Infiniti QX4 (R50). Manual — part 248
SEF002Z
COMPONENT DESCRIPTION
NBEC0523S02
Swirl Control Valve Control Solenoid Valve
NBEC0523S0201
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.
CONSULT-II Reference Value in Data Monitor
Mode
NBEC0524
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
SWRL CONT S/V
I
Engine speed: Idle
Engine coolant temperature is
between 15°C (59°F) to 50°C
(122°F).
ON
Engine coolant temperature is
above 55°C (131°F).
OFF
ECM Terminals and Reference Value
NBEC0673
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)
29
G
Swirl control valve con-
trol solenoid valve
[Engine is running]
I
Idle speed
I
Engine coolant temperature is between 15 to
50°C (59 to 122°F).
0 - 1.0V
[Engine is running]
I
Idle speed
I
Engine coolant temperature is above 55°C
(131°F).
BATTERY VOLTAGE
(11 - 14V)
On Board Diagnosis Logic
NBEC0526
Malfunction is detected when
(Malfunction A) An improper voltage signal is sent to ECM through
swirl control valve control solenoid valve,
(Malfunction B) The vacuum signal is not sent to swirl control
valve under specified driving conditions, even though swirl control
valve control solenoid valve is ON,
(Malfunction C) The vacuum signal is sent to swirl control valve
even though swirl control valve control solenoid valve is OFF.
GI
MA
EM
LC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1130 SWIRL CONTROL VALVE CONTROL SOLENOID VALVE
Description (Cont’d)
EC-459
Possible Cause
NBEC0527
MALFUNCTION A
NBEC0527S01
I
Harness or connectors
(The swirl control valve control solenoid valve circuit is open or
shorted.)
I
Swirl control valve control solenoid valve
MALFUNCTION B
NBEC0527S02
I
Harness or connector
(The swirl control valve control solenoid valve circuit is open.)
I
Swirl control valve control solenoid valve
I
Intake system
(Intake air leaks)
I
Hoses and tubes between intake manifold, vacuum tank and
swirl control valve actuator
I
Swirl control valve actuator
I
Swirl control valve control vacuum check switch
I
Mass air flow sensor
I
Crankshaft position sensor (REF)
I
Throttle position sensor
MALFUNCTION C
NBEC0527S03
I
Harness or connector
(The swirl control valve control solenoid valve circuit is
shorted.)
I
Swirl control valve control vacuum check switch
I
Crankshaft position sensor (REF)
I
Throttle position sensor
I
Hoses and tubes between air cleaner and swirl control valve
vacuum check switch
I
Swirl control valve control solenoid valve
DTC Confirmation Procedure
NBEC0528
Perform “Procedure for malfunction A” first. If the 1st trip DTC
cannot be confirmed, perform “Procedure for malfunction B”.
If the 1st trip DTC is not confirmed on “Procedure for malfunc-
tion B”, perform “Procedure for malfunction C”.
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.
SEF058Y
PROCEDURE FOR MALFUNCTION A
NBEC0528S01
With CONSULT-II
NBEC0528S0101
1)
Turn ignition switch “ON”.
2)
Select “DATA MONITOR” mode with CONSULT-II.
3)
Wait at least 5 seconds.
If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-463.
With GST
NBEC0528S0102
Follow the procedure “With CONSULT-II” above.
DTC P1130 SWIRL CONTROL VALVE CONTROL SOLENOID VALVE
Possible Cause
EC-460
SEF174Y
PROCEDURE FOR MALFUNCTION B
NBEC0528S02
TESTING CONDITION:
I
For best results, perform the test at a temperature above
5°C (41°F).
I
Before performing the following procedure, confirm that
battery voltage is more than 10V at idle, then stop engine
immediately.
With CONSULT-II
NBEC0528S0201
1)
Turn ignition switch “OFF” and wait at least 10 seconds.
2)
Turn ignition switch “ON”.
3)
Check “COOLAN TEMP/S” in “DATA MONITOR” mode with
CONSULT-II.
4)
Confirm COOLAN TEMP/S value is 40°C (104°F) or less.
If the value is more than 40°C (104°F), park the vehicle in a
cool place and retry from step 1.
5)
Start engine and wait until COOLAN TEMP/S value increases
to more than 55°C (131°F).
If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-463.
With GST
NBEC0528S0202
Follow the procedure “With CONSULT-II” above.
SEF174Y
PROCEDURE FOR MALFUNCTION C
NBEC0528S03
TESTING CONDITION:
I
For best results, perform the test at a temperature above
5°C (41°F).
I
Before performing the following procedure, confirm that
battery voltage is more than 10V at idle.
With CONSULT-II
NBEC0528S0301
1)
Start engine and warm it up to normal operating temperature.
2)
Turn ignition switch “OFF” and wait at least 10 seconds.
3)
Turn ignition switch “ON” again and select “DATA MONITOR”
mode with CONSULT-II.
4)
Start engine and let it idle for at least 20 seconds. If 1st trip
DTC is detected, go to “Diagnostic Procedure”, EC-463.
With GST
NBEC0528S0302
Follow the procedure “With CONSULT-II” above.
GI
MA
EM
LC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1130 SWIRL CONTROL VALVE CONTROL SOLENOID VALVE
DTC Confirmation Procedure (Cont’d)
EC-461
Wiring Diagram
NBEC0529
MEC980C
DTC P1130 SWIRL CONTROL VALVE CONTROL SOLENOID VALVE
Wiring Diagram
EC-462
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