Description=NLEL0485The TCU has the following functions.
INTERIOR LAMP TIMERNLEL0485S01The interior lamp timer is controlled by the TCU.
For further information, refer to ªINTERIOR ROOM LAMPº (EL-116).
IGNITION KEY WARNING CHIME, LIGHT WARNING CHIME AND TRAILER DIRECTION
INDICATOR WARNING CHIME
NLEL0485S02The ignition key and light warning chime are controlled by the TCU.
For further information, refer to ªWARNING CHIMEº (EL-165).
REAR WINDOW DEFOGGER TIMERNLEL0485S03The rear window defogger and door mirror defogger system are controlled by the TCU.
For further information, refer to ªREAR WINDOW DEFOGGERº (EL-198).
POWER DOOR LOCK (SUPER LOCK)NLEL0485S04The power door lock (super lock) is controlled by the TCU.
For further information, refer to ªPOWER DOOR LOCK Ð Super Lock к (EL-281).
MULTI-REMOTE CONTROL SYSTEMNLEL0485S05The multi-remote control system is controlled by the TCU.
For further information, refer to ªMULTI-REMOTE CONTROL SYSTEMº (EL-314).
FUNCTIONNLEL0485S06+The TCU has the following control function.
Item Details of control
Direction indicatorsSwitches the director indicators (Left, Right or All) when the combination
switch or hazard switch is operated.
Light warning chimeSounds warning chime when driver's door is opened with light switch in the
1st or 2nd position and ignition switch ªOFFº.
Ignition key warning chimeSounds warning chime when driver's door is opened with key in ignition and
the driver door lock knob (unlock sensor) is moved from the ªunlockº position
to the ªlockº position.
Trailer direction indicator warning chimeSounds warning chime when operating direction indicator (turn signal) and
towing a trailer.
Rear window defogger timerTurn off rear window defogger and door mirror heater, if equipped, about 15
minutes after the rear window defogger switch is turned ªONº.
Battery saverShuts off interior lamp in 30 minutes if any door is left open when ignition
switch is ªOFFº. The battery saver will reset if ignition switch is cycled or any
door is opened or closed.
Interior lamp timerKeep interior lamp illuminated for about 30 seconds when:
+driver's door is unlocked,
+the ignition is switched off,
+driver's door is opened and then closed.
The timer is cancelled, and interior lamp turns off when:
+driver's door is locked, or
+ignition switch is turned ªONº.
Power door lock Centrally locks and unlocks the vehicle
Super lock Activates and de-activates the super lock system.
TIME CONTROL UNIT
Description
EL-326
PrecautionsNLEL0510WARNING:
Do not attempt to disassemble the monitor. Parts of the monitor have high voltages that can result in
severe and dangerous electric shock.
CAUTION:
+Do not reverse battery connections.
+Do not attach unauthorized parts.
+Protect the unit from severe impact.
NOTE:
Before beginning repair, determine whether or not the unit is defective. Refer to ªThis Condition Is Not
Abnormalº (EL-432).
Component Parts LocationNLEL0511For details, refer to ªELECTRICAL UNIT LAYOUTº (EL-442) and ªHARNESS LAYOUTº (EL-452).
SEL504X
System DescriptionNLEL0512OUTLINENLEL0512S01The Navigation System (Multi-AV System) relies upon three sens-
ing devices in order to determine vehicle location at regular time
intervals.
1. Vehicle speed sensor: Determines the distance the vehicle has
traveled.
2. Gyro (Angular velocity sensor): Determines vehicle steering
angle and directional change.
3. GPS antenna (GPS data): Determines vehicle forward move-
ment and direction.
The data provided by the three sensing functions together with a
comparison of the mapping information read from the CD-ROM
drive permit accurate determination of the vehicle's current location
and subsequent course (map matching). The information appears
on a liquid crystal display.
This comparison of GPS data (vehicle position sensing) and map
matching permits precise determination of vehicle location.
SEL684V
Position Sensor Operating PrinciplesNLEL0512S0101The sensor determines current vehicle location by calculating the
previously sensed position, the distance traveled from this position,
and the directional changes occurring during this travel.
1. Distance traveled
The distance traveled is calculated using signals received from
the vehicle speed sensor. The sensor automatically compen-
sates for the slightly reduced wheel and tire diameter resulting
from tire wear.
2. Forward movement (Direction)
Changes in the direction of forward movement are calculated
by the gyro (angular velocity sensor) and the GPS antenna
NAVIGATION SYSTEM
Precautions
EL-370
NLEL0311
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
A/C, M HA Manual Air Conditioner
A/CCUT EC Air Conditioner Control
AAC/V EC IDLE AIR CONTROL VALVE (IACV)
Ð AUXIUARY AIR CONTROL
(AAC) VALVE
AACVLV EC Idle Air Control Valve (IACV) Ð
Auxiuary Air Control (AAC) Valve
ABS BR Anti-lock Brake System
APS EC Accelerator Position Sensor
ATCONT EC A/T Control line
ATDIAG EC A/T Diagnosis Communication Line
AUDIO EL Audio
BACK/L EL Back-up Lamp
BRK/SW EC Brake Switch
CHARGE SC Charging System
CHIME EL Warning Chime
CIGAR EL Cigarette Lighter
CKPS EC Crankshaft Position Sensor
CLOCK EL Clock
CMPS EC Camshaft Position Sensor (CMPS)
COOL/F EC Cooling Fan Motor
D/LOCK EL Power Door Lock
DEF EL Rear Window Defogger
DTRL EL Headlamp Ð Daytime Light System
ECMRLY EC ECM Relay
ECTS EC Engine Coolant Temperature Sensor
(ECTS)
EGR/TS EC EGR Temperature Sensor
EGRC/V EC EGR Volume Control Valve
EGRC1 EC EGR Function (Close)
EGRSYS EC EGR Function
EGVC/V EC EGR Volume Control Valve
ENGSS AT Engine Speed Signal
F/FOG EL Front Fog Lamp
F/PUMP EC Fuel Pump
FPS AT CVT Fluid Pressure Sensor
Code Section Wiring Diagram Name
FRO2 EC Heated Oxygen Sensor 1 (Front)
FRO2/H EC Heated Oxygen Sensor 1 Heater
(Front)
FTS AT CVT Fluid Temperature Sensor
FUEL EC Fuel Injection System Function
GLOW EC Glow Control System
H/AIM EL Headlamp Ð Headlamp Aiming
Control Ð
H/LAMP EL Headlamp
H/SEAT EL Heated Seat
HEATER HA Heater System
HLC EL Headlamp Washer
HORN EL Horn
IATS EC Intake Air Temperature Sensor
IATSEN EC Intake Air Temperature Sensor
IGN/SG EC Ignition Signal
IGNSYS EC Ignition Signal
ILL EL Illumination
INJECT EC Injector
INJPMP EC Injection Pump (Fuel Temperature
Sensor)
INT/L EL Spot and Laggage Room Lamps
IVC EC Intake Valve Timing Control Sole-
noid Valve
IVC/V EC Intake Valve Timing Control Sole-
noid Valve
KS EC Knock Sensor (KS)
LOAD EC Electrical Load Signal
LPS AT Line Pressure Sensor
LPSV AT Line Pressure Solenoid Valve
MAFS EC Mass Air Flow Sensor (MAFS)
MAIN AT Main Power Supply and Ground Cir-
cuit
MAIN EC Main Power Supply and Ground Cir-
cuit
METER EL Meter and Gauges
MIL/DL EC MIL and Data Link Connectors
MIRROR EL Door Mirror
MULTI EL Multi-remote Control System
NATS EL NATS (Nissan Anti-Theft System)
NAVI EL Navigation System
WIRING DIAGRAM CODES (CELL CODES)
EL-525
Code Section Wiring Diagram Name
NONDTC AT Non-detectable Items
O2H1B1 EC Heated Oxygen Sensor 1 Heater
(Front)
O2H2B1 EC Heated Oxygen Sensor 2 Heater
(Rear)
O2S1B1 EC Heated Oxygen Sensor 1 (Front)
O2S2B1 EC Heated Oxygen Sensor Heater 2
(Rear)
PGC/V EC EVAP Canister Purge Volume Con-
trol Solenoid Valve
PHASE EC Camshaft Position Sensor (PHASE)
PNP/SW EC Park/Neutral Position (PNP) Switch
PNP/SW AT Park/Neutral Position (PNP) Switch
PNPSW1 EC Park/Neutral Position (PNP) Switch
POS EC Crankshaft Position Sensor (POS)
POWER EL Power Supply Routing
PRGVLV EC EVAP Canister Purge Volume Con-
trol Solenoid Valve
PSSAT AT Primary Speed Sensor
PST/SW EC Power Steering Oil Pressure Switch
R/FOG EL Rear Fog Lamp
ROOM/L EL Interior Room Lamp
RP/SEN EC Referigerant Pressure Sensor
RRO2 EC Heated Oxygen Sensor 2 (Rear)
RRO2/H EC Heated Oxygen Sensor 2 Heater
(Rear)
S/SIG EC Start Signal
SHIFT AT Shift Lock System
S/LOCK EL Power Door Lock Ð Super Lock Ð
SROOF EL Power Sunroof
SRS RS Supplemental Restraint System
(SRS)
START SC Starting System
STM AT Step Motor
STOP/L EL Stop Lamp
S/VCSW EC Swirl Control Valve Control Vacuum
check Switch
SWL/C EC Swirl Control Valve Control System
SWL/V EC Swirl Control Valve Control Solenoid
Valve
TAIL/L EL Parking, License and Tail LampsCode Section Wiring Diagram Name
TCV AT Torque Converter Clutch Solenoid
Valve
TP/SW EC Closed Throttle Position Switch
TPS AT Throttle Position Sensor
TPS EC Throttle Position Sensor
TURN EL Turn Signal and Hazard Warning
Lamps
VSS EC Vehicle Speed Sensor (VSS)
VSSAT AT Secondary Speed Sensor
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-526
WARNING:
+Position vehicle on a flat and solid surface.
+Place chocks at front and back of rear wheels.
+Do not remove engine until exhaust system has com-
pletely cooled off, otherwise, you may burn yourself
and/or fire may break out in fuel line.
+Before disconnecting fuel hose, release pressure.
Refer to EC-43, ªFuel Pressure Releaseº.
+Be sure to lift engine and transaxle in a safe manner.
+For engines not equipped with engine slingers, attach
proper slingers and bolts described in PARTS CATALOG.
CAUTION:
+When lifting engine, be sure to clear surrounding parts.
Use special care near accelerator wire casing, brake lines
and brake master cylinder.
+When lifting the engine, always use engine slingers in a
safe manner.
+When removing drive shaft, be careful not to damage
grease seal of transaxle.
+Before separating engine and transaxle, remove crank-
shaft position sensor (POS) from the cylinder block
assembly.
+Always be extra careful not to damage edge of crankshaft
position sensor (POS), or signal plate teeth.
Engine cannot be removed separately from transaxle. Remove
engine with transaxle as an assembly.
REMOVALNLEM0022S011. Drain coolant from radiator and cylinder block. Refer to LC-18,
ªChanging Engine Coolantº.
2. Remove coolant reservoir tank and bracket.
3. Drain engine oil.
4. Remove battery and battery tray.
5. Remove air cleaner and air duct.
6. Remove drive belts.
7. Remove alternator and air conditioner compressor from
engine.
8. Remove power steering oil pump from engine and position
aside.
Power steering oil pump does not need to be disconnected
from power steering tubes.
ENGINE ASSEMBLYQG
Removal and Installation (Cont'd)
EM-50
Removal and InstallationNLEM0137
NEM354
1. Stopper
2. Bracket
3. Front insulator assembly4. Center member
5. Pad
6. Right insulator assembly7. Bracket
8. Rear insulator assembly
9. Left insulator assembly
WARNING:
+Position vehicle on a flat and solid surface.
+Place chocks at front and back of rear wheels.
+Do not remove engine until exhaust system has com-
pletely cooled off, otherwise you may burn yourself and/or
fire may break out in fuel line.
+Before disconnecting fuel hose, release pressure. Refer to
EC-578, ªFuel Pressure Releaseº.
+Before removing front axle from transaxle, place safety
stands under designated front supporting points. Refer to
GI-43, ªGarage Jack and Safety Standº.
+Be sure to lift engine and transaxle in a safe manner.
+For engines not equipped with engine slingers, attach
proper slingers and bolts described in PARTS CATALOG.
CAUTION:
+When lifting engine, be sure to clear surrounding parts.
Use special care near accelerator wire casing, brake lines
and brake master cylinder.
+In lifting the engine, always use engine slingers in a safe
manner.
+In removing drive shaft, be careful not to damage grease
seal of transaxle.
+Before separating engine and transaxle, remove the
ENGINE ASSEMBLYSR
Removal and Installation
EM-130
JEM158G
SEM301G
3. Heat cylinder head to 110 to 120ÉC (230 to 248ÉF) by soaking
in heated oil.
4. Sufficiently cool valve seat with dry ice. Force fit valve seat into
cylinder head.
WARNING:
Do not touch cold valve seat with your bare hands.
5. Cut or grind valve seat using suitable tool to the specified
dimensions as shown in SDS (EM-245).
CAUTION:
Use the valve seat cutter properly. Securely gripping the cut-
ter handle with both hands, press the cutter down onto the
entire circumference of the contacting surface and finish cut-
ting at one time. Improper pressing of the cutter or cutting in
several steps may result in staged surface on the valve seat.
6. After cutting, lap valve seat with abrasive compound.
7. Check valve seating condition. Refer to EM-207, ªValve Seatsº.
JEM253G
8. Use a depth gauge to measure the distance between the
mounting surface of the cylinder head spring seat and the
valve stem end. If the distance is shorter than specified, repeat
step 5 above to adjust it. If it is longer, replace the valve seat
with a new one.
Valve seat resurface limit ªLº:
Intake 36.53 - 36.98 mm (1.4382 - 1.4559 in)
Exhaust 36.53 - 37.01 mm (1.4382 - 1.4571 in)
CYLINDER HEADYD
Inspection (Cont'd)
EM-208
Removal and InstallationNLEM0069
SEM554G
WARNING:
+Situate vehicle on a flat and solid surface.
+Place chocks at front and back of rear wheels.
+Do not remove engine until exhaust system has com-
pletely cooled off. Otherwise, you may burn yourself
and/or fire may break out in fuel line.
+For safety during subsequent steps, the tension of wires
should be slackened against the engine.
+Before removing front axle from transaxle, place safety
stands under designated front supporting points. Refer to
GI-43, ªGarage Jack and Safety Standº.
+Be sure to hoist engine and transaxle in a safe manner.
+For engines not equipped with engine slingers, attach
proper slingers and bolts described in PARTS CATALOG.
CAUTION:
+When lifting engine, be careful not to strike adjacent parts,
especially the following: Accelerator wire casing, brake
lines, and brake master cylinder.
+In hoisting the engine, always use engine slingers in a
safe manner.
+In removing drive shaft, be careful not to damage grease
seal of transaxle.
+Before separating engine and transaxle, remove the
ENGINE ASSEMBLYYD
Removal and Installation
EM-218