2009 INFINITI QX56 ECU

TM-286
< DISASSEMBLY AND ASSEMBLY >
ASSEMBLY
e. Install A/T fluid temperature sensor 2 to bracket.
f. Install A/T fluid temperature sensor 2 (with bracket) to controlvalve with TCM and tighten bolt to specified torque.
CAUTION:
Adjust bolt hole of bracket to bolt hole of control valve.
g. Install control valve with TCM in transmission case. 1. : Brake band
CAUTION:
 Make sure that input speed sensor is securely installed
into input speed sensor hole (A).
 Hang down output speed sen sor harness toward outside
so as not to disturb installati on of control valve with TCM.
 Adjust A/T assembly harness co nnector of control valve
with TCM to terminal hole of transmission case.
 Assemble it so that manual valve cutout is engaged with manual plate projection.
SCIA5264E
Bracket bolt : 7.9 N·m (0.81 kg-m, 70 in-lb)
SCIA5253E
JSDIA1318ZZ
SCIA5035E
Revision: December 20092009 QX56

ASSEMBLYTM-287
< DISASSEMBLY AND ASSEMBLY >
CEF
G H
I
J
K L
M A
B
TM
N
O P
h. Install bolts (A), (B) and (C) to control valve with TCM.  : Front
i. Tighten bolt (A), (B) and (C) temporarily to prevent dislocation. After that tighten them in order (A → B → C), and then tighten
other bolts.
 : Front
10. Connect A/T fluid temperature sensor 2 connector (A).
11. Securely fasten terminal cord assembly and A/T fluid tempera- ture sensor 2 harness with terminal clips.
12. Connect output speed sensor connector (1).
13. Securely fasten output speed sensor harness with terminal clip.
14. Pull down A/T assembly harness connector. CAUTION:
Do not damage connector.
Bolt symbol Length mm (in) Number of bolts
A 42 (1.65) 5
B 55 (2.17) 6
C 40 (1.57) 1
SCIA8077E
Bolt symbol A B C
Number of bolts 5 6 1
Length mm (in) 42 (1.65) 55 (2.17) 40 (1.57)
Tightening torque
N·m (km-g, in-lb) 7.9 (0.81, 70)With ATF applied
7.9 (0.81, 70)
SCIA8078E
SCIA8124E
JSDIA1319ZZ
SCIA5299E
Revision: December 20092009 QX56

WCS-2
WARNING CHIME SYSTEM .............................23
Wiring Diagram .................................................... ...23
ECU DIAGNOSIS ..................................... ...28
COMBINATION METER ................................. ...28
Reference Value .................................................. ...28
Wiring Diagram .......................................................30
Fail Safe .................................................................46
DTC Index ..............................................................47
BCM (BODY CONTROL MODULE) ..................49
Reference Value .................................................. ...49
Terminal Layout ......................................................51
Physical Values ......................................................51
Wiring Diagram .......................................................57
SYMPTOM DIAGNOSIS .............................62
THE LIGHT REMINDER WARNING DOES
NOT SOUND ................................................... ...
62
Description ........................................................... ...62
Diagnosis Procedure ...............................................62
THE SEAT BELT WARNING CONTINUES
SOUNDING, OR DOES NOT SOUND ...............
63
Description ........................................................... ...63
Diagnosis Procedure ...............................................63
THE KEY WARNING DOES NOT SOUND .......64
Description ........................................................... ...64
Diagnosis Procedure ...............................................64
PRECAUTION ............................................65
PRECAUTIONS .............................................. ...65
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. ...
65
Revision: December 20092009 QX56

WCS-28
< ECU DIAGNOSIS >
COMBINATION METER
ECU DIAGNOSIS
COMBINATION METER
Reference ValueINFOID:0000000004115460
TERMINAL LAYOUT
PHYSICAL VALUES
WKIA5724E
Te r m i -nal Wire
color Item Condition
Reference value (V)
(Approx.)
Ignition
switch Operation or condition
3 Y/L Fuel level sensor signal — —Refer to MWI-12, "
FUEL GAUGE : System
Description".
4 B/P Fuel level sensor ground ON —0
6 BR/W Generator ONGenerator voltage low
0
Generator voltage normal Battery voltage
10 L CAN-H —— —
11 P C A N - L —— —
13 P Air bag warning lamp in-
put ONAir bag warning lamp ON
4
Air bag warning lamp OFF 0
15 BR CK SUSP warning lamp
input —CK SUSP warning lamp
ON
0
CK SUSP warning lamp
OFF Battery voltage
20 B Ground —— 0
21 O/L Ignition switch ON or
START ON
— Battery voltage
23 W/L Washer fluid level switch ON Washer fluid level low
0
Washer fluid level normal Battery voltage
24 O/B Seat belt buckle switch
LH ONUnfastened (ON)
0
Fastened (OFF) Battery voltage
25 P/L Seat belt buckle switch
RH ONUnfastened (ON)
0
Fastened (OFF) Battery voltage
31 G Parking brake switch ON Parking brake applied
0
Parking brake released Battery voltage
32 P/B Brake fluid level switch ON Brake fluid level low
0
Brake fluid level normal Battery voltage
33 R/G Stop lamp switch —Brake pedal depressed
Battery voltage
Brake pedal released 0
Revision: December 20092009 QX56

WCS
COMBINATION METERWCS-29
< ECU DIAGNOSIS >
C
DE
F
G H
I
J
K L
M B A
O P
35 G/O Security indicator input OFF Security indicator ON 0
Security indicator OFF
Battery voltage
37 O Ignition switch ACC or
ON
—
— Battery voltage
40 Y/R Battery power supply — —Battery voltage
46 BR Illumination output ——Refer to INL-9, "
System Description".
47 B Ground —— 0
50 W/R Vehicle speed signal out-
put (8-pulse) ONSpeedometer operated
[When vehicle speed is ap-
prox. 40 km/h (25 MPH)] NOTE:
Maximum voltage may be 12V due to spec-
ifications (connected units).
52 B Ground —— 0
Te r m i -
nal Wire
color Item Condition
Reference value (V)
(Approx.)
Ignition
switch Operation or condition
PKIC0643E
Revision: December 20092009 QX56

WCS-30
< ECU DIAGNOSIS >
COMBINATION METER
Wiring Diagram
INFOID:0000000004115461
AANWA0124GB
Revision: December 20092009 QX56

WCS
COMBINATION METERWCS-31
< ECU DIAGNOSIS >
C
DE
F
G H
I
J
K L
M B A
O P
ALNWA0129GB
Revision: December 20092009 QX56

WCS-32
< ECU DIAGNOSIS >
COMBINATION METER
ALNWA0130GB
Revision: December 20092009 QX56