INFINITI QX56 2009 Factory Service Manual

THIRD ROW POWER FOLDING SEAT CONTROL UNITSE-29
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DTC IndexINFOID:0000000003775452
NOTE:
To initiate a chime code sequence cycle, turn the ignition switch ON and OFF 3 times within 5 seconds. The
first digit will chime, then a pause, followed by the sec ond digit. For example, a code 13 will have 1 chime, fol-
lowed by a pause, and then 3 chimes. The third row pow er folding seat control unit will clear all codes that
have been corrected after 255 ignition cycles.
ABJIA0092GB
Revision: December 20092009 QX56

SE-30
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THIRD ROW POWER FOLDING SEAT CONTROL UNIT
Fail Safe
INFOID:0000000003775453
The third row power folding seat will not operate under the following conditions:
• Power supply to the third row power folding seat control unit falls below 9.0V
• One of the third row power foldi ng seat switches is stuck closed
• The A/T selector lever is not in PARK position and the ignition switch is ON
DTCMalfunction Service Procedure
11 LH seat has traveled past normal fold
down position 1. Perform Preliminary Check. Refer to
SE-5, "
Preliminary
Check".
2. Check third row power folding seat motor LH Hall signal and ground circuits. Refer to SE-36, "
Third Row Power
Folding Seat Stops Short of it's Fully Up or Down Posi-
tion".
3. Replace third row power folding seat motor LH. Refer to SE-56, "
Exploded View".
12
LH seat has traveled past normal fold up
position
13 LH seat actuation cycle has taken too
long and timed out 1. Perform Preliminary Check. Refer to
SE-5, "
Preliminary
Check".
2. Check third row power folding seat motor LH motor cir- cuits. Refer to SE-33, "
Only One Third Row Power Fold-
ing Seat Will Operate".
3. Replace third row power folding seat motor LH. Refer to SE-56, "
Exploded View".
14 Third row power folding seat control unit
NVRAM data for LH seat position has
been corrupted Replace third row power folding seat control unit. Refer to
SE-
59, "Power seat cross beam".
15 Power supply to thir
d row power folding
seat control unit has been interrupted
during LH seat fold up/down cycle 1. Perform Preliminary Check. Refer to
SE-5, "
Preliminary
Check".
2. Replace third row power folding seat control unit. Refer to SE-59, "
Power seat cross beam".
21 RH seat has traveled past normal fold
down position 1. Perform Preliminary Check. Refer to
SE-5, "
Preliminary
Check".
2. Check third row power folding seat motor RH Hall signal and ground circuits. Refer to SE-36, "
Third Row Power
Folding Seat Stops Short of it's Fully Up or Down Posi-
tion".
3. Replace third row power folding seat motor RH. Refer to SE-56, "
Exploded View".
22
RH seat has traveled past normal fold up
position
23 RH seat actuation cycle has taken too
long and timed out 1. Perform Preliminary Check. Refer to
SE-5, "
Preliminary
Check".
2. Check third row power folding seat motor RH motor cir- cuits. Refer to SE-33, "
Only One Third Row Power Fold-
ing Seat Will Operate".
3. Replace third row power folding seat motor RH. Refer to SE-56, "
Exploded View".
24 Third row power folding seat control unit
NVRAM data for RH seat position has
been corrupted Replace third row power folding seat control unit. Refer to
SE-
59, "Power seat cross beam".
25 Power supply to thir
d row power folding
seat control unit has been interrupted
during RH seat fold up/down cycle 1. Perform Preliminary Check. Refer to
SE-5, "
Preliminary
Check".
2. Replace third row power folding seat control unit. Refer
to SE-59, "
Power seat cross beam".
33 System normal or END of chime codes —
Revision: December 20092009 QX56

THIRD ROW POWER FOLDING SEATSE-31
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SYMPTOM DIAGNOSIS
THIRD ROW POWER FOLDING SEAT
Symptom TableINFOID:0000000003775454
Symptom Reference
None of the third row power folding seats will operate with any switch. Refer to
SE-32, "
None of the Third Row Power Folding
Seats Will Operate With Any Third Row Power Folding
Seat Switch".
Only one third row power folding seat will operate. Refer to
SE-33, "
Only One Third Row Power Folding Seat
Will Operate".
Third row power folding seat will operate in only one direction. Refer to
SE-35, "
Third Row Power Folding Seat Will Oper-
ate in Only One Direction".
Third row power folding seat will stop short of its fully up or down position. Refer to
SE-36, "
Third Row Power Folding Seat Stops
Short of it's Fully Up or Down Position".
Third row power folding seat makes excessive noise while moving. Refer to
SE-37, "
Third Row Power Fold ing Seat Makes Ex-
cessive Noise While Moving".
Seats make squeak or rattle noise. Refer to SE-38, "
Work Flow".
Revision: December 20092009 QX56

SE-32
< SYMPTOM DIAGNOSIS >
NONE OF THE THIRD ROW POWER FOLDING SEATS WILL OPERATE WITH
ANY SWITCH.
NONE OF THE THIRD ROW POWE R FOLDING SEATS WILL OPERATE
WITH ANY SWITCH.
None of the Third Row Power Folding Seat s Will Operate With Any Third Row Power
Folding Seat Switch
INFOID:0000000003775455
1.PRELIMINARY CHECK
Perform preliminary check. Refer to SE-5, "
Preliminary Check".
Are inspection results normal?
YES >> GO TO 2.
NO >> Perform repairs as necessary.
2.THIRD ROW POWER FOLDING SEAT SWITCH GROUND
1. Turn ignition switch OFF.
2. Disconnect any third row power folding seat switch connector.
3. Check continuity between third row power folding seat switch harness connector terminal 4 and ground.
Is there continuity?
YES >> GO TO 3.
NO >> Repair ground circuit.
3.PNP SWITCH SIGNAL
1. Confirm A/T selector lever is in PARK position.
2. Turn ignition switch ON.
3. Check voltage between third row power folding seat control unit harness connector B401 terminal 7 and ground.
Is there battery voltage?
YES >> Replace third row power folding seat control unit. Refer to SE-59, "Power seat cross beam".
NO >> Repair circuit as necessary.
ALJIA0116ZZ
Terminals Ignition switch
(+)
(-)ON
Third row power
folding seat
control unit Te r m i n a l N o .
B401 7Ground Battery voltage
ALJIA0278ZZ
Revision: December 20092009 QX56

ONLY ONE THIRD ROW POWER FOLDING SEAT WILL OPERATE.SE-33
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ONLY ONE THIRD ROW POWER FOLDING SEAT WILL OPERATE.
Only One Third Row Power Folding Seat Will OperateINFOID:0000000003775456
1.PRELIMINARY CHECK
Perform preliminary check. Refer to SE-5, "
Preliminary Check".
Are inspection results normal?
YES >> GO TO 2.
NO >> Perform repairs as necessary.
2.THIRD ROW POWER FOLDING SEAT
Determine which seat is malfunctioning.
Is the affected seat the LH (60%) side?
YES >> GO TO 3.
NO >> GO TO 4.
3.THIRD ROW POWER FOLDING SEAT SWITCH (DRIVER)
1. Turn ignition switch OFF.
2. Disconnect either the front or rear third row power folding seat switch driver side connector.
3. Check continuity between the third row power folding seat switch driver side harness connector B164 or B165 terminal 4
and ground.
4. Check continuity between any third row power folding seat switch driver side harness connector B164 or B165 terminal 2, 3
and third row power folding seat control unit harness connector
B401 terminals 4, 12.
Are inspection results normal?
YES >> GO TO 5.
NO >> Repair circuits as necessary.
4.THIRD ROW POWER FOLDING SEAT SWITCH (PASSENGER)
1. Turn ignition switch OFF.
2. Disconnect either the front or rear third row power folding seat switch passenger side connector.
Te r m i n a l s
Continuity
(+)
(-)
Third row power
folding seat
switch driver side Te r m i n a l N o .
B164 or B165 4Ground Yes
ALJIA0116ZZ
Terminals Continuity
AB
Connector Terminal Connector Terminal
B401 4
B164 or B165 3
Ye s
12 2
AWJIA0245ZZ
Revision: December 20092009 QX56

SE-34
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ONLY ONE THIRD ROW POWER FOLDING SEAT WILL OPERATE.
3. Check continuity between any third row power folding seatswitch passenger side harness connector B162 or B163 termi-
nals 2, 3 and third row power folding seat control unit harness
connector B401 terminals 3, 11.
Is there continuity?
YES >> GO TO 5.
NO >> Repair circuits as necessary.
5.THIRD ROW POWER FOLDING SEAT MOTOR
Check operation of affected third row power folding seat motor. Refer to SE-20, "
Third Row Power Folding
Seat Motor".
Are inspection results normal?
YES >> GO TO 6.
NO >> Replace third row power folding seat motor. Refer to SE-56, "
Exploded View".
6.CHECK CIRCUITS BETWEEN MOTOR AND CONTROL UNIT
Check continuity between third row power folding seat motor har-
ness connector B403 or B426 terminals 3, 4 and third row power
folding seat control unit terminals 17, 19 (LH) or 20, 22 (RH).
Are inspection results normal?
YES >> Replace third row power folding seat control unit. Refer to SE-59, "Power seat cross beam".
NO >> Repair circuits as necessary.
Terminals Continuity
AB
Connector Terminal Connector Terminal
B401 3
B162 or B163 3
Ye s
11 2
AWJIA0246ZZ
Terminals Continuity
AB
Connector Terminal Connector Terminal
B402 17 (LH), 22 (RH)
B403 (LH) or B426 (RH) 4
Ye s
19 (LH), 20 (RH) 3
AWJIA0361ZZ
Revision: December 20092009 QX56

THIRD ROW POWER FOLDING SEAT WILL OPERATE IN ONLY ONE DIREC-TION.
SE-35
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THIRD ROW POWER FOLDING SEAT WI LL OPERATE IN ONLY ONE DI-
RECTION.
Third Row Power Folding Seat Will Operate in Only One DirectionINFOID:0000000003775457
1.PRELIMINARY CHECK
Perform preliminary check. Refer to SE-5, "
Preliminary Check".
Are inspection results normal?
YES >> GO TO 2.
NO >> Perform repairs as necessary.
2.THIRD ROW POWER FOLDING SEAT
Determine which seat is malfunctioning.
Is the affected seat the LH (60%) side?
YES >> GO TO 3.
NO >> GO TO 4.
3.THIRD ROW POWER FOLDING SEAT SWITCH (DRIVER)
1. Turn ignition switch OFF.
2. Disconnect any third row power folding seat switch driver side connector.
3. Check continuity between third row power folding seat switch driver side harness connector B164 or B165 terminal 2, 3 and
third row power folding seat control unit harness connector B401
terminals 4, 12.
Is there continuity?
YES >> Replace third row power folding seat control unit. Refer to SE-59, "Power seat cross beam".
NO >> Repair circuits as necessary.
4.THIRD ROW POWER FOLDING SEAT SWITCH (PASSENGER)
1. Turn ignition switch OFF.
2. Disconnect either the front or rear third row power folding seat switch passenger side connector.
3. Check continuity between third row power folding seat switch passenger side harness connector B162 or B163 terminals 2, 3
and third row power folding seat control unit harness connector
B401 terminals 3, 11.
Is there continuity?
YES >> Replace third row power folding seat control unit. Refer to SE-59, "Power seat cross beam"
NO >> Repair circuits as necessary.
TerminalsContinuity
AB
Connector Terminal Connector Terminal
B401 4
B164 or B165 3
Ye s
12 2
AWJIA0247ZZ
Terminals Continuity
AB
Connector Terminal Connector Terminal
B401 3
B162 or B163 3
Ye s
11 2
AWJIA0248ZZ
Revision: December 20092009 QX56

SE-36
< SYMPTOM DIAGNOSIS >
THIRD ROW POWER FOLDING SEAT WILL STOP SHORT OF IT’S FULLY UP
OR DOWN POSITION.
THIRD ROW POWER FOLDING SEAT WI LL STOP SHORT OF IT’S FULLY
UP OR DOWN POSITION.
Third Row Power Folding Seat Stops Short of it's Fully Up or Down Position
INFOID:0000000003775458
1.PRELIMINARY CHECK
Perform preliminary check. Refer to SE-5, "
Preliminary Check".
Are inspection results normal?
YES >> GO TO 2.
NO >> Perform repairs as necessary.
2.CHECK HISTORY
Check to see if a previous normal seat folding operation was interrupted due to low voltage condition.
Was voltage interrupted?
YES >> Perform learn procedure by operating affected seat until seat reaches full open/closed position.
NO >> GO TO 3.
3.THIRD ROW POWER FOLDING SEAT MOTOR
1. Turn ignition switch OFF.
2. Disconnect third row power folding seat motor harness connec- tor and third row power folding seat control unit harness connec-
tor.
3. Check continuity between third row power folding seat motor
harness connector B403 (LH) or B426 (RH) terminals 1, 2 and
third row power folding seat control unit harness connector ter-
minals 10, 15 (LH) or 9, 15 (RH).
Is there continuity?
YES >> Replace affected third row power folding seat motor. Refer to SE-56, "Exploded View".
NO >> Repair circuits as necessary.
Te r m i n a l s Continuity
Connector Terminal Connector Terminal
A: B401 9 (RH)
C: B426 (RH)
1
Ye s
10 (LH)
C: B403 (LH)
B: B402 15 (LH/RH) C: B426 (RH)
2
C: B403 (LH)
AWJIA0362ZZ
Revision: December 20092009 QX56

THIRD ROW POWER FOLDING SEAT MAKES EXCESSIVE NOISE WHILE MOV-
ING.
SE-37
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THIRD ROW POWER FOLDING SEA T MAKES EXCESSIVE NOISE WHILE
MOVING.
Third Row Power Folding Seat Ma kes Excessive Noise While MovingINFOID:0000000003775459
1.PRELIMINARY CHECK
Perform preliminary check. Refer to SE-5, "
Preliminary Check".
Are inspection results normal?
YES >> Inspect shaft assembly for binding. If OK, replace affected third row power folding seat motor. Refer to SE-56, "
Exploded View".
NO >> Perform repairs as necessary.
Revision: December 20092009 QX56

SE-38
< SYMPTOM DIAGNOSIS >
SQUEAK AND RATTLE TROUBLE DIAGNOSES
SQUEAK AND RATTLE TROUBLE DIAGNOSES
Work FlowINFOID:0000000003775460
CUSTOMER INTERVIEW
Interview the customer if possible, to determine the conditions that exist when the noise occurs. Use the Diag-
nostic Worksheet during the interview to document the facts and conditions when the noise occurs and any
customer's comments; refer to SE-42, "
Diagnostic Worksheet". This information is necessary to duplicate the
conditions that exist when the noise occurs.
• The customer may not be able to provide a detailed description or the location of the noise. Attempt to obtain all the facts and conditions that exist w hen the noise occurs (or does not occur).
• If there is more than one noise in the vehicle, be sure to diagnose and repair the noise that the customer is
concerned about. This can be accomplished by test driving the vehicle with the customer.
• After identifying the type of noise, isolate the noise in terms of its characteristics. The noise characteristics
are provided so the customer, service adviser and technician are all speaking the same language when
defining the noise.
• Squeak —(Like tennis shoes on a clean floor)
Squeak characteristics include the light contact/fast movement/brought on by road conditions/hard surfaces
= higher pitch noise/softer surfaces = lower pitch noises/edge to surface = chirping.
• Creak—(Like walking on an old wooden floor)
Creak characteristics include firm contact/slow mo vement/twisting with a rotational movement/pitch depen-
dent on materials/often brought on by activity.
• Rattle—(Like shaking a baby rattle)
Rattle characteristics include the fast repeated contac t/vibration or similar movement/loose parts/missing
clip or fastener/incorrect clearance.
• Knock —(Like a knock on a door)
Knock characteristics include hollow sounding/someti mes repeating/often brought on by driver action.
• Tick—(Like a clock second hand) Tick characteristics include gentle contacting of light materials/loose components/can be caused by driver
action or road conditions.
• Thump—(Heavy, muffled knock noise) Thump characteristics include softer k nock/dead sound often brought on by activity.
• Buzz—(Like a bumble bee)
Buzz characteristics include hi gh frequency rattle/firm contact.
• Often the degree of acceptable noise level will vary depending upon the person. A noise that you may judge as acceptable may be very irritating to the customer.
• Weather conditions, especially humidity and temperat ure, may have a great effect on noise level.
DUPLICATE THE NOISE AND TEST DRIVE
If possible, drive the vehicle with the customer until the noise is duplicated. Note any additional information on
the Diagnostic Worksheet regarding the conditions or lo cation of the noise. This information can be used to
duplicate the same conditions when you confirm the repair.
SBT842
Revision: December 20092009 QX56