ECU INFINITI QX56 2009 Factory Service Manual

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

WCS
COMBINATION METERWCS-33
< ECU DIAGNOSIS >
C
DE
F
G H
I
J
K L
M B A
O P
ALNWA0131GB
Revision: December 20092009 QX56

WCS-34
< ECU DIAGNOSIS >
COMBINATION METER
ALNWA0132GB
Revision: December 20092009 QX56

WCS
COMBINATION METERWCS-35
< ECU DIAGNOSIS >
C
DE
F
G H
I
J
K L
M B A
O P
ALNIA0676GB
Revision: December 20092009 QX56

WCS-36
< ECU DIAGNOSIS >
COMBINATION METER
ALNIA0677GB
Revision: December 20092009 QX56