engine control NISSAN TERRANO 2002 Service Repair Manual

Diagnostic Procedure
1 INSPECTION START
Check fuel level, fuel supplying system, starter motor, etc.
OK or NG
OKEGO TO 2.
NGECorrect.
2 CHECK INSTALLATION
Check that all glow plug connecting plate nuts are installed properly.
MEC002E
OK or NG
OK (With CONSULT-II)EGO TO 3.
OK (Without CONSULT-II)EGO TO 4.
NGEInstall properly.
3 CHECK GLOW INDICATOR LAMP OPERATION
With CONSULT-II
1. Turn ignition switch ªONº.
2. Select ªCOOLAN TEMP/Sº in ªDATA MONITORº mode with CONSULT-II.
3. Confirm that ªCOOLAN TEMP/Sº indicates below 75ÉC (167ÉF). If it indicates above 75ÉC (167ÉF), cool down engine.
SEF013Y
4. Turn ignition switch ªOFFº, wait at least 5 seconds and then turn ªONº.
5. Make sure that glow indicator lamp is turned ªONº for 1.5 seconds or more after turning ignition switch ªONº, and then turned
ªOFFº.
OK or NG
OKEGO TO 5.
NGEGO TO 6.
GLOW CONTROL SYSTEMZD30DDTi
EC-242

4 CHECK GLOW INDICATOR LAMP OPERATION
Without CONSULT-II
1. Turn ignition switch ªONº.
2. Confirm that the voltage between ECM terminal 19 and ground is above 1.36V. If it is below 1.36V, cool down engine.
SEF430Y
3. Turn ignition switch ªOFFº, wait at least 5 seconds and then turn ªONº.
4. Make sure that glow indicator lamp is turned ªONº for 1.5 seconds or more after turning ignition switch ªONº, and then turned
ªOFFº.
OK or NG
OKEGO TO 5.
NGEGO TO 6.
5 CHECK GLOW CONTROL SYSTEM OVERALL FUNCTION
1. Turn ignition switch ªOFFº.
2. Set voltmeter probe between glow plug and engine body.
3. Turn ignition switch ªONº.
4. Check the voltage between glow plug and engine body under the following conditions.
MEC003E
MTBL1325
OK or NG
OKEINSPECTION END
NGEGO TO 10.
GLOW CONTROL SYSTEMZD30DDTi
Diagnostic Procedure (Cont'd)
EC-243

Description
SYSTEM DESCRIPTION
Sensor Input Signal to ECMECM
FunctionActuator
Ignition switch Start signal
Swirl
control
valve
controlSwirl 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 speedEngine cool-
ant tempera-
tureSwirl control
valve control
solenoid valveSwirl control
valve
OFFLess than
1,250 rpmLess than
50ÉC (122ÉF)OFF Open
More than
50ÉC (122ÉF)ON Closed
More than
1,250 rpmLess than
50ÉC (122ÉF)OFF Open
More than
50ÉC (122ÉF)OFF Open
ON Ð Ð OFF Open
SEF452Z
SWIRL CONTROL VALVE CONTROL SOLENOID VALVEZD30DDTi
EC-263

COMPONENT DESCRIPTION
Swirl control valve control solenoid valve
The swirl control valve control solenoid valve responds to signals
from the ECM. When the ECM sends an ON (ground) signal, the
solenoid valve is bypassed to apply vacuum pump vacuum to the
swirl control valve actuator. This operation closes the swirl control
valve. When the ECM sends an OFF signal, the vacuum signal is
cut and the swirl control valve opens.
CONSULT-II Reference Value in Data Monitor
Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
SWRL CONT S/VILift up the vehicle
IEngine: After warming up, let it
idle for more than 1 second.
IAir conditioner switch: OFF
INo-loadShift lever: Except ªPº and ªNeutralº
positionON
Shift lever: ªNeutralº position OFF
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
COLORITEM CONDITIOND ATA
(DC Voltage and Pulse
Signal)
54 RSwirl control valve control
solenoid valveEngine is running.
Warm-up condition
At idle speed for more than 1 second.
Lift up the vehicle
Gear position is except ªPº and ªNeutralºApproximately 0.1V
Engine is running.
Idle speed
Lift up the vehicle
Gear position is ªPº or ªNeutralºBATTERY VOLTAGE
(11 - 14V)
MEC006E
SWIRL CONTROL VALVE CONTROL SOLENOID VALVEZD30DDTi
Description (Cont'd)
EC-264

Diagnostic Procedure
1 INSPECTION START
Do you have CONSULT-II?
YesorNo
Ye sEGO TO 2.
NoEGO TO 3.
2 CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine and let it idle.
2. Select ªSWIRL CONT S/V 1º in ªACTIVE TESTº mode with CONSULT-II.
3. Touch ªONº and ªOFFº alternately on CONSULT-II screen.
4. Make sure that swirl control valve actuator rod moves according to ªSWIRL CONT S/V 1º indication.
MEC007E
MEC008E
OK or NG
OKEINSPECTION END
NGEGO TO 4.
SWIRL CONTROL VALVE CONTROL SOLENOID VALVEZD30DDTi
EC-266

3 CHECK OVERALL FUNCTION
Without CONSULT-II
1. Lift up the vehicle.
2. Start engine and warm it up to normal operating temperature.
3. Run engine at idle speed.
4. Make sure that swirl control valve actuator rod moves when shifting the shift lever to ªPº or ªNeutralº position and then to posi-
tions other than ªPº and ªNeutralº.
MEC008E
OK or NG
OKEINSPECTION END
NGEGO TO 5.
SWIRL CONTROL VALVE CONTROL SOLENOID VALVEZD30DDTi
Diagnostic Procedure (Cont'd)
EC-267

4 CHECK VACUUM SOURCE
With CONSULT-II
1. Turn ignition switch ªOFFº.
2. Disconnect vacuum hose connected to swirl control valve actuator.
3. Start engine and let it idle.
4. Select ªSWIRL CONT S/V 1º in ªACTIVE TESTº mode with CONSULT-II.
5. Touch ªONº and ªOFFº alternately on CONSULT-II screen.
6. Check vacuum hose for vacuum existence under the following conditions.
MEC007E
MEC009E
MTBL1326
OK or NG
OKEGO TO 7.
NGEGO TO 6.
SWIRL CONTROL VALVE CONTROL SOLENOID VALVEZD30DDTi
Diagnostic Procedure (Cont'd)
EC-268

5 CHECK VACUUM SOURCE
Without CONSULT-II
1. Turn ignition switch ªOFFº.
2. Disconnect vacuum hose connected to swirl control valve actuator.
3. Lift up the vehicle.
4. Start engine and warm it up to normal operating temperature.
5. Run engine at idle speed
6. Check vacuum hose for vacuum existence under the following conditions.
MEC009E
MTBL1327
OK or NG
OKEGO TO 7.
NGEGO TO 6.
SWIRL CONTROL VALVE CONTROL SOLENOID VALVEZD30DDTi
Diagnostic Procedure (Cont'd)
EC-269

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
Sensor Input Signal to ECMECM
FunctionActuator
Ignition switch OFFIntake
air con-
trol
valve
controlIntake 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
COLORITEM CONDITION DATA (DC Voltage)
2LGIntake air control valve
control solenoid valveEngine is running.
BATTERY VOLTAGE
(11 - 14V)
Ignition switch ªOFFº
For a few seconds after engine stopsApproximately 0.1V
MEC006E
INTAKE AIR CONTROL VALVE CONTROL SOLENOID
VA LV EZD30DDTi
EC-273

Diagnostic Procedure
1 CHECK OVERALL FUNCTION
1. Start engine and let it idle.
2. Make sure that intake air control valve actuator rod moves when turning ignition switch ªOFFº.
MEC011E
OK or NG
OKEINSPECTION END
NGEGO TO 2.
2 CHECK VACUUM SOURCE
1. Turn ignition switch ªOFFº.
2. Disconnect vacuum hose connected to intake air control valve actuator.
3. Start engine and let it idle.
4. Check vacuum hose for vacuum existence under the following conditions.
MEC012E
MTBL1328
OK or NG
OKEGO TO 3.
NGEGO TO 4.
INTAKE AIR CONTROL VALVE CONTROL SOLENOID
VA LV EZD30DDTi
EC-275