Nissan Primera P12. Instruction — part 256
DTC P0404 EGR VOLUME CONTROL VALVE
EC-209
[YD (WITH EURO-OBD)]
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EC
DTC P0404 EGR VOLUME CONTROL VALVE
PFP:14710
Description
EBS013P2
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
●
High engine speed
●
Accelerator pedal fully depressed
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 con-
trol
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
EC-210
[YD (WITH EURO-OBD)]
DTC P0404 EGR VOLUME CONTROL VALVE
CONSULT-II Reference Value in Data Monitor Mode
EBS013P3
Specification data are reference values.
ECM Terminals and Reference Value
EBS013P4
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.
On Board Diagnosis Logic
EBS013P5
DTC Confirmation Procedure
EBS013P6
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-II
1.
Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.
2.
Start engine.
3.
Maintain the following conditions for at least 20 consecutive sec-
onds.
MONITOR ITEM
CONDITION
SPECIFICATION
EGR VOL CON/V
●
Engine: After warming up
●
Air conditioner switch: OFF
●
Shift lever: Neutral position
●
No-load
After 1 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 ter-
minals differ according to the con-
trol position of EGR volume
control valve.)
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0404
Exhaust gas recirculation con-
trol circuit range/performance
An improper voltage signal is sent to
ECM through EGR volume control
valve.
●
Harness or connectors
(The EGR volume control valve
circuit is open or shorted.)
●
EGR volume control valve stuck
closed
PBIB2156E
DTC P0404 EGR VOLUME CONTROL VALVE
EC-211
[YD (WITH EURO-OBD)]
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EC
4.
If 1st trip DTC is detected, go to
EC-213, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
COOLAN TEMP/S
22 - 87
°
C (72 - 189
°
F)
Voltage between ECM terminal 55 (Intake air tem-
perature sensor) and ground
0.9 - 4.0V
PBIB2017E
EC-212
[YD (WITH EURO-OBD)]
DTC P0404 EGR VOLUME CONTROL VALVE
Wiring Diagram
EBS013P7
MBWA0619E
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