Nissan Almera Tino V10. Manual — part 669
EC-1502
[YD (WITHOUT EURO-OBD)]
EGR VOLUME CONTROL SYSTEM
EGR VOLUME CONTROL SYSTEM
PFP:14710
Description
EBS0151B
SYSTEM DESCRIPTION
*: This signal is sent to the ECM through CAN communication line.
This system controls flow rate of EGR led from exhaust manifold to intake manifold. The opening of the EGR
by-pass passage in the EGR volume control valve changes to control the flow rate. A built-in step motor
moves the valve in steps corresponding to the ECM output pulses. The opening of the valve varies for opti-
mum engine control. The optimum value stored in the ECM is determined by considering various engine con-
ditions.
The EGR volume control valve remains close under the following conditions.
●
Engine stopped
●
Engine starting
●
Low engine coolant temperature
●
Excessively high engine coolant temperature
●
High engine speed
●
Wide open throttle
COMPONENT DESCRIPTION
EGR Volume Control Valve
The EGR volume control valve uses a step motor to control the flow
rate of EGR from exhaust manifold. This motor has four winding
phases. It operates according to the output pulse signal of the ECM.
Two windings are turned ON and OFF in sequence. Each time an
ON pulse is issued, the valve opens or closes, changing the flow
rate. When no change in the flow rate is needed, the ECM does not
issue the pulse signal. A certain voltage signal is issued so that the
valve remains at that particular opening.
Sensor
Input Signal to ECM
ECM Function
Actuator
Crankshaft position sensor
Engine speed
EGR volume control
EGR volume control valve
Vehicle speed sensor*
Vehicle speed
Engine coolant temperature sensor
Engine coolant temperature
Ignition switch
Start signal
Accelerator pedal position sensor
Accelerator pedal position
Mass air flow sensor
Amount of intake air
Air conditioner switch*
Air conditioner operation
SEF908Y
SEF411Y
EGR VOLUME CONTROL SYSTEM
EC-1503
[YD (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
CONSULT-II Reference Value in Data Monitor Mode
EBS0151C
Specification data are reference values.
ECM Terminals and Reference Value
EBS0151D
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.
MONITOR ITEM
CONDITION
SPECIFICATION
EGR VOL CON/V
●
Engine: After warming up
●
Air conditioner switch: OFF
●
Shift lever: Neutral position
●
No-load
After one minute at idle
More than 10 steps
Revving engine from idle to 3,600 rpm
0 step
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA
(DC Voltage)
25
26
27
28
GY
W/L
OR/B
GY/B
EGR volume control valve
[Engine is running]
●
Warm-up condition
●
Idle speed
0.1 - 14V
(Voltage signals of each ECM
terminals differ according to the
control position of EGR volume
control valve.)
105
113
G
G
ECM relay (self-shutoff)
[Ignition switch ON]
[Ignition switch OFF]
●
For a few seconds after turning ignition switch
OFF
Approximately 1.2V
[Ignition switch OFF]
●
More than a few seconds after turning ignition
switch OFF
BATTERY VOLTAGE
(11 - 14V)
119
120
R
R
Power supply for ECM
[Ignition switch ON]
BATTERY VOLTAGE
(11 - 14V)
EC-1504
[YD (WITHOUT EURO-OBD)]
EGR VOLUME CONTROL SYSTEM
Wiring Diagram
EBS0151E
MBWA0622E
EGR VOLUME CONTROL SYSTEM
EC-1505
[YD (WITHOUT EURO-OBD)]
C
D
E
F
G
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A
EC
Diagnostic Procedure
EBS0151F
1.
CHECK EGR VOLUME CONTROL SYSTEM OVERALL FUNCTION
1.
Turn ignition switch OFF.
2.
Set the oscilloscope probe between ECM terminals 25, 26, 27, 28 and ground.
3.
Start engine and let it idle.
4.
Check the oscilloscope screen when revving engine up to 3,200 rpm and return to idle.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 2.
2.
CHECK EGR VOLUME CONTROL VALVE POWER SUPPLY CIRCUIT-I
1.
Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
2.
Check voltage between ECM terminals 119, 120 and ground
with CONSULT-II or tester.
OK or NG
OK
>> GO TO 3.
NG
>> Go
to
.
The pulse signal as shown in the figure should appear.
MBIB0617E
Voltage: Battery voltage
MBIB1096E
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