Nissan Terrano model r20 series 2004. Instruction — part 153
Air Conditioning Cut Control
INPUT/OUTPUT SIGNAL LINE
Air conditioner switch
E
Air Conditioner “ON” signal
ECM
E
Air Condi-
tioner relay
Accelerator position sensor
E
Accelerator valve opening angle
Vehicle speed sensor
E
Vehicle speed
Engine coolant temperature sensor
E
Engine coolant temperature
SYSTEM DESCRIPTION
This system improves acceleration when the air conditioner is used.
When the accelerator pedal is fully depressed, the air conditioner is turned off for a few seconds. When engine
coolant temperature becomes excessively high, the air conditioner is turned off. This continues until the cool-
ant temperature returns to normal.
Fuel Cut Control (at high engine speed)
INPUT/OUTPUT SIGNAL LINE
Crankshaft position sensor (TDC)
E
Engine speed
ECM
E
Electric
governor
If the engine speed is above 5,500 rpm fuel will be cut off to keep
engine within its working range.
NOTE:
This function is different from deceleration control and fuel cut
solenoid valve control.
Glow Control
INPUT/OUTPUT SIGNAL LINE
Engine coolant temperature sensor
E
Engine coolant temperature
ECM
E
Glow relay
E
Glow plug
Ignition switch
E
Start signal
E
Glow lamp
Glow plug is heated in three-stage that is pre-glow, intermediate-
glow and after-glow. Glow time changes depending on engine cool-
ant temperature.
ENGINE AND EMISSION BASIC CONTROL
SYSTEM DESCRIPTION
TD27Ti
EC-334
Description
I
In this system blow-by gas is sucked into the air inlet pipe
through the control valve after oil separation by oil separator.
Blow-by Control Valve
I
Check control valve for clogging and abnormalities.
Ventilation Hose
1. Check hoses and hose connections for leaks.
2. Disconnect all hoses and clean with compressed air. If any
hose cannot be freed of obstructions, replace.
NEF760
MEC971D
NEF762
SEC692
CRANKCASE VENTILATION SYSTEM
TD27Ti
EC-335
CAUTION:
I
Do not disassemble No. 1 nozzle (with needle lift sensor).
Entrust disassembly or adjustment to BOSCH service
shop.
Plug flare nut with a cap or rag so that no dust enters the
nozzle. Cover nozzle tip for protection of needle.
Removal and Installation
1. Remove fuel injection tube and spill tube.
2. Remove injection nozzle assembly.
Also remove washers from nozzle end.
3. Install injection nozzle in the reverse order of removal.
Injection nozzle to engine:
: 54 - 64 N
⋅
m (5.5 - 6.5 kg-m, 40 - 47 ft-lb)
Injection nozzle to tube:
: 20 - 25 N
⋅
m (2.0 - 2.5 kg-m, 14 - 18 ft-lb)
a. Always clean the nozzle holes.
b. Always use new injection nozzle gasket.
c. Note that small washer should be installed in specified
direction.
d. Bleed air from fuel system.
Disassembly (No. 2 - 4 nozzle)
1. Loosen nozzle nut while preventing nozzle top from turning.
2. Arrange all disassembled parts in the order shown at left.
SEM621B
NEM244
NEF459
SEF785
MEC996D
INJECTION NOZZLE
TD27Ti
EC-336
Inspection (No. 2 - 4 nozzle)
Thoroughly clean all disassembled parts with fresh kerosene or
solvent.
I
If nozzle needle is damaged or fused, replace nozzle assem-
bly with a new one.
I
If end of nozzle needle is seized or excessively discolored,
replace nozzle assembly.
I
Check nozzle body and distance piece for proper contact. If
excessively worn or damaged, replace nozzle assembly or dis-
tance piece.
I
Check nozzle spring for excessive wear or damage. If exces-
sively worn or damaged, replace it with a new spring.
I
Check distance piece and nozzle holder for proper contact. If
excessively worn or damaged, replace nozzle holder assembly.
Cleaning (No. 2 - 4 nozzle)
a. Do not touch the nozzle mating surface with your fingers.
b. To wash the nozzles, use a wooden stick and brass brush
with clean diesel fuel.
1. Remove any carbon from exterior of nozzle body (except wrap-
ping angle portion) by using Tool.
2. Clean oil sump of nozzle body using Tool.
3. Clean nozzle seat by using Tool.
Take extra precautions when performing this job, since nozzle
efficiency depends greatly on a good nozzle seat.
SEF830
YEC231A
SEF832
INJECTION NOZZLE
TD27Ti
EC-337
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