Infiniti QX4. Electrical System (2003 year). Manual — part 37
MEL666P
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
HARNESS LAYOUT
Engine Control Harness (Cont’d)
EL-581
Body Harness LH
NBEL0438
MEL373Q
HARNESS LAYOUT
Body Harness LH
EL-582
Body Harness RH
NBEL0439
MEL406R
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
HARNESS LAYOUT
Body Harness RH
EL-583
Back Door Harness
NBEL0440
MEL375Q
HARNESS LAYOUT
Back Door Harness
EL-584
Engine and Transmission Harness
NBEL0441
MEL376Q
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
HARNESS LAYOUT
Engine and Transmission Harness
EL-585
Room Lamp Harness
NBEL0442
MEL377Q
HARNESS LAYOUT
Room Lamp Harness
EL-586
Air Bag Harness
NBEL0443
MEL378Q
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
HARNESS LAYOUT
Air Bag Harness
EL-587
Front Door Harness
NBEL0444
MEL379Q
HARNESS LAYOUT
Front Door Harness
EL-588
Rear Door Harness
NBEL0445
MEL261M
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
HARNESS LAYOUT
Rear Door Harness
EL-589
NBEL0446
Headlamp
NBEL0446S01
Item
Wattage W
High/Low
60/55 (HB2)
Exterior Lamp
NBEL0446S02
Item
Wattage W
Front fog lamp
55
Front turn signal lamp
21
Parking lamp
5
Rear combination lamp
Turn signal lamp
27
Stop/Tail lamp
21/5
Back-up lamp
18
License plate lamp
5
High-mounted stop lamp
5
Interior Lamp
NBEL0446S03
Item
Wattage W
Interior lamp
10
Vanity mirror lamp
1.4
Spot lamp
8
Luggage room lamp
10
BULB SPECIFICATIONS
Headlamp
EL-590
NBEL0447
Use the chart below to find out what each wiring
diagram code stands for.
Refer to the wiring diagram code in the alphabetical
index to find the location (page number) of each
wiring diagram.
Code
Section
Wiring Diagram Name
1STSIG
AT
A/T 1ST Signal
2NDSIG
AT
A/T 2ND Signal
3RDSIG
AT
A/T 3RD Signal
4THSIG
AT
A/T 4TH Signal
A/C, A
HA
Auto Air Conditioner
AAC/V
EC
IACV-AAC Valve
ABS
BR
Anti-lock Brake System
ASCD
EL
Automatic Speed Control Device
AT/C
EC
A/T Control
AT/IND
EL
A/T Indicator Lamp
AUDIO
EL
Audio
AUT/DP
EL
Automatic Drive Positioner
BA/FTS
AT
A/T Fluid Temperature Sensor
and TCM Power Supply
BACK/L
EL
Back-up Lamp
BYPS/V
EC
Vacuum Cut Valve Bypass Valve
CHARGE
SC
Charging System
CHIME
EL
Warning Chime
CIGAR
EL
Cigarette Lighter
CLOCK
EL
Clock
COMPAS
EL
Compass and Thermometer
D/LOCK
EL
Power Door Lock
DEF
EL
Rear Window Defogger
DTRL
EL
Headlamp — With Daytime Light
System —
ECTS
EC
Engine Coolant Temperature Sen-
sor
ENGSS
AT
Engine Speed Signal
F/FOG
EL
Front Fog Lamp
F/PUMP
EC
Fuel Pump Control
F/LID
EL
Fuel Lid Opener
FLS1
EC
Fuel Level Sensor Circuit
FLS2
EC
Fuel Level Sensor Circuit
FLS3
EC
Fuel Level Sensor Circuit
FTS
AT
A/T Fluid Temperature Sensor
FTTS
EC
Fuel Tank Temperature Sensor
Code
Section
Wiring Diagram Name
FUELB2
EC
Fuel Injection System Function
(Left Bank)
FUELB1
EC
Fuel Injection System Function
(Right Bank)
H/AIM
EL
Headlamp Aiming Control System
H/LAMP
EL
Headlamp
HORN
EL
Horn
HSEAT
EL
Heated Seat
IATS
EC
Intake Air Temperature Sensor
ICC
EL
Intelligent Cruise Control System
IGN/SG
EC
Ignition Signal
ILL
EL
Illumination
INJECT
EC
Injector
INT/L
EL
Interior, Spot, Vanity Mirror, and
Luggage Room Lamps
IVCB2
EC
Intake Valve Timing Control Sole-
noid Valve (B2)
IVCB1
EC
Intake Valve Timing Control Sole-
noid Valve (B1)
IVCSB2
EC
Intake Valve Timing Control Posi-
tion Sensor (B2)
IVCSB1
EC
Intake Valve Timing Control Posi-
tion Sensor (B1)
KEYLES
EL
Remote Keyless Entry System
KS
EC
Knock Sensor
LAN
AT
A/T Communication Line
LOAD
EC
Electrical Load Signal
LPSV
AT
Line Pressure Solenoid Valve
MAFS
EC
Mass Air Flow Sensor
MAIN
AT
Main Power Supply and Ground
Circuit
MAIN
EC
Main Power Supply and Ground
Circuit
METER
EL
Speedometer, Tachometer, Temp.,
Oil, and Fuel Gauges
MIL/DL
EC
MIL and Data Link Connectors
MIRROR
EL
Door Mirror
NATS
EL
IVIS (INFINITI Vehicle Immobilizer
System)
NAVI
EL
Navigation System
NONDTC
AT
Non-detectable Items
O2H1B1
EC
Heated Oxygen Sensor 1 Heater
Bank 1
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
WIRING DIAGRAM CODES (CELL CODES)
EL-591
Code
Section
Wiring Diagram Name
O2H1B2
EC
Heated Oxygen Sensor 1 Heater
Bank 2
O2H2B1
EC
Heated Oxygen Sensor 2 Heater
Bank 1
O2H2B2
EC
Heated Oxygen Sensor 2 Heater
Bank 2
O2S1B1
EC
Heated Oxygen Sensor 1 Bank 1
O2S1B2
EC
Heated Oxygen Sensor 1 Bank 2
O2S2B1
EC
Heated Oxygen Sensor 2 Bank 1
O2S2B2
EC
Heated Oxygen Sensor 2 Bank 2
OVRCSV
AT
Overrun Clutch Solenoid Valve
P/ANT
EL
Power Antenna
PGC/V
EC
EVAP Canister Purge Volume
Control Solenoid Valve
PHASE
EC
Camshaft Position Sensor
(PHASE)
PNP/SW
EC
Park/Neutral Position Switch
PNP/SW
AT
Park/Neutral Position Switch
POS
EC
Crankshaft Position Sensor
(CKPS) (POS)
POWER
EL
Power Supply Routing
PRE/SE
EC
EVAP Control System Pressure
Sensor
PST/SW
EC
Power Steering Oil Pressure
Switch
REF
EC
Crankshaft Position Sensor
(CKPS) (REF)
REMOTE
EL
Audio (Remote Control Switch)
RP/SEN
EC
Refrigerant Pressure Sensor
S/SIG
EC
Start Signal
S/VCSW
EC
Swirl Control Valve Control
Vacuum Check Switch
SEAT
EL
Power Seat
SHIFT
AT
A/T Shift Lock System
SROOF
EL
Sunroof
SRS
RS
Supplemental Restraint System
SSV/A
AT
Shift Solenoid Valve A
SSV/B
AT
Shift Solenoid Valve B
START
SC
Starting System
STOP/L
EL
Stop lamp
SWL/V
EC
Swirl Control Valve Control Sole-
noid Valve
Code
Section
Wiring Diagram Name
TAIL/L
EL
Parking, License and Tail Lamps
TCCSIG
AT
A/T TCC Signal (Lock up)
TCV
AT
Torque Converter Clutch Solenoid
Valve
T/F
TF
Transfer
TLID
EL
Trunk Lid Opener
TP/SW
EC
Throttle Position Switch
TPS
AT
Throttle Position Sensor
TPS
EC
Throttle Position Sensor
TRNSCV
EL
Homelink Universal Transceiver
TRSA/T
AT
Turbine Revolution Sensor
TURN
EL
Turn Signal and Hazard Warning
Lamps
VEHSEC
EL
Vehicle Security System
VENT/V
EC
EVAP canister vent control valve
VIAS/V
EC
Variable Induction Air Control Sys-
tem
VSS
EC
Vehicle Speed Sensor
VSSA/T
AT
Vehicle Speed Sensor A/T (Revo-
lution Sensor)
VSSMTR
AT
Vehicle Speed Sensor MTR
WARN
EL
Warning Lamps
WINDOW
EL
Power Window
WIP/R
EL
Rear Wiper and Washer
WIPER
EL
Front Wiper and Washer
WIRING DIAGRAM CODES (CELL CODES)
EL-592
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