ECU INFINITI QX56 2008 Factory Service Manual

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BODY INTERIOR
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SECTION SE
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CONTENTS
SEAT
BASIC INSPECTION ....... .............................3
DIAGNOSIS AND REPAIR WORKFLOW ..... .....3
Work Flow ........................................................... ......3
INSPECTION AND ADJUSTMENT .....................5
Preliminary Check ............................................... ......5
FUNCTION DIAGNOSIS ...............................6
THIRD ROW POWER FOLDING SEAT ......... .....6
System Description ............................................. ......6
Component Parts Location ........................................7
Component Description .............................................7
COMPONENT DIAGNOSIS ..........................8
POWER SEAT .....................................................8
Wiring Diagram — Passenger Side — ................ ......8
HEATED SEAT ...................................................12
Description ..............................................................12
Wiring Diagram .......................................................13
THIRD SEAT ......................................................18
Power Supply and Ground Circuit Check for Third
Row Power Folding Seat Control Unit ................. ....
18
Third Row Power Folding Seat Switch ....................19
Third Row Power Folding Seat Motor .....................19
ECU DIAGNOSIS .........................................21
THIRD ROW POWER FOLDING SEAT CON-
TROL UNIT .........................................................
21
Reference Value ................................................. ....21
Wiring Diagram .......................................................23
DTC Index ...............................................................28
Fail Safe ..................................................................29
SYMPTOM DIAGNOSIS ..............................30
THIRD ROW POWER FOLDING SEAT ......... ....30
Symptom Table ................................................... ....30
NONE OF THE THIRD ROW POWER FOLD-
ING SEATS WILL OPERATE WITH ANY
SWITCH. ............................................................
31
None of the Third Row Power Folding Seats Will
Operate With Any Third Row Power Folding Seat
Switch .................................................................. ....
31
ONLY ONE THIRD ROW POWER FOLDING
SEAT WILL OPERATE. ....................................
32
Only One Third Row Power Folding Seat Will Op-
erate .................................................................... ....
32
THIRD ROW POWER FOLDING SEAT WILL
OPERATE IN ONLY ONE DIRECTION. ...........
34
Third Row Power Folding Seat Will Operate in
Only One Direction .............................................. ....
34
THIRD ROW POWER FOLDING SEAT WILL
STOP SHORT OF IT’S FULLY UP OR DOWN
POSITION. .........................................................
35
Third Row Power Folding Seat Stops Short of its
Fully Up or Down Position .......................................
35
THIRD ROW POWER FOLDING SEAT
MAKES EXCESSIVE NOISE WHILE MOV-
ING. ...................................................................
36
Third Row Power Folding Seat Makes Excessive
Noise While Moving ............................................. ....
36
SQUEAK AND RATTLE TROUBLE DIAG-
NOSES ..............................................................
37
Work Flow ................................................................37
Generic Squeak and Rattle Troubleshooting ...........39
Diagnostic Worksheet ..............................................41
PRECAUTION ..............................................43
PRECAUTIONS .................................................43
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ....
43
Revision: March 2010 2008 QX56

THIRD ROW POWER FOLDING SEAT CONTROL UNITSE-21
< ECU DIAGNOSIS >
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ECU DIAGNOSIS
THIRD ROW POWER FOLD ING SEAT CONTROL UNIT
Reference ValueINFOID:0000000001735721
TERMINAL LAYOUT
PHYSICAL VALUES
ALJIA0277ZZ
Te r m i n a l N o .
Wire
color Description
ConditionVoltage (V)
(Approx.)
+ - Signal nameInput/
Output
1 Ground Y/R Battery Input— Battery voltage
3Ground LG 40% seat switch signal
(down) OutputPush either third row power fold-
ing seat switch passenger (down) 0
Third row power folding seat switch passenger released Battery voltage
4Ground V 60% seat switch signal
(down) OutputPush either third row power fold-
ing seat switch driver (down) 0
Third row power folding seat switch driver released Battery voltage
7 Ground G/R Park signal InputA/T selector lever in P or N
Battery voltage
A/T selector lever not in P or N 0
8 Ground O/L Ignition signal InputIgnition switch ON or START
Battery voltage
Ignition switch OFF 0
9 Ground G/B 40% seat Hall signal Input —9V
10 Ground O/B 60% seat Hall signal Input —9V
11 Ground SB 40% seat switch signal (up) Output Push either third row power fold-
ing seat switch passenger (up) 0
Third row power folding seat switch passenger released Battery voltage
12 Ground O 60% seat switch signal (up) Output Push either third row power fold-
ing seat switch driver (up) 0
Third row power folding seat switch driver released Battery voltage
13 Ground W Battery Input— Battery voltage
14 Ground W Battery Input— Battery voltage
15 Ground Y/B Hall switch ground —— —
16 Ground B Switch ground —— —
17 Ground W/L 60% Seat motor Output— Battery voltage
18 Ground B Ground —— —
19 Ground R/W 60% Seat motor Output— Battery voltage
Revision: March 2010 2008 QX56

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< ECU DIAGNOSIS >
THIRD ROW POWER FOLDING SEAT CONTROL UNIT
20 Ground G/W 40% Seat motorOutput— Battery voltage
21 Ground B Ground —— —
22 Ground V 40% Seat motor Output— Battery voltage
Te r m i n a l N o .
Wire
color Description
ConditionVoltage (V)
(Approx.)
+ - Signal nameInput/
Output
Revision: March 2010 2008 QX56

THIRD ROW POWER FOLDING SEAT CONTROL UNITSE-23
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Wiring DiagramINFOID:0000000001735722
AAJWA0044GB
Revision: March 2010 2008 QX56

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< ECU DIAGNOSIS >
THIRD ROW POWER FOLDING SEAT CONTROL UNIT
ALJIA0065GB
Revision: March 20102008 QX56

THIRD ROW POWER FOLDING SEAT CONTROL UNITSE-25
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ALJIA0066GB
Revision: March 2010 2008 QX56

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< ECU DIAGNOSIS >
THIRD ROW POWER FOLDING SEAT CONTROL UNIT
ALJIA0067GB
Revision: March 20102008 QX56

THIRD ROW POWER FOLDING SEAT CONTROL UNITSE-27
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AAJIA0063GB
Revision: March 2010 2008 QX56

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< ECU DIAGNOSIS >
THIRD ROW POWER FOLDING SEAT CONTROL UNIT
DTC Index
INFOID:0000000001735723
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 second 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.
ALJIA0094GB
Revision: March 2010 2008 QX56

THIRD ROW POWER FOLDING SEAT CONTROL UNITSE-29
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Fail SafeINFOID:0000000001735724
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 folding 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-35, "
Third Row Power
Folding Seat Stops Short of its Fully Up or Down Posi-
tion".
3. Replace third row power folding seat motor LH. Refer to SE-60, "
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 foldin g seat motor LH motor cir-
cuits. Refer to SE-32, "
Only One Third Row Power Fold-
ing Seat Will Operate".
3. Replace third row power folding seat motor LH. Refer to SE-60, "
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-
63, "Power seat cross beam".
15 Power supply to third 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-63, "
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 foldin g seat motor RH Hall signal
and ground circuits. Refer to SE-35, "
Third Row Power
Folding Seat Stops Short of its Fully Up or Down Posi-
tion".
3. Replace third row power folding seat motor RH. Refer to SE-60, "
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 fold ing seat motor RH motor cir-
cuits. Refer to SE-32, "
Only One Third Row Power Fold-
ing Seat Will Operate".
3. Replace third row power folding seat motor RH. Refer to SE-60, "
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-
63, "Power seat cross beam".
25 Power supply to third 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-63, "
Power seat cross beam".
33 System normal or END of chime codes —
Revision: March 2010 2008 QX56