2011 INFINITI QX56 ECO mode

SE-22
< ECU DIAGNOSIS INFORMATION >
CLIMATE CONTROLLED SEAT CONTROL UNIT
Malfunction Malfunctioning condition
The temperature difference between the seatback ther-
mal electric unit and seat cushion thermal electric unit is
more than 30 °C  When it detects for 4 seconds that the temperature difference between
the seatback thermal electric unit and seat cushion thermal electric unit
is more than 30 °, it stops the output to the thermal electric unit, activates
the climate controlled seat blower motor at the maximum position, and
sends the external airflow for 30 seconds
 If the temperature difference is still more than 30 °C after 30 seconds
pass, it stops all output and enters the system OFF condition
 When the temperature difference between seatback thermal electric unit and seat cushion thermal electric unit becomes less than 20 °C, the sys-
tem recovers automatically
 If it detects that the temperature difference is more than 30 °C after the
automatic system recovery, it immediately stops all output and enters the
system OFF condition
NOTE:
When the switch operation is performed before entering the system OFF
condition, the fail-safe mode is reset.
The temperature of thermal electric unit is more than
11 0 °C in the HEAT mode (any thermal electric unit in the
seatback or seat cushion)  When it detects for 4 seconds that the temperature of the thermal electric
unit is more than 110 °C, it stops the output to the thermal electric unit,
activates the climate controlled seat blower motor at the maximum posi-
tion, and sends the external airflow for 30 seconds
 If the temperature does not become less than 105 °C after 30 seconds
pass, it stops all output and enters the system OFF condition
 When the temperature of the thermal electric unit becomes less than 105 °C, the system recovers automatically
 If it detects that the temperature of the thermal electric unit is more than
11 0 °C after the automatic system recovery, it immediately stops all out-
put and enters the system OFF condition
The temperature of the thermal electric unit is more than
45 °C in the COOL mode (any thermal electric unit in the
seatback or seat cushion)  When it detects for 4 seconds that the temperature of the thermal electric
unit is more than 45 °C and less than 70 °C, it starts the temperature mon-
itoring of the thermal electric unit at 3 second intervals for increase in
temperature from the previous value
 While monitoring, if it detects that the temperature continuously rises 2 °C
or more for 4 consecutive intervals or reaches 70 °C or more, it stops all
output and enters the system OFF condition
 If it detects other results of monitoring, it continues activating in the se-
lected COOL mode
Thermal electric unit sensor open circuit
(in either the back and the cushion TEU)  When it detects for 4 seconds that the thermal electric unit sensor is an
open circuit, it stops all output and enters the system OFF condition
Climate controlled seat blower motor system open circuit
(in either the back and the cushion blower)  When it detects for 2 seconds that climate controlled seat blower motor
is an open circuit while the climate controlled seat is being activated, and
the battery status has been stable for the same 2 second period, it stops
output to the thermal electric unit
 When it detects for 10 seconds that the climate controlled seat blower motor is an open circuit while the climate controlled seat is being activat-
ed, and the battery status has been stable for the same 10second period,
it stops all output and enters the system OFF condition
NOTE:
After detecting the climate seat blower motor system open circuit for 2
seconds, the system recovers automatically if the activation of the cli-
mate controlled seat blower motor is detected for 1 second or more.
Switch input out of the specified range
(either heat input or cool input)  When it detects for 4 seconds that the rotary switch input is less than
30% of the vehicle battery voltage, it stops all output and enters the sys-
tem OFF condition
 When the switch input returns to a value within the specified range, the
system recovers automatically
Revision: 2010 May2011 QX56

CLIMATE CONTROLLED SEAT CONTROL UNITSE-23
< ECU DIAGNOSIS INFORMATION >
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*: System voltage is the voltage between the climate controlled seat control unit power source and ground.
NOTE:
When the ignition status changes to OFF during the fail-safe mode, the control unit shall enter the OFF condition. If the ignit ion is turned
ON, the system shall return to the standby mode. If the system en ters in the fail-safe mode again after performing ignition cycle, start the
diagnosis. HEAT or COOL switch input out of the specified range
 During the standby mode, heating or cooling states, if the rotary switch
input is less than 6% of the vehicle battery voltage, it stops all output and
enters the system OFF condition
 When the switch input returns to a value within the specified range, the system recovers automatically
System voltage out of range  If the system voltage at the climate controlled seat control unit falls out-
side of the 8.5 to 16.5 V operating range, it stops all output after a 500ms
time period.
 When the system voltage returns to the normal operating range (10.5-
15.5V with a 500ms hysteresis), the system recovers automatically.
Malfunction Malfunctioning condition
Revision: 2010 May2011 QX56

SECOND SEATSE-121
< REMOVAL AND INSTALLATION >
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*: Heater seat model only.
BENCH SEAT (RH SEAT) AND CAPTAIN SEAT (RH SEAT)
1. Headrest LH 2. Headrest (center) 3. Headrest holder (free)
4. Headrest holder (locked) 5. Seatback heater unit
*6. Seatback trim
7. Seatback pad 8. Armrest outer cover 9. Armrest outer bracket
10. Bush 11. Armrest inner cover RH 12. Armrest trim
13. Armrest pad & frame 14. Armrest inner cover LH 15. Cup holder
16. Reclining inner cover (outside) 17. Seat inner hinge 18. Reclining device inner cover (out- side)
19. Reclining device inner cover (inside) 20. Seat cushion heater unit
*21. Seat cushion trim
22. Seat cushion pad 23. Seat hinge cover RH 24. Seat cushion hinge cover RH
25. Seat hinge cover LH 26. Seat cushion hinge cover LH 27. Seat cushion under cover
28. Seat harness assembly 29. Device arm cover 30. Reclining device outer cover (inside)
31. Reclining device outer cover (out- side) 32. Snap ring 33. Reclining lever knob
34. Anchor bolt 35. Seat belt buckle (center) 36. Seat belt buckle LH
37. Center seat belt retractor 38. Screw cap 39. Seatback center finisher
40. Seatback center finisher cover 41. Center seat belt shoulder guide 42. Seatback board
43. Seatback board clip 44. Center seat belt guide 45. Rear seat lever assembly
46. Seat control lever escutcheon 47. Seatback frame 48. Seat cushion frame
49. Seat hinge assembly RH 50. Seat cushion carpet RH 51. Seat hinge assembly LH
52. Seat cushion carpet LH : Pawl
Refer to GI-4, "
Components" for symbols in the figure.
Revision: 2010 May2011 QX56

SECOND SEATSE-123
< REMOVAL AND INSTALLATION >
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*: Heater seat model only.
CAPTAIN SEAT (LH SIDE)
19. Seat control lever escutcheon 20. Rear seat lever assembly 21. Seatback board
22. Seatback board clip 23. Seatback heater unit
*24. Reclining lever knob
25. Snap ring 26. Reclining device outer cover (out- side)27. Reclining device outer cover (inside)
28. Seat cushion frame 29. Seat hinge assembly RH 30. Seat hinge assembly LH : Pawl
Refer to GI-4, "
Components" for symbols in the figure.
Revision: 2010 May2011 QX56

SECOND SEATSE-127
< REMOVAL AND INSTALLATION >
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(heater seat model only)
5. Remove the rear seat lever assembly. 1. Remove the rear seat lever assembly fixing screws.
2. Lift rear seat lever assembly and remove seatback control wire.
6. Remove the seatback center finisher. 1. Pull seatback center finisher cover rearward to remove.
2. Remove the seatback center finisher fixing screws.
3. Remove the seat belt from seatback center finisher.
7. Remove the center seat belt anchor. 1. Remove the seat cushion and seat cushion under cover.
Refer to SE-130, "
SEAT CUSHION : Disassembly and Assembly".
2. Remove the center seat belt anchor. Refer to SB-13, "
SEAT BELT RETRACTOR : Removal and Installation".
8. Remove the seatback trim and seatback pad. 1. Remove the headrest holder. CAUTION:
Before installing headrest holder check its orientation.
(front/rear and right/left)
JMJIA4471ZZ
: Pawl
JMJIA3877ZZ
PIIB4084J
Revision: 2010 May2011 QX56

SECOND SEATSE-129
< REMOVAL AND INSTALLATION >
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1. Slide and align the clips (B) to the holes on the seatback as shown in the figure, and then remove the seatback board
(A).
2. Remove the clips after removing the seatback board.
3. Disconnect the seatback heater unit harness connector (A).
(heater seat model only)
4. Remove the rear seat lever assembly. 1. Remove the rear seat lever assembly fixing screws.
2. Lift rear seat lever assembly and remove seatback control wire.
5. Remove the seatback trim and seatback pad. 1. Remove the headrest holder. CAUTION:
Before installing headrest holder check its orientation.
(front/rear and right/left)
2. Roll up seatback trim (2) from backward to forward so that seat control lever escutcheon (1) is visible.
3. Remove the seat control lever escutcheon (1).
4. Remove the seatback trim and seat back pad from the seatback frame.
5. Remove the hog rings, and separate the seatback trim and seatback pad.
6. Remove the seatback frame.
JMJIA4076ZZ
JMJIA4262ZZ
PIIB4084J
: Pawl
JMJIA3878ZZ
Revision: 2010 May2011 QX56

SE-130
< REMOVAL AND INSTALLATION >
SECOND SEAT
1. Remove the reclining device outer cover (outside) and reclining device outer cover (inside).
Refer to SE-130, "
SEAT CUSHION : Disassembly and Assembly".
2. Remove the seatback control wire (A) and seat cushion
control wire (B).
3. Remove the reclining inner cover (outside).
4. Remove the mounting bolts and then remove seatback frame.
ASSEMBLY
Assemble in the reverse order of disassembly.
CAUTION:
 Install the hog rings of seat trim in position, and then securely connect the trim or trim cord with the
seat frame.
 Adjust the cable when installing the seatback control wire and seat cushion control wire.
Refer to SE-134, "
Adjustment".
SEAT CUSHION
SEAT CUSHION : Disa ssembly and AssemblyINFOID:0000000006217432
DISASSEMBLY
BENCH SEAT (LH SIDE)
1. Remove the seat cushion trim and seat cushion pad.
1. Remove the seat cushion retainer.
2. Move seat cushion so that harness connector (A) of seatcushion heater is visible. (heater seat model only)
3. Disconnect the seat cushion heater unit harness connector (A). (heater seat model only)
4. Remove the seat cushion trim and seat cushion pad from the seat cushion frame.
5. Remove the hog rings and separate the seat cushion trim and seat cushion pad.
2. Remove the reclining lever knob. Remove snap ring (1) downward using a hook and pick tool.
Remove reclining lever knob (2).
JMJIA3886ZZ
JMJIA4472ZZ
JMJIA3881ZZ
Revision: 2010 May2011 QX56

SE-132
< REMOVAL AND INSTALLATION >
SECOND SEAT
 Disengage pawls on front side of seat cushion hinge cover.
 Disengage pawls on rear side of seat cushion hinge cover.
12. Remove the mounting bolts and then remove seat hinge assembly.
BENCH SEAT (RH SIDE) AND CAPTAIN SEAT
1. Remove the seat cushion trim and seat cushion pad. 1. Remove the seat cushion retainer.
2. Move seat cushion so that harness connector (A) of seatcushion heater is visible. (heater seat model only)
3. Disconnect the seat cushion heater unit harness connector (A). (heater seat model only)
4. Remove the seat cushion trim and seat cushion pad from the seat cushion frame.
5. Remove the hog rings and separate the seat cushion trim and seat cushion pad.
2. Remove the reclining lever knob. Remove the snap ring (1) downward using a hook & pick tool.
Remove the reclining lever knob (2).
3. Remove the reclining device outer cover (outside) Pull reclining device outer cover forward and disengage pawls.
4. Remove the reclining device outer cover (inside).
: Pawl
JMJIA3883ZZ
JMJIA4263ZZ
JMJIA3881ZZ
: Pawl
JMJIA3882ZZ
Revision: 2010 May2011 QX56