
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
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Description
SYSTEM DESCRIPTION
SensorInput Signal to ECM ECM
Function Actuator
Ignition switch Start signal Swirl
control valve
control Swirl control valve control solenoid valve
"Vacuum signal
Swirl control valve actuator "
Swirl control valve
Crankshaft position sensor (TDC) Engine speed
PNP switch Park/Neutral position signal
Engine coolant temperature sensor Engine coolant temperature
This system has a swirl control valve in the throttle body.
While idling and during low engine speed operation, the swirl con-
trol valve closes. Thus the velocity of the air in the intake passage
increases, promoting the vaporization of the fuel and producing a
swirl in the combustion chamber.
Because of this operation, this system tends to increase the burn-
ing speed of the gas mixture, improve fuel consumption, and
increase the stability in running conditions.
Also, except when idling and during low engine speed operation,
this system opens the swirl control valve. In this condition, this
system tends to increase power by improving intake efficiency via
reduction of intake flow resistance, intake flow.
The solenoid valve controls swirl control valve's shut/open condi-
tion. This solenoid valve is operated by the ECM.
PNP switch Engine speed
Engine cool-
ant tempera- ture Swirl control
valve control
solenoid valve Swirl control
valve
OFF Less than
1,250 rpm
Less than
50ÉC (122ÉF) OFF Open
More than
50ÉC (122ÉF) ON Closed
More than
1,250 rpm Less than
50ÉC (122ÉF) OFF Open
More than
50ÉC (122ÉF) OFF Open
ON Ð Ð OFF Open
SEF452Z
SWIRL CONTROL VALVE CONTROL SOLENOID VALVEZD30DDTi
EC-271
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Description
Vibration when stopping the engine can be controlled by cutting
intake air just before the fuel is cut. The intake air control valve
control solenoid valve controls the ON-OFF load of the intake air
control valve actuator. As a result, the intake air control valve con-
trol solenoid valve will be turned ON when the ignition switch is
turned OFF with the engine running and when the engine stalls.
After the engine has stopped, the intake air control valve control
solenoid valve will return to fully open.
Operation
SensorInput Signal to ECM ECM
Function Actuator
Ignition switch OFF Intake
air con- trol
valve
control Intake air control valve control solenoid
valve"
Intake air control valve actuator
Crankshaft position sensor (TDC) Engine stall
ECM Terminals and Reference Value
Specification data are reference values, and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may damage the
ECM's transistor. Use a ground other than ECM terminals, such as the ground.
TER-
MINAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
2LG Intake air control valve
control solenoid valve Engine is running.
BATTERY VOLTAGE
(11 - 14V)
Ignition switch ªOFFº
For a few seconds after engine stops Approximately 0.1V
MEC006E
INTAKE AIR CONTROL VALVE CONTROL SOLENOID
VA LV EZD30DDTi
EC-281
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General Specifications
Unit: rpm
EngineZD30DDTi
Idle speed 750 25
Maximum engine speed 4,300
Injection Pump Numbers
EnginePart numberPump assembly number
ZD30DDTi 16700 VG100 109342-4023
Injection Nozzle
Unit: kPa (bar, kg/cm2, psi)
Initial injection pressureUsed 19,026 (190.3, 194, 2,759)
New 19,516 - 20,497 (195.2 - 205.0, 199 - 209, 2,830 - 2,972)
Limit 16,182 (161.8, 165, 2,346)
Engine Coolant Temperature Sensor
Temperature ÉC (ÉF)
Resistance kW
20 (68) 2.1 - 2.9
50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
Crankshaft Position Sensor (TDC)
Resistance [at 20ÉC (68ÉF)] W 1,287 - 1,573
Glow Plug
Resistance [at 20ÉC (68ÉF)]W Approximately 0.5
Accelerator Position Sensor
Throttle valve conditionsResistance between terminals 2 and 3 kW[at 25ÉC (77ÉF)]
Completely closed Approximately 0.5
Partially open 0.5-4
Completely open Approximately 4
EGR Volume Control Valve
Resistance [at 25ÉC (77ÉF)]W 13-17
SERVICE DATA AND SPECIFICATIONS (SDS)ZD30DDTi
EC-312
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Alphabetical & Numerical Index for DTC
ALPHABETICAL INDEX FOR DTC
X: Applicable Ð: Not applicable
Items
(CONSULT-II screen terms) DTC
MI illuminationReference page
CONSULT-II
GST*1 ECM*2
ACCEL POS SENSOR P0120 0403 X EC-388
AIR CONDITIONR RLY P1530 0805 X EC-463
BRAKE SW P0571 0807 X EC-423
CONT SLEEV POS SEN P1207 0105 X EC-437
COOLANT TEMP SEN P0115 0103 X EC-384
CRANK POS SEN
(TDC) P0335 0407 X EC-408
ECM RLY P1620 0902 X EC-469
ECM 2 P1607 0301 X EC-467
ECM 10 P1107 0802 Ð EC-430
ECM 12 P1603 0901 X EC-467
EGR SOL/V A P1404 0806 Ð EC-454
EGR SOL/V B P1405 0808 Ð EC-454
F/INJ F/B 2 P1206 0108 X EC-432
F/INJ TIMG F/B P1246 0201 X EC-403
FUEL CUT S/V 1 P0215 0306 X EC-399
FUEL TEMP SENSOR P0180 0402 X EC-395
GLOW LAMP P0381 0908 Ð EC-412
GLOW RELAY P0380 0803 Ð EC-412
INJ TIMING CONT/V P0216 0904 X EC-403
MAS AIR FLOW SEN P0100 0102 X EC-379
MI P0650 0907 Ð EC-427
NEEDL LIFT SE (RPM) P1242 0906 X EC-450
NEEDLE LIFT SEN P1240 0304 X EC-450
NO SELF DIAGNOSTIC
FAILURE INDICATED P0000 0505 Ð Ð
OVER HEAT P1217 0208 X EC-441
THROTTLE SOLENOID
VA LV E P1407 0808 Ð EC-454
VEHICLE SPEED SEN P0500 0104 Ð EC-420
*1: These numbers are prescribed by ISO 15031-6.
*2: In Diagnostic Test Mode II (Self-diagnostic results). These numbers are controlled by NISSAN.
TROUBLE DIAGNOSIS Ð INDEXTD27Ti
EC-313
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NUMERICAL INDEX FOR DTC
X: Applicable Ð: Not applicable
DTCItems
(CONSULT-II screen terms) MI illumination Reference page
CONSULT-II
GST*1 ECM*2
P0000 0505 NO SELF DIAGNOSTIC
FAILURE INDICATED ÐÐ
P0100 0102 MAS AIR FLOW SEN X EC-379 P0115 0103 COOLANT TEMP SEN X EC-384
P0120 0403 ACCEL POS SENSOR X EC-388
P0180 0402 FUEL TEMP SENSOR X EC-395
P0215 0306 FUEL CUT S/V 1 X EC-399
P0216 0904 INJ TIMING CONT/V X EC-403
P0335 0407 CRANK POS SEN
(TDC) X EC-408
P0380 0803 GLOW RELAY Ð EC-412
P0381 0908 GLOW LAMP Ð EC-412
P0500 0104 VEHICLE SPEED SEN Ð EC-420
P0571 0807 BRAKE SW X EC-423
P0650 0907 MI Ð EC-427 P1107 0802 ECM 10 Ð EC-430
P1206 0108 F/INJ F/B 2 X EC-432
P1207 0105 CONT SLEEV POS SEN X EC-437
P1217 0208 OVER HEAT X EC-441
P1240 0304 NEEDLE LIFT SEN X EC-450
P1242 0906 NEEDL LIFT SE(RPM) X EC-450
P1246 0201 F/INJ TIMG F/B X EC-403
P1404 0806 EGR SOL/V A Ð EC-454
P1405 0808 EGR SOL/V B Ð EC-454
P1407 0808 THROTTLE SOLENOID
VA LV E Ð EC-454
P1530 0805 AIR CONDITIONR RLY X EC-463
P1603 0901 ECM 12 X EC-467
P1607 0301 ECM 2 X EC-467
P1620 0902 ECM RLY X EC-469
*1: These numbers are prescribed by ISO 15031-6.
*2: In Diagnostic Test Mode II (Self-diagnostic results). These numbers are controlled by NISSAN.
TROUBLE DIAGNOSIS Ð INDEXTD27Ti
Alphabetical & Numerical Index for DTC
(Cont'd)
EC-314
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Precautions
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) ªAIR BAGº AND ªSEAT BELT
PRE-TENSIONERº
The Supplemental Restraint System such as ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº used along with
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS composition which is available to NISSAN MODEL R20 is as follows (The composition
varies according to the destination and optional equipment.):
IFor a frontal collision
The Supplemental Restraint System consists of driver air bag module (located in the center of the steer-
ing wheel), front passenger air bag module (located on the instrument panel on passenger side), front seat
belt pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.
I For a side collision
The Supplemental Restraint System consists of front side air bag module (located in the outer side of front
seat), side air bag (satellite) sensor, diagnosis sensor unit (one of components of air bags for a frontal
collision), wiring harness, warning lamp (one of components of air bags for a frontal collision).
WARNING:
I To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance should be per-
formed by an authorized NISSAN dealer.
I Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system.
I Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. Spiral cable and wiring harnesses covered with yellow insulation tape either just
before the harness connectors or for the complete harness are related to the SRS.
PRECAUTIONS
IBefore connecting or disconnecting the ECM harness
connector, turn ignition switch OFF and disconnect nega-
tive battery terminal. Failure to do so may damage the ECM
because battery voltage is applied to ECM even if ignition
switch is turned off.
I Do not disassemble ECM.
SEF289H
PRECAUTIONS AND PREPARATIONTD27Ti
EC-315
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IWhen connecting or disconnecting pin connectors into or
from ECM, take care not to damage pin terminals (bend or
break).
Make sure that there are not any bends or breaks on ECM
pin terminal, when connecting pin connectors.
I Securely connect ECM harness connectors.
A poor connection can cause an extremely high (surge)
voltage to develop in coil and condenser, thus resulting in
damage to IC's.
I Keep engine control system harness at least 10cm (4 in)
away from adjacent harness, to prevent engine control
system malfunctions due to receiving external noise,
degraded operation of IC's, etc.
I Keep engine control system parts and harness dry.
I Before replacing ECM, perform Terminals and Reference
Value inspection and make sure ECM functions properly.
I After performing each TROUBLE DIAGNOSIS, perform
ªDTC Confirmation Procedureº or ªOverall Function
Checkº.
The DTC should not be displayed in the ªDTC Confirmation
Procedureº if the repair is completed. The ªOverall Func-
tion Checkº should be a good result if the repair is com-
pleted.
I When measuring ECM signals with a circuit tester, never
allow the two tester probes to contact.
Accidental contact of probes will cause a short circuit and
damage the ECM power transistor.
I Do not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the
ECM's transistor. Use a ground other than ECM terminals,
such as the ground.
I Do not disconnect supply pump harness connector with
engine running.
I Do not disassemble fuel pump.
If NG, take proper action.
I Do not disassemble fuel injector.
If NG, replace fuel injector.
I Even a slight leak in the air intake system can cause seri-
ous problems.
I Do not shock or jar the crankshaft position sensor and the
camshaft position sensor.
SEF291H
MEF040D
SEF348N
PRECAUTIONS AND PREPARATIONTD27Ti
Precautions (Cont'd)
EC-316
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