Page 287 of 1833
Engine Control Component Parts Location
MEC988D
ENGINE AND EMISSION CONTROL OVERALL SYSTEMZD30DDTi
EC-12
http://vnx.su/
Page 288 of 1833
MEC989D
ENGINE AND EMISSION CONTROL OVERALL SYSTEMZD30DDTi
Engine Control Component Parts Location
(Cont'd)EC-13
http://vnx.su/
Page 289 of 1833
MEC990D
ENGINE AND EMISSION CONTROL OVERALL SYSTEMZD30DDTi
Engine Control Component Parts Location
(Cont'd)EC-14
http://vnx.su/
Page 290 of 1833
MEC029E
ENGINE AND EMISSION CONTROL OVERALL SYSTEMZD30DDTi
Engine Control Component Parts Location
(Cont'd)EC-15
http://vnx.su/
Page 299 of 1833
Injection Tube and Injection Nozzle
REMOVAL AND INSTALLATION
CAUTION:
IDo not disassemble injection nozzle assembly. If NG,
replace injection nozzle assembly.
I Plug flare nut with a cap or rag so that no dust enters the
nozzle. Cover nozzle tip for protection of needle.
Injection tube
Removal
1. Mark the cylinder Nos. to the injection tubes, then disconnect
them.
I Marking should be made at proper locations and by the
proper method, so that they are not erased by fuel, etc.
2. Remove the clamps, then disconnect the tubes one by one.
I Avoid letting leaked fuel get on the interior walls of the
engine compartment.
Take special care to prevent fuel from getting on the engine
mount insulator.
JEF237Z
JEF238Z
BASIC SERVICE PROCEDUREZD30DDTi
EC-24
http://vnx.su/
Page 519 of 1833

Description
SYSTEM DESCRIPTION
Sensor Input Signal to ECMECM
Function Actuator
Crankshaft position
sensor (TDC) Engine speed
Glow
control Glow lamp,
Glow relay "
Glow plugs
Engine coolant tem-
perature sensor Engine coolant tem-
perature
When engine coolant temperature is more than approximately 75ÉC
(167ÉF), the glow relay turns off, inactivating the quick-glow control
until coolant temperature drops below approximately 55ÉC (131ÉF).
When coolant temperature is lower than approximately 75ÉC
(167ÉF):
I
Ignition switch ON
After ignition switch has turned to ON, the glow relay turns ON
for a certain period of time in relation to engine coolant
temperature, allowing current to flow through glow plug.
I Cranking
The glow relay turns ON, allowing current to flow through glow
plug.
I Starting
After engine has started, current continues to flow through glow
plug (after-glow mode) for a certain period in relation to engine
coolant temperature.
When engine speed exceeds approximately 4,800 rpm, current
flow through glow plug is interrupted.
The glow indicator lamp turns ON for a certain period of time in
relation to engine coolant temperature at the time glow relay is
turned ON.
COMPONENT DESCRIPTION
Glow plug
I The glow plug is provided with a ceramic heating element to
obtain a high-temperature resistance. It glows in response to a
signal sent from the ECM, allowing current to flow through the
glow plug via the glow relay.
I This engine uses two types of glow plugs.
Type A has a blue or yellow paint mark.
Type B has no paint mark.
The location of the paint mark is shown in the figure.
WARNING:
Do not use two types of glow plugs at the same time.
SEF376Y
SEF280Z
GLOW CONTROL SYSTEMZD30DDTi
EC-244
http://vnx.su/
Page 592 of 1833
IDo not depress accelerator pedal when staring.
I Immediately after staring, do not rev up engine unneces-
sarily.
I Do not rev up engine just prior to shutdown.
I When installing C.B. ham radio or a mobile phone, be sure
to observe the following as it may adversely affect elec-
tronic control systems depending on installation location.
- Keep the antenna as far as possible from the electronic control units.
- Keep the antenna feeder line more than 20 cm (8 in) away from the harness of electronic controls.
Do not let them run parallel for a long distance.
- Adjust the antenna and feeder line so that the standing- wave radio can be kept smaller.
- Be sure to ground the radio to vehicle body.
SEF709Y
SEF708Y
PRECAUTIONS AND PREPARATIONTD27Ti
Precautions (Cont'd)
EC-317
http://vnx.su/
Page 598 of 1833
Engine Control Component Parts Location
YEC234A
ENGINE AND EMISSION CONTROL OVERALL SYSTEMTD27Ti
EC-323
http://vnx.su/