Fuel Injection Control System
DESCRIPTION
System description
Three types of fuel injection control are provided to accommodate engine operating conditions; normal control,
idle control and start control. The ECM determines the appropriate fuel injection control. Under each control,
the amount of fuel injected is compensated to improve engine performance.
Pulse signals are exchanged between ECM and electronic control fuel injection pump (control unit is built-in).
The fuel injection pump control unit performs duty control on the spill valve (built into the fuel injection pump)
according to the input signals to compensate the amount of fuel injected to the preset value.
Start control
Input/output signal chart
Sensor Input Signal to ECM ECM Function Actuator
Engine coolant temperature sensor Engine coolant temperature
Fuel injection con-
trol (start control)Electronic control fuel injec-
tion pump Crankshaft position sensor (TDC) Engine speed
Ignition switch Start signal
When the ECM receives a start signal from the ignition switch, the
ECM adapts the fuel injection system for the start control. The
amount of fuel injected at engine starting is a preset program value
in the ECM. The program is determined by the engine speed and
engine coolant temperature.
For better startability under cool engine conditions, the lower the
coolant temperature becomes, the greater the amount of fuel
injected. The ECM ends the start control when the engine speed
reaches the specific value, and shifts the control to the normal or
idle control.
Idle control
Input/output signal chart
Sensor Input Signal to ECM ECM Function Actuator
Engine coolant temperature sensor Engine coolant temperature
Fuel injection con-
trol (Idle control)Electronic control fuel injec-
tion pump Crankshaft position sensor (TDC) Engine speed
Park/Neutral position (PNP) switch Gear position
Battery Battery voltage
Accelerator position switch Idle position
Vehicle speed sensor Vehicle speed
Air conditioner switch Air conditioner signal
Heat up switch Heat up switch signal
When the ECM determines that the engine speed is at idle, the fuel injection system is adapted for the idle
control. The ECM regulates the amount of fuel injected corresponding to changes in load applied to the engine
to keep engine speed constant. The ECM also provides the system with a fast idle control in response to the
engine coolant temperature and heat up switch signal.
SEF648S
ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTIONZD30DDTi
EC-20
Fuel Injection System
SYSTEM DESCRIPTION
Three types of fuel injection control are provided to accommodate engine operating conditions; normal control,
idle control and start control. The ECM determines the appropriate fuel injection control. Under each control,
the amount of fuel injected is compensated to improve engine performance. The ECM performs duty cycle
control on the electric governor (built into the fuel injection pump) according to sensor signals to compensate
the amount of fuel injected to the preset value.
START CONTROL
Input/output signal line
Engine coolant temperature sensorEEngine coolant temperature
ECM
EElectric
governorCrankshaft position sensor (TDC)EEngine speed
Control sleeve position sensor
EControl sleeve position
When the ECM receives a start signal from the ignition switch, the
ECM adapts the fuel injection system for the start control. The
amount of fuel injected at engine starting is a preset program value
in the ECM. The program is determined by the engine speed and
engine coolant temperature.
For better startability under cool engine conditions, the lower the
coolant temperature becomes, the greater the amount of fuel
injected. The ECM ends the start control when the engine speed
reaches a value between 800 rpm and 1,200 rpm, which is deter-
mined by the engine coolant temperature and shifts the control to
the normal or idle control.
SEF648S
ENGINE AND EMISSION BASIC CONTROL
SYSTEM DESCRIPTIONTD27Ti
EC-306
Bulb Replacement
The headlamp is a semi-sealed beam type which uses a replacable
halogen bulb. The bulb can be replaced from the engine compart-
ment side without removing the headlamp body.
IGrasp only the plastic base when handling the bulb. Never
touch the glass envelope.
1. Disconnect the battery cable.
2. Disconnect the harness connector from the back side of the
bulb.
3. Pull off the rubber cap.
4. Press end of the retaining pin together to release bulb.
5. Remove the headlamp bulb. Do not shake or rotate the bulb
when removing it.
6. Install the new bulb in reverse order of removal.
CAUTION:
IDo not leave the bulb out of the headlamp reflector for a
long period of time as dust, moisture, smoke, etc. may
enter the headlamp body and affect the performance of the
headlamp. Thus, the headlamp bulb should not be
removed from the headlamp reflector until just before a
replacement bulb is to be installed.
Aiming Adjustment
When performing headlamp aiming adjustment, use an aiming
machine, aiming wall screen or headlamp tester. For operating
instructions, of any aimer, it should be in good repair, calibrated and
used according to respective operation manuals supplied with the
unit.
If any aimer is not available, aiming adjustment can be done as
follows:
For details, refer to the regulations in your own country.
CAUTION:
a. Keep all tires inflated to correct pressures.
b. Place vehicle and tester on one and same flat surface.
c. See that there is noload in vehicle other than coolant,
engine oil filled up to correct level, full fuel tank and the
driver (or equivalent weight placed in driver's position).
CAUTION:
Be sure aiming switch is set to ª0º when performing aiming
adjustment on vehicles equipped with headlamp aiming con-
trol.
NEL623
HEADLAMP
EL-43
2. Install pistons with connecting rods.
(1) Install them into corresponding cylinder using Tool.
IBe careful not to scratch cylinder wall with connecting rod.
IApply engine oil to cylinder wall, piston and bearing.
IThe leaf type combustion chamber on piston head must be
facing toward the fuel pump side.
(2) Install connecting rod bearing caps.
3. Measure connecting rod side clearance.
Connecting rod side clearance:
Standard
0.10 - 0.22 mm (0.0039 - 0.0087 in)
Limit
0.22 mm (0.0087 in)
If beyond the limit, replace connecting rod and/or crankshaft.
4. Install oil strainer and oil pan.
5. Install all removed parts.
GEAR TRAIN
1. Set No. 1 piston at its Top Dead Center.
2. Align each gear mark and install gears.
EEM108
SEM678B
SEM488
NEM177
ENGINE OVERHAULTD27Ti
Assembly (Cont'd)
EM-140
Inspection and Adjustment
WHEEL ALIGNMENT (Unladen *1)
Applied model HardtopHardtop
vanWagon
Camber degree 0É30¢ 30¢
Caster degree 0É29¢ 30¢0É30¢ 30¢0É30¢ 30¢
Kingpin inclination degree 12É37¢
Total toe-in
Radial tire mm (in)3to5
(0.12 to
0.20)3.5 to 5.5
(0.14 to
0.22)3to5
(0.12 to
0.20)
Front wheel turning angle
Full turn
inside 34É27¢
outside 33É38¢
Vehicle posture
Lower arm pivot
height (H) mm (in)32
(1.26)32
(1.26)31
(1.22)
NFA021
*1: Fuel, radiator coolant and engine oil full. Spare tire, jack, hand tools
and mats in designated positions.
WHEEL BEARING
Axial end play limit mm (in) 0 (0)
Lock nut
Tightening torque
N×m (kg-m, ft-lb)78-98(8-10,58-72)
Retightening torque
N×m (kg-m, ft-lb)0.5 - 1.5
(0.05 - 0.15, 0.4 -1.1)
Turning resistance at wheel
hub boltA
Tightening angle degree 15É - 30É
Turning resistance at wheel
hub boltB
PreloadC=BþA N(kg, lb)7.06 - 20.99
(0.72 - 2.14, 1.59 - 4.72)
DRIVE SHAFT INSTALLATION
Axial end play mm (in)
At wheel hub 0.1 - 0.3 (0.004 -0.012)
Available drive shaft end snap rings
Thickness mm (in) Part number
1.1 (0.043) 39253-31G10 39253-88G10
1.3 (0.051) 39253-31G11 39253-88G11
1.5 (0.059) 39253-31G12 39253-88G12
1.7 (0.067) 39253-31G13 39253-88G13
1.9 (0.075) 39253-31G14 39253-88G14
2.1 (0.083) 39253-31G15 39253-88G15
2.3 (0.091) 39253-31G16 39253-88G16
UPPER BALL JOINT
Swinging force at cotter pin hole
N (kg, lb)31.87 - 199.38
(3.25 - 20.33, 7.17 - 44.83)
Rotating torque
N×m (kg-cm, in-lb)1.0 - 4.9 (10 - 50, 8.7 - 43.4)
Axial endplay limit mm (in) 1.6 (0.063)
LOWER BALL JOINT
Swinging force at cotter pin hole
N (kg, lb)0 - 67.7 (0 - 6.9, 0 - 15.2)
Rotating torque
N×m (kg-cm, in-lb)0 - 4.9 (0 - 50, 0 - 43)
Axial end play limit mm (in) 0.5 (0.020)
WHEEL RUNOUT
Wheel typeSteel
(15²)
Radial runout limit
mm (in)0.5 (0.02)
Lateral runout limit
mm (in)0.8 (0.031)
SERVICE DATA AND SPECIFICATIONS (SDS)
FA-39
Precautions for Fuel
DIESEL ENGINE*:
Diesel fuel of at least 50 cetane for ZD30DDTi engine.
* If two types of diesel fuel are available, use summer or winter
fuel properly according to the following temperature conditions.
IAbove þ7ÉC (20ÉF) ... Summer type diesel fuel.
IBelow þ7ÉC (20ÉF) ... Winter type diesel fuel.
CAUTION:
IDo not use home heating oil, gasoline, or other alternate
fuels in your diesel engine. The use of those can cause
engine damage.
IDo not use summer fuel at temperature below þ7ÉC (20ÉF).
The cold temperature will cause wax to form in the fuel. As
a result, it may prevent the engine from running smoothly.
IDo not add gasoline or other alternate fuels to diesel fuel.
Precautions for Engine Oils
Prolonged and repeated contact with mineral oil will result in the
removal of natural fats from the skin, leading to dryness, irritation
and dermatitis. In addition, used engine oil contains potentially
harmful contaminants which may cause skin cancer. Adequate
means of skin protection and washing facilities must be provided.
HEALTH PROTECTION PRECAUTIONS
1. Avoid prolonged and repeated contact with oils, particularly
used engine oils.
2. Wear protective clothing, including impervious gloves where
practicable.
3. Do not put oily rags in pockets.
4. Avoid contaminating clothes, particularly underwear, with oil.
5. Heavily soiled clothing and oil-impregnated footwear should not
be worn. Overalls must be cleaned regularly.
6. First Aid treatment should be obtained immediately for open
cuts and wounds.
7. Use barrier creams, applying them before each work period, to
help the removal of oil from the skin.
8. Wash with soap and water to ensure all oil is removed (skin
cleansers and nail brushes will help). Preparations containing
lanolin replace the natural skin oils which have been removed.
9. Do not use petrol, kerosine, diesel fuel, gas oil, thinners or sol-
vents for cleaning skin.
10. If skin disorders develop, obtain medical advice without delay.
11. Where practicable, degrease components prior to handling.
12. Where there is a risk of eye contact, eye protection should be
worn, for example, chemical goggles or face shields; in addition
an eye wash facility should be provided.
(For the United Kingdom, see also HSE Cautionary Notice SHW
397 ªEffects of Mineral Oil on the Skinº.)
ENVIRONMENTAL PROTECTION PRECAUTIONS
Burning used engine oil in small space heaters or boilers can be
recommended only for units of approved design. The heating sys-
tem must meet the requirements of HM Inspectorate of Pollution for
small burners of less than 0.4 MW. If in doubt check with the
appropriate local authority and/or manufacturer of the approved
appliance.
PRECAUTIONS
GI-6
Clutch pedal .............................................CL-3, 4, 5
Clutch release mechanism ...............................CL-9
Coil spring (rear) ......................................RA-14, 16
Collision diagnosis..........................................RS-57
Combination lamp, front, removal and
installation .....................................................BT-6
Combination lamp, rear, removal and
installation .....................................................BT-8
Combination meter (needle type) ...................EL-70
Combination meter removal and instal-
lation - See Instrument panel......................BT-16
Combination switch...................................EL-23, 24
Component Location (manual A/C) ..................HA-7
Compression pressure ...................................EM-10
Compressor clutch removal and
installation ...................................................HA-24
Compressor mounting ....................................HA-21
Connecting rod...............................................EM-73
Connecting rod bearing clearance.................EM-77
Connecting rod bushing clearance ................EM-73
Console box - See Instrument panel ..............BT-16
CONSULT for ABS .........................................BR-58
CONSULT for engine .............................EC-39, 327
CONSULT-II general information.....................GI-26
Control lever (M/T) .........................................MT-13
Control lever (Transfer) .....................................TF-8
Control sleeve position sensor .....................EC-414
Control valve (A/T) ........................................AT-113
COOL/F - Wiring diagram ............................EC-112
Coolant mixture ratio ...................MA-17, 20, 22, 31
Coolant replacement ...............MA-5, 17, 20, 22, 31
Cooling circuit (engine)...............................LC-9, 27
Cooling fan ...............................................LC-15, 33
Cooling fan control .......................................EC-109
Cooling fan relay ..........................................EC-426
Corrosion protection..........................................BT-5
Counter gear (M/T) .........................................MT-11
Counter gear (Transfer) ............................TF-10, 20
Cowl top ..........................................................BT-21
Cowl top cover ................................................BT-21
Crankcase emission control system -
See positive crankcase ventilation .....EC-23, 312
Crankcase ventilation system - See
Positive crankcase ventilation ............EC-23, 312
Crankshaft ......................................................EM-76
Crankshaft position sensor (TDC) .......EC-145, 385
Cylinder block ................................................EM-66
Cylinder head .................................................EM-52
D
Data link connector ................................EC-39, 327
Daytime light system ..........................EL-29, 30, 31
DEF - Wiring diagram ...................................EL-107
Defroster door control rod adjustment ...........HA-62
Diagnosis sensor unit .....................................RS-11
Diagnostic trouble code (DTC) for OBD
system ................................................EC-33, 321
Differential carrier assembly ....................PD-29, 53Differential carrier disassembly..........PD-18, 38, 40
Differential gear oil replacement .......MA-36, 38, 39
Dimensions ......................................................GI-31
D/LOCK - Wiring diagram .............................EL-140
Door glass .......................................................BT-10
Door lock .........................................................BT-10
Door mirror ......................................................BT-48
Door trim .........................................................BT-19
Door, front .......................................................BT-10
Door, rear ........................................................BT-12
Drive belt inspection ................................MA-20, 28
Drive chain (Transfer) .....................................TF-10
Drive pinion diff. inspection ......................PD-20, 42
Drive pinion height ...................................PD-21, 49
Drive plate runout ..........................................EM-94
Drive shaft ........................................................MA-5
Drive shaft (front)..................................FA-4, 12, 22
Driver air bag..................................................RS-14
Dropping resistor (A/T)....................................AT-86
Dual pressure switch..................................HA-9, 61
E
ECM input/output signal .........................EC-69, 346
ECM relay ......................................EC-80, 209, 353
ECMRLY - Wiring diagram ...........................EC-210
ECTS - Wiring diagram ..................................EC-96
EGR control (EGRC) - solenoid valve .........EC-431
EGR control valve ........................................EC-439
EGR volume control valve ...........................EC-222
EGVC/V - Wiring diagram ............................EC-225
Electrical unit ................................................Foldout
Electronic fuel injection pump ......................EC-318
Engine compartment .......................................BT-50
Engine control circuit diagram ...............EC-16, 302
Engine control component parts
location ...............................................EC-12, 300
Engine control module (ECM) ......EC-69, 121, 200,
202, 213, 346,
407, 444
Engine control system diagram and
chart....................................................EC-17, 303
Engine coolant temperature sensor
(ECTS)................................................EC-95, 361
Engine oil filter replacement..........MA-5, 20, 21, 30
Engine oil precautions .......................................GI-6
Engine oil replacement ......................MA-20, 21, 29
Engine removal ..............................................EM-63
Engine room - See Engine
compartment ...............................................BT-50
Engine serial number ......................................GI-30
Exhaust manifold ...........................................EM-18
Exhaust system ..........................................FE-4, 10
Exhaust system inspection ............................MA-36
Extension tube diff. ..................................PD-19, 28
Exterior ............................................................BT-21
Exterior lamp.............................................EL-45, 60
ALPHABETICAL INDEX
IDX-3
MAINTENANCE
SECTION
MA
CONTENTS
PRE-DELIVERY INSPECTION ITEMS............................3
GENERAL MAINTENANCE............................................4
PERIODIC MAINTENANCE............................................5
Maintenance Schedule for Diesel Engine Models
(annual mileage < 30,000 km/year) ............................5
Maintenance Schedule for Diesel Engine Models
(annual mileage > 30,000 km/year) ............................8
Maintenance Under Severe Driving Conditions
(annual mileage < 30,000 km/year) .......................... 11
Maintenance Under Severe Driving Conditions
(annual mileage > 30,000 km/year) ..........................14
RECOMMENDED FLUIDS AND LUBRICANTS...........17
Fluids and Lubricants ................................................17
SAE Viscosity Number ..............................................18
Engine Coolant Mixture Ratio....................................19
TD
ENGINE MAINTENANCE..............................................20
Retightening Manifold Bolts and Nuts .......................20
Adjusting Intake and Exhaust Valve Clearance ........20
Drive Belt Inspection..................................................20
Changing Engine Oil..................................................21
Changing Oil Filter .....................................................21
Changing Engine Coolant..........................................22
Checking Cooling System .........................................23
Checking and Replacing fuel filter and Draining
Water .........................................................................23
Cleaning and Replacing Air Cleaner Filter (Dry
paper type).................................................................24
Checking Injection Nozzle .........................................25
Checking Idle Speed .................................................26
ZD
ENGINE MAINTENANCE..............................................28
Checking Tightening Torque ......................................28
Adjusting Intake and Exhaust Valve Clearance ........28
Checking Drive Belt ...................................................28
Removal .....................................................................29Installation ..................................................................29
Changing Engine Oil..................................................29
Changing Engine Oil Filter ........................................30
Changing Engine Coolant..........................................31
Checking Cooling System .........................................32
Checking and Replacing Fuel Filter and Draining
Water .........................................................................33
Checking Fuel Lines ..................................................34
Cleaning and Replacing Air Cleaner Filter ................35
CHASSIS AND BODY MAINTENANCE.......................36
Checking Exhaust System.........................................36
Checking Clutch Operation........................................36
Checking Clutch Fluid Level and Leaks ....................36
Checking Clutch System ...........................................36
Checking M/T Oil .......................................................36
Changing M/T Oil.......................................................37
Checking Water Entry ................................................37
Checking Transfer Oil ................................................37
Changing Transfer Oil................................................38
Checking Propeller Shaft ...........................................38
Checking Differential Gear Oil ...................................38
Changing Differential Gear Oil ..................................39
Checking Front Wheel Bearing Grease ....................39
Repacking Front Wheel Bearing Grease ..................39
Checking Free-running Hub Grease .........................40
Checking Brake Fluid Level and Leaks.....................40
Checking Brake System ............................................40
Checking Brake Booster, Vacuum Hoses,
Connections and Check Valve ..................................40
Checking Disc Brake .................................................40
Checking Drum Brake ...............................................41
Checking Foot Brake Pedal Operation......................42
Checking Parking Brake ............................................42
Changing Brake Fluid ................................................43
Balancing Wheels ......................................................43
Tire Rotation ..............................................................43
Checking Steering Gear and Linkage .......................43
Checking Fluid Level and Leaks (Power steering) ...44