR HEATED SEAT SWITCH GROUND CIRCUIT
Check continuity between rear heated seat switch connector and
ground.
OK or NG
OK >> GO TO 5.
NG >> Replace or replace harness between rear heated seat
switch and ground.
5. CHECK REAR HEATED SEAT SWITCH POWER SUPPLY-2
1. Connect rear seat control unit.
2. Turn ignition switch ON.
3. 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.
Rear heated
seat switch
connectorTerminal Condition Continuity
B507 (LH)
B558 (RH)1
3Rear heated
seat switch HIGH Yes
Other than above. No
2Rear heated
seat switchLOW Yes
Other than above. No
PIIB6003E
Terminal
Continuity
Rear heated seat
switch connectorTerminal
Ground
B507 (LH)
B558 (RH)3Yes
PIIB6004E
Terminals
Voltage (V)
(Approx.) (+)
(–)
Rear seat control
unit connectorTerminal
B304 (LH)
B354 (RH)17
Ground 5
18
PIIB6001E

HEATED SEAT
SE-159
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Revision: 2007 April2007 M35/M45
3. CHECK REAR HEATED SEAT SWITCH
Check continuity rear heated seat switch connector.
OK or NG
OK >> Check the condition of the harness and connector.
NG >> Replace rear heated seat switch.
Check Rear Heated Seat Indicator CircuitNIS0028B
1. CHECK REAR SEAT CONTROL UNIT POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between rear seat control unit connector and
ground.
OK or NG
OK >> Replace rear heated seat switch.
NG >> GO TO 2.
Rear heated seat
switch connectorTe r m i n a l
Continuity
(+) (-)
B507 (LH)
B558 (RH)4
6Yes
5
64
No
5
PIIB6007E
Te r m i n a l
ConditionVoltage (V)
(Approx.) (+)
(–) Rear seat
control unit
connectorTerminal
B304 (LH)
B354 (RH)9
GroundRear heated
seat switch HIGH 0
Other than above. Battery voltage
14Rear heated
seat switch LOW 0
Other than above. Battery voltage
PIIB6008E

SE-160
HEATED SEAT
Revision: 2007 April2007 M35/M45
2. CHECK REAR HEATED SEAT INDICATOR HARNESS
1. Turn ignition switch OFF.
2. Disconnect rear seat control unit and rear heated seat switch connector.
3. Check continuity between rear heated seat switch connector
and rear seat control unit connector.
4. Check continuity between rear heated seat switch connector
and ground.
OK or NG
OK >> GO TO 3.
NG >> Replace or replace harness between rear heated seat switch and rear seat control unit.
3. CHECK REAR HEATED SEAT SWITCH
Check continuity rear heated seat switch connector.
OK or NG
OK >> Replace rear seat control unit.
NG >> Replace rear heated seat switch.
AB
Continuity
Rear heated seat
switch connectorTerminalRear seat control
unit connectorTerminal
B507 (LH)
B558 (RH)4
B304 (LH)
B354 (RH)9
Ye s
514
A
GroundContinuity
Rear heated seat
switch connectorTerminal
B507 (LH)
B558 (RH)4
No
5
PIIB6009E
Rear heated seat
switch connectorTerminal
Continuity
(+) (-)
B507 (LH)
B558 (RH)4
6Yes
5
64
No
5
PIIB6007E

HEATED SEAT
SE-161
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Revision: 2007 April2007 M35/M45
Check Rear Heated Seat CircuitNIS0028C
1. CHECK REAR SEAT CONTROL UNIT
1. Turn ignition switch ON.
2. Check voltage between rear seat control unit connector and
ground.
OK or NG
OK >> GO TO 2.
NG >> Replace rear seat control unit.
2. CHECK REAR SEAT HEATER HARNESS
1. Turn ignition switch OFF.
2. Disconnect rear seat control unit and rear seat cushion heater connector.
3. Check continuity between rear seat control unit connector and
rear seat cushion heater connector.
4. Check continuity between rear seat control unit connector and
ground.
OK or NG
OK >> GO TO 3.
NG >> Replace or replace harness between rear seat control unit and rear seat cushion heater.
Te r m i n a l
ConditionVoltage (V)
(Approx.) (+)
(–) Rear seat
control unit
connectorTe r m i n a l
B303 (LH)
B353 (RH)5
GroundRear heated
seat switchHIGH Battery voltage
Other than above. 0
6Rear heated
seat switchLOW Battery voltage
Other than above. 0
PIIB6010E
AB
Continuity
Rear seat control
unit connectorTerminalRear seat cushion
heater connectorTerminal
B303 (LH)
B353 (RH)5
B309 (LH)
B359 (RH)1
Ye s
62
A
GroundContinuity
Rear seat control
unit connectorTerminal
B303 (LH)
B353 (RH)5
No
6
PIIB6011E