Nissan Primera P11. Manual — part 106
EGRC-Solenoid Valve
SYSTEM DESCRIPTION
Camshaft position sensor (TDC)
E
Engine speed
ECM
Air conditioner switch
E
Air conditioner “ON” signal
E
EGRC-solenoid valve
Engine coolant temperature sensor
E
Engine coolant temperature
Atmospheric pressure sensor
E
Atmospheric pressure
Mass air flow sensor
E
Mass air flow
The ECM receives signals sent from the engine coolant tempera-
ture sensor, crankshaft position sensor (TDC), atmospheric pres-
sure sensor, mass air flow sensor and air conditioner switch to
determine engine speed and operating conditions. Based on
these signals, the ECM controls the EGR control solenoid valve
operation.
No EGR operation will take place when the engine coolant tem-
perature is below 70°C (158°F), when idling, at starting and dur-
ing a period of time after starting the engine (70 - 200 seconds,
depending on engine coolant temperature).
Engine coolant
temperature °C (°F)
Load
EGRC-solenoid valve
EGR valve
Amount of EGR gas
Below 70 (158)
Any
OFF
(Closed)
Fully closed
—
Above 70 (158)
Low load
ON
(Open)
Fully open
Large
High load
OFF
(Closed)
Fully closed
—
COMPONENT DESCRIPTION
The EGR control solenoid valves control vacuum pressure act-
ing on the EGR valve. The EGR control valve will then be fully
opened or fully closed, as required.
Thus, intake air passages are opened or closed in relation to
exhaust gas and intake air. Utilizing the relationship between
exhaust gas pressure and intake air pressure control, the amount
of EGR (exhaust gas recirculated) is regulated in large or small
volumes.
Malfunction is detected when .
Check Items
(Possible cause)
●
EGRC-solenoid valve A circuit is shorted.
●
Harness or connectors
(EGRC-solenoid valve A circuit is open or shorted).
●
EGRC solenoid valve A
SEF240PH
To control valve
To intake
air flow
Vacuum
signal
TROUBLE DIAGNOSES 16
CD20T
EC-129
DIAGNOSTIC TROUBLE CONFIRMATION
PROCEDURE
1)
Turn ignition switch to the “ON” position.
2)
Select “DATA MONITOR” mode with CONSULT-II.
3)
Wait at least 2 seconds.
TROUBLE DIAGNOSES 16
CD20T
EGRC-Solenoid Valve (Cont’d)
EC-130
YEC814
BATTERY
Refer to EL-POWER.
: Detectable line for DTC
: Non-detectable line for DTC
EGRC-
SOLENOID
VALVE A
ENGINE
CONTROL
MODULE
RELAY
ECM
EGRC-
SOLENOID
VALVE B
TROUBLE DIAGNOSES 16
CD20T
EGRC-Solenoid Valve (Cont’d)
EC-131
DIAGNOSTIC PROCEDURE
INSPECTION START
(Circuit for EGRC-solenoid valve A)
CHECK MAIN POWER SUPPLY.
Refer to Trouble Diagnosis for main
power supply (EC-CD-59)
CHECK POWER SUPPLY.
1. Turn ignition switch to the “LOCK”
position.
2. Disconnect EGRC-solenoid valve A
harness connector.
3. Turn ignition switch to the “ON” posi-
tion.
4. Check voltage between connector
terminal
p
2
and engine ground.
Voltage: Battery voltage
OK
E
NG
Check the following:
●
Harness continuity
between ECM relay
and EGRC-solenoid
valve A connector.
If NG, repair harness or
connectors.
CHECK OUTPUT SIGNAL CIRCUIT.
1. Turn ignition switch to the “LOCK”
position.
2. Disconnect ECM harness connector.
3. Check harness continuity between
ECM harness connector terminal
208
and EGRC solenoid valve A
connector terminal
p
1
.
Continuity should exist.
If OK, check harness for short-cir-
cuit.
OK
E
NG
Check the following:
●
Harness for open or
short-circuit between
ECM and solenoid
valve.
If NG, repair harness or
connectors.
CHECK COMPONENTS
(EGRC-solenoid valve).
Refer to “COMPONENT INSPECTION”
EC-CD-135.
OK
E
NG
Replace malfunctioning
component(s).
Disconnect and reconnect harness
connectors in the circuit. Then retest.
Trouble is not fixed
Check ECM pin terminals for damage
or the connection of ECM harness con-
nector. Reconnect ECM harness con-
nector and retest.
INSPECTION END
EGRC solenoid valve A
harness connector
NEF219A
EGRC solenoid
valve A harness
connector
NEF220A
H
H
H
H
H
H
H
TROUBLE DIAGNOSES 16
CD20T
EGRC-Solenoid Valve (Cont’d)
EC-132
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