Nissan Almera Tino V10 (2001 year). Manual — part 57
8
CHECK VACUUM HOSES AND TUBES
1. Disconnect vacuum hoses between the air control valve (Power steering) and vacuum port, air control valve (Power
steering) and air duct.
2. Check hoses and tubes for cracks, clogging, improper connection or disconnection.
SEF109L
OK or NG
OK
©
GO TO 9.
NG
©
Repair hoses or tubes.
9
CHECK IACV-AAC VALVE
Refer to “Component Inspection”, EC-474.
OK or NG
OK
©
GO TO 11.
NG
©
GO TO 10.
10
REPLACE IACV-AAC VALVE
1. Replace IACV-AAC valve assembly.
2. Perform “Idle Air Volume Learning”, EC-57.
Is the result CMPLT or INCMP?
CMPLT or INCMP
CMPLT
©
INSPECTION END
INCMP
©
Follow the construction of “Idle Air Volume Learning”.
11
CHECK TARGET IDLE SPEED
1. Turn ignition switch “OFF”.
2. Reconnect all harness connectors and vacuum hoses.
3. Start engine and warm it up to normal operating temperature.
4. Also warm up transmission to normal operating temperature.
+
For M/T models, drive vehicle for 10 minutes.
5. Stop vehicle with engine running.
6. Check target idle speed.
700
±
50 rpm
OK or NG
OK
©
GO TO 12.
NG
©
Perform “Idle Air Volume Learning”, EC-57.
12
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-145.
©
INSPECTION END
IDLE AIR CONTROL VALVE (IACV) —
AUXILIARY AIR CONTROL (AAC) VALVE
QG18DE
Diagnostic Procedure (Cont’d)
EC-473
SEF605Y
SEF089X
Component Inspection
NLEC1312
IACV-AAC VALVE
NLEC1312S01
1)
Disconnect IACV-AAC valve harness connector.
2)
Check IACV-AAC valve resistance.
Condition
Resistance
Terminal 2 and terminals 1, 3
20 - 24
Ω
[at 20°C (68°F)]
Terminal 5 and terminals 4, 6
3)
Reconnect IACV-AAC valve harness connector.
4)
Remove idle air adjusting unit assembly (IACV-AAC valve is
built-in) from engine.
(The IACV-AAC valve harness connector should remain con-
nected.)
5)
Turn ignition switch “ON” and “OFF”, and ensure the IACV-
AAC valve shaft smoothly moves forward and backward,
according to the ignition switch position.
If NG, replace the IACV-AAC valve.
IDLE AIR CONTROL VALVE (IACV) —
AUXILIARY AIR CONTROL (AAC) VALVE
QG18DE
Component Inspection
EC-474
SEF095X
Component Description
NLEC1313
The valve timing control system is utilized to control intake valve
opening and closing timing. Engine coolant temperature signals,
engine speed and throttle position are used to determine intake
valve timing.
The intake camshaft sprocket position is regulated by oil pressure
controlled by the intake valve timing control.
When ECM sends ON signal to intake valve timing control solenoid
valve, oil pressure is transmitted to camshaft sprocket. Then, intake
side camshaft is advanced.
Operation
NLEC1314
Engine operating condition
Intake valve tim-
ing control sole-
noid valve
Intake valve
opening and
closing time
Valve overlap
Engine coolant
temperature
Engine speed
B/FUEL SCHDL
Neutral switch
20°C (68°F) -
70°C (158°F)
1,150 - 4,600
rpm
Above 3 msec
OFF
ON
Advance
Increased
Above 70°C
(158°F)
Above 7 msec
Conditions other than those above
OFF
Normal
Normal
CONSULT-II Reference Value in Data Monitor
Mode
NLEC1315
MONITOR ITEM
CONDITION
SPECIFICATION
INT/V SOL-B1
+
Engine: After warming up
+
Lift up vehicle and suitable gear
position
Idle
OFF
Revving engine from 2,000 to
3,000 rpm
ON
ECM Terminals and Reference Value
NLEC1316
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 result in dam-
age to the ECM’s transistor. Use a ground other than ECM terminals, such as the ground.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
1
Y/R
Intake valve timing control
solenoid valve
[Engine is running]
+
Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
+
Warm-up condition
+
Lift up vehicle and suitable gear position
+
Rev engine up from 2,000 to 3,000 rpm
Approximately 0V
INTAKE VALVE TIMING CONTROL SOLENOID VALVE
QG18DE
Component Description
EC-475
Wiring Diagram
NLEC1319
MODELS WITH ECM IN ENGINE COMPARTMENT
NLEC1319S01
YEC754
INTAKE VALVE TIMING CONTROL SOLENOID VALVE
QG18DE
Wiring Diagram
EC-476
MODELS WITH ECM IN CABIN
NLEC1319S02
YEC900
INTAKE VALVE TIMING CONTROL SOLENOID VALVE
QG18DE
Wiring Diagram (Cont’d)
EC-477
Diagnostic Procedure
NLEC1320
1
INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes
©
GO TO 2.
No
©
GO TO 3.
2
CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine and warm it up to normal operation temperature.
2. Select “INT/V SOL-B1” in “DATA MONITOR” mode with CONSULT-II.
3. Lift up vehicle and simulate driving in a suitable gear position.
4. Check the “INT/V SOL-B1” singal under the following conditions.
SEF758Z
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 4.
3
CHECK OVERALL FUNCTION
Without CONSULT-II
1. Start engine engine and warm it up to normal operation temperature.
2. Lift up vehicle and simulate driving in a suitable gear position.
3. Check the voltage between ECM terminal 1 and ground under the following conditions.
SEF757Z
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 4.
INTAKE VALVE TIMING CONTROL SOLENOID VALVE
QG18DE
Diagnostic Procedure
EC-478
4
CHECK POWER SUPPLY
1. Turn ignition switch “OFF”.
2. Disconnect intake valve timing control solenoid valve harness connector.
SEF149X
3. Turn ignition switch “ON”.
4. Check voltage between terminal 1 and engine ground with CONSULT-II or tester.
SEF619X
OK or NG
OK
©
GO TO 6.
NG
©
GO TO 5.
5
DETECT MALFUNCTIONING PART
Check the following.
+
Harness connectors F35, E75 (where fitted)
+
Harness connectors M72, F44 (where fitted)
+
10A fuse
+
Harness for open or short between valve timing control solenoid valve and fuse
©
Repair harness or connectors.
6
CHECK OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 1 and intake valve timing control solenoid valve harness connector
terminal 2. Refer to wiring diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 7.
NG
©
Repair open circuit or short to ground to short to power or connectors.
INTAKE VALVE TIMING CONTROL SOLENOID VALVE
QG18DE
Diagnostic Procedure (Cont’d)
EC-479
7
CHECK VALVE TIMING CONTROL SOLENOID VALVE
Refer to “Component Inspection”, EC-480.
OK or NG
OK
©
GO TO 8.
NG
©
Replace valve timing control solenoid valve.
8
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-145.
©
INSPECTION END
SEF159Y
Component Inspection
NLEC1321
INTAKE VALVE TIMING CONTROL SOLENOID VALVE
NLEC1321S01
1.
Check oil passage visually for any metal debris.
2.
Supply intake valve timing control solenoid valve terminals with
battery voltage.
3.
Make sure that inside plunger protrudes.
If NG, replace intake valve timing control solenoid valve.
INTAKE VALVE TIMING CONTROL SOLENOID VALVE
QG18DE
Diagnostic Procedure (Cont’d)
EC-480
Description
NLEC1248
SYSTEM DESCRIPTION
NLEC1248S01
Sensor
Input Signal to ECM
ECM func-
tion
Actuator
Throttle position sensor
Throttle position
Swirl con-
trol valve
system
control
Swirl control valve control sole-
noid valve via swirl control
valve
Ignition switch
Start signal
Crankshaft position sensor (POS)
Engine speed
Camshaft position sensor (PHASE)
Engine speed and cylinder number
Mass air flow sensor
Amount of intake air
Engine coolant temperature sensor
Engine coolant temperature
This system has a swirl control valve in the intake passage of each cylinder.
While idling and during low engine speed operation, the swirl control 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 combus-
tion chamber.
Because of this operation, this system tends to increase the burning 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.
The solenoid valve controls swirl control valve’s shut/open condition. This solenoid valve is operated by the
ECM.
OPERATION
NLEC1248S02
Engine coolant tempera-
ture
Throttle position sensor
(Idle position)
Engine speed
Swirl control valve con-
trol solenoid valve
Swirl control valve
15 - 40°C
(59 - 104°F)
ON
—
ON
Closed
OFF
Below 2,400 rpm*
Except above
OFF
Open
*: The value may vary according to accelerator pedal operation.
SEF081X
CONSULT-II Reference Value in Data Monitor
Mode
NLEC1249
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
SWRL CONT S/V
+
Engine speed: Idle
Engine coolant temperature is
between 15°C (59°F) to 40°C
(104°F).
ON
Engine coolant temperature is
above 40°C (104°F).
OFF
SWIRL CONTROL VALVE CONTROL SYSTEM
(WHERE FITTED)
QG18DE
Description
EC-481
ECM Terminals and Reference Value
=NLEC1250
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 result in dam-
age to the ECM’s transistor. Use a ground other than ECM terminals, such as the ground.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
104
SB
Swirl control valve control
solenoid valve
[Engine is running]
+
Engine coolant temperature is between 15°C
(59°F) to 40°C (104°F).
+
Idle speed
0 - 1V
[Engine is running]
+
Engine coolant temperature is above 40°C
(104°F).
+
Idle speed
BATTERY VOLTAGE
(11 - 14V)
SEF098X
Component Description
NLEC1251
SWIRL CONTROL VALVE CONTROL SOLENOID VALVE
NLEC1251S01
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 intake manifold 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.
SWIRL CONTROL VALVE AND ACTUATOR
NLEC1251S02
By controlling the solenoid valve, the actuator pulls on the lever of
the swirl control valve and closes it when vacuum accumulated in
the vacuum tank is supplied.
VACUUM TANK
NLEC1251S03
The vacuum tank is for accumulating vacuum to move the actua-
tor. The vacuum pressure is supplied through the one-way valve
from the intake manifold.
ONE-WAY VALVE
NLEC1251S04
The one-way valve, located between the intake manifold and the
vacuum tank, prevents back-flow of the vacuum tank. When
installing, the colored side should face the vacuum source.
SWIRL CONTROL VALVE CONTROL SYSTEM
(WHERE FITTED)
QG18DE
ECM Terminals and Reference Value
EC-482
Wiring Diagram
NLEC1254
YEC661
SWIRL CONTROL VALVE CONTROL SYSTEM
(WHERE FITTED)
QG18DE
Wiring Diagram
EC-483
Diagnostic Procedure
NLEC1255
1
INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes
©
GO TO 2.
No
©
GO TO 3.
2
CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine and let it idle.
2. Select “SWIRL CONT SOL/V” in “ACTIVE TEST” mode with CONSULT-II.
3. Touch “ON” and “OFF” on CONSULT-II screen.
4. Make sure that the swirl control valve opens and closes by observing the lever movement.
SEF242Z
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 4.
SWIRL CONTROL VALVE CONTROL SYSTEM
(WHERE FITTED)
QG18DE
Diagnostic Procedure
EC-484
3
CHECK OVERALL FUNCTION
Without CONSULT-II
1. Disconnect engine coolant temperature sensor harness connector.
2. Connect a resistor (1.5 - 2.0 k
Ω
) between terminals of engine coolant temperature sensor harness connector.
SEF982UB
3. Start engine and let it idle.
4. In idle with the swirl control valve set to CLOSE, verify by observing the lever movement that the valve changes to
OPEN when the engine rpm exceeds 2,400 rpm.
SEF242Z
OK or NG
OK
©
INSPECTION END
NG
©
Remove resistor. GO TO 4.
SWIRL CONTROL VALVE CONTROL SYSTEM
(WHERE FITTED)
QG18DE
Diagnostic Procedure (Cont’d)
EC-485
4
CHECK VACUUM EXISTENCE
With CONSULT-II
1. Reconnect the disconnected harness connectors.
2. Start engine and let it idle.
3. Remove vacuum hose connected to swirl control valve actuator.
4. Select “SWIRL CONT SOL/V” in “ACTIVE TEST” mode with CONSULT-II.
5. Touch “ON” and “OFF” on CONSULT-II screen.
6. Check vacuum existence and operation delay time under the following conditions.
SEF243Z
Without CONSULT-II
1. Reconnect ECM harness connector.
2. Remove vacuum hose connected to swirl control valve actuator.
3. Start engine and let it idle.
4. Apply 12V of direct current between swirl control valve control solenoid valve terminals 1 and 2.
5. Check vacuum existence and operation delay time under the following conditions.
SEF244Z
OK or NG
OK
©
GO TO 9.
NG
©
GO TO 5.
SWIRL CONTROL VALVE CONTROL SYSTEM
(WHERE FITTED)
QG18DE
Diagnostic Procedure (Cont’d)
EC-486
5
CHECK POWER SUPPLY
1. Disconnect swirl control valve control solenoid valve harness connector.
2. Turn ignition switch “ON”.
3. Check voltage between terminal 2 and ground with CONSULT-II or tester.
SEF619X
OK or NG
OK
©
GO TO 7.
NG
©
GO TO 6.
6
DETECT MALFUNCTIONING PART
Check the following.
+
Harness connectors E75, F35
+
10A fuse
+
Harness for open or short between swirl control valve control solenoid valve and fuse
©
Repair harness or connectors.
7
CHECK OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 104 and swirl control valve control solenoid valve harness connector
terminal 2 with CONSULT-II or tester.
Refer to wiring diagram.
Continuity should exist.
If OK, check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 8.
NG
©
Repair open circuit, short to ground or short to power in harness connectors.
8
CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE
Refer to “Component Inspection”, EC-488.
OK or NG
OK
©
GO TO 10.
NG
©
Replace swirl control valve control solenoid valve.
9
CHECK ACTUATOR
Refer to “Component Inspection”, EC-488.
OK or NG
OK
©
INSPECTION END
NG
©
Replace swirl control valve and actuator.
SWIRL CONTROL VALVE CONTROL SYSTEM
(WHERE FITTED)
QG18DE
Diagnostic Procedure (Cont’d)
EC-487
10
CHECK HOSES
Check hoses and tubes between intake manifold, and swirl control valve actuator for crack, clogging, improper connection
or disconnection.
SEF109L
OK or NG
OK
©
GO TO 11.
NG
©
Repair hoses or tubes.
11
CHECK VACUUM TANK
Refer to “Component Inspection”, EC-488.
OK or NG
OK
©
GO TO 12.
NG
©
Replace vacuum tank.
12
CHECK ONE-WAY VALVE
Refer to “Component Inspection”, EC-488.
OK or NG
OK
©
INSPECTION END
NG
©
Replace one-way valve.
SEF103X
Component Inspection
NLEC1256
SWIRL CONTROL VALVE AND ACTUATOR
NLEC1256S01
Supply vacuum to actuator and check swirl control valve operation.
Condition
Swirl control valve
Supply vacuum to actuator
Close
No supply
Open
If NG, replace swirl control valve and actuator.
SWIRL CONTROL VALVE CONTROL SYSTEM
(WHERE FITTED)
QG18DE
Diagnostic Procedure (Cont’d)
EC-488
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